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Sample records for high-alpha research vehicle

  1. High-Alpha Research Vehicle (HARV) longitudinal controller: Design, analyses, and simulation resultss

    Science.gov (United States)

    Ostroff, Aaron J.; Hoffler, Keith D.; Proffitt, Melissa S.; Brown, Philip W.; Phillips, Michael R.; Rivers, Robert A.; Messina, Michael D.; Carzoo, Susan W.; Bacon, Barton J.; Foster, John F.

    1994-01-01

    This paper describes the design, analysis, and nonlinear simulation results (batch and piloted) for a longitudinal controller which is scheduled to be flight-tested on the High-Alpha Research Vehicle (HARV). The HARV is an F-18 airplane modified for and equipped with multi-axis thrust vectoring. The paper includes a description of the facilities, a detailed review of the feedback controller design, linear analysis results of the feedback controller, a description of the feed-forward controller design, nonlinear batch simulation results, and piloted simulation results. Batch simulation results include maximum pitch stick agility responses, angle of attack alpha captures, and alpha regulation for full lateral stick rolls at several alpha's. Piloted simulation results include task descriptions for several types of maneuvers, task guidelines, the corresponding Cooper-Harper ratings from three test pilots, and some pilot comments. The ratings show that desirable criteria are achieved for almost all of the piloted simulation tasks.

  2. Redesign of a Variable-Gain Output Feedback Longitudinal Controller Flown on the High-Alpha Research Vehicle (HARV)

    Science.gov (United States)

    Ostroff, Aaron J.

    1998-01-01

    This paper describes a redesigned longitudinal controller that flew on the High-Alpha Research Vehicle (HARV) during calendar years (CY) 1995 and 1996. Linear models are developed for both the modified controller and a baseline controller that was flown in CY 1994. The modified controller was developed with three gain sets for flight evaluation, and several linear analysis results are shown comparing the gain sets. A Neal-Smith flying qualities analysis shows that performance for the low- and medium-gain sets is near the level 1 boundary, depending upon the bandwidth assumed, whereas the high-gain set indicates a sensitivity problem. A newly developed high-alpha Bode envelope criterion indicates that the control system gains may be slightly high, even for the low-gain set. A large motion-base simulator in the United Kingdom was used to evaluate the various controllers. Desired performance, which appeared to be satisfactory for flight, was generally met with both the low- and medium-gain sets. Both the high-gain set and the baseline controller were very sensitive, and it was easy to generate pilot-induced oscillation (PIO) in some of the target-tracking maneuvers. Flight target-tracking results varied from level 1 to level 3 and from no sensitivity to PIO. These results were related to pilot technique and whether actuator rate saturation was encountered.

  3. Design of a mixer for the thrust-vectoring system on the high-alpha research vehicle

    Science.gov (United States)

    Pahle, Joseph W.; Bundick, W. Thomas; Yeager, Jessie C.; Beissner, Fred L., Jr.

    1996-01-01

    One of the advanced control concepts being investigated on the High-Alpha Research Vehicle (HARV) is multi-axis thrust vectoring using an experimental thrust-vectoring (TV) system consisting of three hydraulically actuated vanes per engine. A mixer is used to translate the pitch-, roll-, and yaw-TV commands into the appropriate TV-vane commands for distribution to the vane actuators. A computer-aided optimization process was developed to perform the inversion of the thrust-vectoring effectiveness data for use by the mixer in performing this command translation. Using this process a new mixer was designed for the HARV and evaluated in simulation and flight. An important element of the Mixer is the priority logic, which determines priority among the pitch-, roll-, and yaw-TV commands.

  4. Design Specification for a Thrust-Vectoring, Actuated-Nose-Strake Flight Control Law for the High-Alpha Research Vehicle

    Science.gov (United States)

    Bacon, Barton J.; Carzoo, Susan W.; Davidson, John B.; Hoffler, Keith D.; Lallman, Frederick J.; Messina, Michael D.; Murphy, Patrick C.; Ostroff, Aaron J.; Proffitt, Melissa S.; Yeager, Jessie C.; hide

    1996-01-01

    Specifications for a flight control law are delineated in sufficient detail to support coding the control law in flight software. This control law was designed for implementation and flight test on the High-Alpha Research Vehicle (HARV), which is an F/A-18 aircraft modified to include an experimental multi-axis thrust-vectoring system and actuated nose strakes for enhanced rolling (ANSER). The control law, known as the HARV ANSER Control Law, was designed to utilize a blend of conventional aerodynamic control effectors, thrust vectoring, and actuated nose strakes to provide increased agility and good handling qualities throughout the HARV flight envelope, including angles of attack up to 70 degrees.

  5. F-18 high alpha research vehicle surface pressures - Initial in-flight results and correlation with flow visualization and wind-tunnel data

    Science.gov (United States)

    Fisher, David F.; Banks, Daniel W.; Richwine, David M.

    1990-01-01

    Flight tests with the NASA F-18 high-alpha research vehicle (HARV) have yielded pressure distributions at angles of attack from 10 to 50 deg, at Mach 0.23 to 0.6, at five fuselage forebody stations and three on the leading-edge extensions (LEXs). Correlations are made between these data and both previously obtained HARV flow visualizations and wind tunnel model test results. The general trend is one in which the forebody's maximum suction pressure peaks increase in magnitude, after their first appearance at alpha of about 19 deg, with increasing alpha. LEX pressure-distribution trends involve the inward progression of the maximum suction peaks, an increase in the magnitude of the maximum pressure peaks up to pressure core breakdown, and the decrease and general flattening of the pressure distribution beyond the LEX primary vortex breakdown.

  6. F-18 high alpha research vehicle surface pressures: Initial in-flight results and correlation with flow visualization and wind-tunnel data

    Science.gov (United States)

    Fisher, David F.; Banks, Daniel W.; Richwine, David M.

    1990-01-01

    Pressure distributions measured on the forebody and the leading-edge extensions (LEX's) of the NASA F-18 high alpha research vehicle (HARV) were reported at 10 and 50 degree angles of attack and at Mach 0.20 to 0.60. The results were correlated with HARV flow visualization and 6-percent scale F-18 wind-tunnel-model test results. The general trend in the data from the forebody was for the maximum suction pressure peaks to first appear at an angle of attack (alpha) of approximately 19 degrees and increase in magnitude with angle of attack. The LEX pressure distribution general trend was the inward progression and increase in magnitude of the maximum suction peaks up to vortex core breakdown and then the decrease and general flattening of the pressure distribution beyond that. No significant effect of Mach number was noted for the forebody results. However, a substantial compressibility effect on the LEX's resulted in a significant reduction in vortex-induced suction pressure as Mach number increased. The forebody primary and the LEX secondary vortex separation lines, from surface flow visualization, correlated well with the end of pressure recovery, leeward and windward, respectively, of maximum suction pressure peaks. The flight to wind-tunnel correlations were generally good with some exceptions.

  7. MOTOR VEHICLE SAFETY RESEARCH METHODOLOGY

    Directory of Open Access Journals (Sweden)

    A. Stepanov

    2015-07-01

    Full Text Available The issues of vehicle safety are considered. The methodology of approach to analyzing and solving the problem of safety management of vehicles and overall traffic is offered. The distinctive features of organization and management of vehicle safety are shown. There has been drawn a conclusion that the methodological approach to solving traffic safety problems is reduced to selection and classification of safety needs.

  8. Pneumatic vehicle. Research and design

    Directory of Open Access Journals (Sweden)

    Lokodi Zsolt

    2011-12-01

    Full Text Available This experimental vehicle was designed for an international competition organized by Bosch Rexroth yearly in Hungary. The purpose of this competition is to design, build and race vehicles with a fuel source of compressed gas. The race consists of multiple events: longest run distance, the smartness track and the best acceleration event. These events test to the limit the capabilities of the designed vehicles.

  9. Research on Hybrid Vehicle Drivetrain

    Science.gov (United States)

    Xie, Zhongzhi

    Hybrid cars as a solution to energy saving, emission reduction measures, have received widespread attention. Motor drive system as an important part of the hybrid vehicles as an important object of study. Based on the hybrid electric vehicle powertrain control system for permanent magnet synchronous motor as the object of study. Can be applied to hybrid car compares the characteristics of traction motors, chose permanent magnet synchronous Motors as drive motors for hybrid vehicles. Building applications in hybrid cars in MATLAB/Simulink simulation model of permanent-magnet synchronous motor speed control system and analysis of simulation results.

  10. Personal Air Vehicle Research Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The innovation is a low aspect ratio all-lifting configuration for personal air vehicles. This configuration uses an architecture fundamentally different from...

  11. Fast Charging Electric Vehicle Research & Development Project

    Energy Technology Data Exchange (ETDEWEB)

    Heny, Michael

    2014-03-31

    The research and development project supported the engineering, design and implementation of on-road Electric Vehicle (“EV”) charging technologies. It included development of potential solutions for DC fast chargers (“DCFC”) capable of converting high voltage AC power to the DC power required by EVs. Additional development evaluated solutions related to the packaging of power electronic components and enclosure design, as well as for the design and evaluation of EV charging stations. Research compared different charging technologies to identify optimum applications in a municipal fleet. This project collected EV usage data and generated a report demonstrating that EVs, when supported by adequate charging infrastructure, are capable of replacing traditional internal combustion vehicles in many municipal applications. The project’s period of performance has demonstrated various methods of incorporating EVs into a municipal environment, and has identified three general categories for EV applications: - Short Commute: Defined as EVs performing in limited duration, routine commutes. - Long Commute: Defined as tasks that require EVs to operate in longer daily mileage patterns. - Critical Needs: Defined as the need for EVs to be ready at every moment for indefinite periods. Together, the City of Charlottesville, VA (the “City”) and Aker Wade Power Technologies, LLC (“Aker Wade”) concluded that the EV has a viable position in many municipal fleets but with limited recommendation for use in Critical Needs applications such as Police fleets. The report also documented that, compared to internal combustion vehicles, BEVs have lower vehicle-related greenhouse gas (“GHG”) emissions and contribute to a reduction of air pollution in urban areas. The enhanced integration of EVs in a municipal fleet can result in reduced demand for imported oil and reduced municipal operating costs. The conclusions indicated in the project’s Engineering Report (see

  12. Fast Charging Electric Vehicle Research & Development Project

    Energy Technology Data Exchange (ETDEWEB)

    Heny, Michael

    2014-03-31

    The research and development project supported the engineering, design and implementation of on-road Electric Vehicle (“EV”) charging technologies. It included development of potential solutions for DC fast chargers (“DCFC”) capable of converting high voltage AC power to the DC power required by EVs. Additional development evaluated solutions related to the packaging of power electronic components and enclosure design, as well as for the design and evaluation of EV charging stations. Research compared different charging technologies to identify optimum applications in a municipal fleet. This project collected EV usage data and generated a report demonstrating that EVs, when supported by adequate charging infrastructure, are capable of replacing traditional internal combustion vehicles in many municipal applications. The project’s period of performance has demonstrated various methods of incorporating EVs into a municipal environment, and has identified three general categories for EV applications: Short Commute: Defined as EVs performing in limited duration, routine commutes. - Long Commute: Defined as tasks that require EVs to operate in longer daily mileage patterns. - Critical Needs: Defined as the need for EVs to be ready at every moment for indefinite periods. Together, the City of Charlottesville, VA (the “City”) and Aker Wade Power Technologies, LLC (“Aker Wade”) concluded that the EV has a viable position in many municipal fleets but with limited recommendation for use in Critical Needs applications such as Police fleets. The report also documented that, compared to internal combustion vehicles, BEVs have lower vehicle-related greenhouse gas (“GHG”) emissions and contribute to a reduction of air pollution in urban areas. The enhanced integration of EVs in a municipal fleet can result in reduced demand for imported oil and reduced municipal operating costs. The conclusions indicated in the project’s Engineering Report (see Attachment

  13. Unmanned Aerial Vehicle Domain: Areas of Research

    Directory of Open Access Journals (Sweden)

    Kadir Alpaslan Demir

    2015-07-01

    Full Text Available Unmanned aerial vehicles (UAVs domain has seen rapid developments in recent years. As the number of UAVs increases and as the missions involving UAVs vary, new research issues surface. An overview of the existing research areas in the UAV domain has been presented including the nature of the work categorised under different groups. These research areas are divided into two main streams: Technological and operational research areas. The research areas in technology are divided into onboard and ground technologies. The research areas in operations are divided into organization level, brigade level, user level, standards and certifications, regulations and legal, moral, and ethical issues. This overview is intended to serve as a starting point for fellow researchers new to the domain, to help researchers in positioning their research, identifying related research areas, and focusing on the right issues.Defence Science Journal, Vol. 65, No. 4, July 2015, pp. 319-329, DOI: http://dx.doi.org/10.14429/dsj.65.8631

  14. Hydrodynamics Research on Amphibious Vehicle Systems: Engineering Application

    Institute of Scientific and Technical Information of China (English)

    JU Nai-jun

    2006-01-01

    Based on the modeling theoretical research of the amphibious vehicle systems, a simulation computed architecture on the state space expressions of hydrodynamics for amphibious vehicle systems are educed, and simulation computed results of navigation characteristics, vibration-impact characteristics, firing-hitting characteristics for amphibious vehicle on water are given. It is shown that the hydrodynamic research on amphibious vehicle systems is necessary and feasible.

  15. Integrated reliability program for Scout research vehicle.

    Science.gov (United States)

    Morris, B. V.; Welch, R. C.

    1967-01-01

    Integrated reliability program for Scout launch vehicle in terms of design specification, review functions, malfunction reporting, failed parts analysis, quality control, standardization and certification

  16. Research and Simulation of the Electrical Vehicle Based Dynamical System

    Directory of Open Access Journals (Sweden)

    Ko-Chun Chen

    2015-01-01

    Full Text Available This study developed a dynamic model of electric vehicle system by using the MATLAB/Simulink tool. The vehicle model comprises two system components: an electrical system and a suspension system. This study also designed various road conditions for simulating the motion of vehicle traveling along a road. The results show that the electrical and suspension system parameters can be adjusted immediately to enhance passenger comfort. The findings of this research have practical teaching applications. Students can modify the vehicle model parameters byes using the MATLAB graphical user interface, allowing them to observe the motion of vehicle under various road conditions.

  17. Hydrodynamics Research on Amphibious Vehicle Systems:Modeling Theory

    Institute of Scientific and Technical Information of China (English)

    JU Nai-jun

    2006-01-01

    For completing the hydrodynamics software development and the engineering application research on the amphibious vehicle systems, hydrodynamic modeling theory of the amphibious vehicle systems is elaborated, which includes to build up the dynamic system model of amphibious vehicle motion on water, gun tracking-aiming-firing, bullet hit and armored check-target, gunner operating control, and the simulation computed model of time domain for random sea wave.

  18. Research and development of electric vehicles for clean transportation.

    Science.gov (United States)

    Wada, Masayoshi

    2009-01-01

    This article presents the research and development of an electric vehicle (EV) in Department of Human-Robotics Saitama Institute of Technology, Japan. Electric mobile systems developed in our laboratory include a converted electric automobile, electric wheelchair and personal mobile robot. These mobile systems contribute to realize clean transportation since energy sources and devices from all vehicles, i.e., batteries and electric motors, does not deteriorate the environment. To drive motors for vehicle traveling, robotic technologies were applied.

  19. FOREBODY COMPRESSIBILITY RESEARCH OF HYPERSONIC VEHICLE

    Institute of Scientific and Technical Information of China (English)

    刘嘉; 姚文秀; 雷麦芳; 王发民

    2004-01-01

    Three kinds of forebody model of hypersonic vehicles were studied with numerical simulation method. It shows that the two-order compressive ramp model is the best selection among the three for its good evaluative parameters value at the cowl of the inlet. This model can provide higher value of flux coefficient and total pressure recovery coefficient and lower average Mach number compared with those of the other two models. Simultaneously different compressive angles may have different effects. The configuration which the firstorder of compressive angle is 4° and the second 5° is the optimum combination. Furthermore factors such as attack angle were concerned. Better result may be obtained with a range of attack angles. Based on the work above the integrated design for forebody/ inlet of a hypersonic vehicle was performed. The numerical result shows that this integrated model provides good flow field quality for inlet and engine work.

  20. Research and development of electric vehicles for clean transportation

    Institute of Scientific and Technical Information of China (English)

    WADA Masayoshi

    2009-01-01

    This article presents the research and development of an electric vehicle (EV) in Dept.of Human-Robotics Saitama Institute of Technology.Electric mobile systems developed in our laboratory include a converted electric automobile,electric wheelchair and personal mobile robot.These mobile systems contribute to realize clean transportation since energy sources and devices from all vehicles,i.e.,batteries and electric motors,does not deteriorate the environment.To drive motors for vehicle traveling,robotic technologies were applied.

  1. Research on the Interior Sound Quality in Hybrid Electric Vehicle

    Directory of Open Access Journals (Sweden)

    Liao Lian Ying

    2016-01-01

    Full Text Available Even the overall level of vehicle interior noise of hybrid electric vehicle (HEV reduced to a certain degree, the vibration and noise generated by the engine, motor, generator and power split have made greater effect on the vehicle interior sound quality in HEV. In order to research the feature of vehicle interior sound quality in HEV, the HEV is used to be the research object, the binaural noise sample of the driver when playing different kinds of music in the vehicle with the speed of sixty kilometers per hour is collected. ArtemiS is used to conduct frequency division processing, so as to obtain the relative weight of each frequency band and the overall noise. The tone, roughness and sharpness of sound quality subjective evaluation parameters are quantified, the SPSS is used to establish the linear regression model of the sample, and the best masking music tracks are found out. Then, the sound samples that contains the best music tracks and the simple vehicle interior noise are re-collected, the regression model and ArtemiS are used to predict the subjective evaluation value. The research results show that when adding the music, the tone degree rises and the lowering degree decreases, thus the disturbing degree reduces, which significantly improves the sound quality in the HEV.

  2. 25 years TNO Road-Vehicles Research Institute

    NARCIS (Netherlands)

    1995-01-01

    Since the founding of the TNO Road-Vehicles Research Institute 25years ago, the institute has managed to develop a leading position in automotive research in several disciplines. A steady growth of the institute during the first 20 years has turned into a strong growth during the last 5 years. A

  3. JUSTINA: A platform for autonomous land vehicle research and development

    Science.gov (United States)

    Juhala, Matti

    A platform for autonomous land vehicle research and development was developed. The platform makes it possible to conduct tests in natural surroundings. The platform is based on a small car, which was modified and equipped for computer control. The car is equipped with a controller area network, which makes it possible to use parallel processing. The computer system and the modifications made are described. Programs for basic image processing were written and they are tested in a simple line following application. The programs allow different image processing tasks to be done on a desktop computer using either a recorded video signal or digitized images from natural scenes. Special attention was paid to the camera calibration procedure. A simple vehicle model was created for hardware in the loop testing of image processing and vehicle control algorithms. The model uses artificially produced road images. The vehicle is equipped with a differential Global Positioning System (GPS) navigation system, which was tested on an open field application. This platform is modular and can be easily adapted for different research purposes in autonomous land vehicle development.

  4. Research of Energy Regeneration Technology in Electric Vehicle

    Institute of Scientific and Technical Information of China (English)

    陈家新; 江建中; 汪信尧

    2003-01-01

    The theory of energy regeneration in electric vehicle (EV) has been introduced in most papers, but the mathematic model of EV energy regeneration system was little studied. In this paper the mathematic model of EV energy regeneration system is studied,and then the system ability under four control strategies is analyzed. In the end the system reliability is researched, and the calcula-tion model of system reliability is proposed.

  5. The Research of Vehicle Acceleration at Signalized Intersections

    Directory of Open Access Journals (Sweden)

    Vuk Bogdanović

    2013-02-01

    Full Text Available Vehicle acceleration is an important parameter used in planning various road elements, traffic signalization, geometric elements of an intersection, signal plans of traffic lights, etc. The knowledge of vehicle acceleration values is also necessary in using simulation softwares for more accurate analysis of the total situation at an intersection, on a road section or in a traffic network. In a lot of earlier studies, acceleration values were analysed and defined, mostly in optimal conditions for traffic functioning. However, values of almost all traffic flow parameters have been changed over time, due to changes in driving-dynamic vehicle characteristics, pneumatic tyres, material used for building road surface, etc. Besides, local environment influence and changes in drivers’ behaviour also significantly affect values of this parameter. According to HCM, it is advisable to perform local research for all values of the parameters recommended within the framework of this handbook, and to adapt their values to local conditions as well. The results of measuring the values of vehicles acceleration at signalized intersections in Novi Sad, Serbia, have been shown in this paper, using the procedure based on video recording processing.

  6. Real-world vehicle emissions: a summary of the Seventeenth Coordinating Research Council On-Road Vehicle Emissions Workshop.

    Science.gov (United States)

    Cadle, Steven H; Ayala, Alberto; Black, Kevin N; Graze, R Rob; Koupal, John; Minassian, Fred; Murray, Hannah B; Natarajan, Mani; Tennant, Christopher J; Lawson, Douglas R

    2008-01-01

    The Coordinating Research Council, Inc. (CRC) held its 17th On-Road Vehicle Emissions Workshop in March 2007, where results of the most recent on-road vehicle emissions research were presented. We summarize ongoing work from researchers who are engaged in improving our understanding of the role and contribution of mobile sources to ambient air quality and emission inventories. Participants in the Workshop discussed efforts to improve mobile source emission models, light- and heavy-duty vehicle emissions measurements, on- and off-road emissions measurements, effects of fuels and lubricating oils on emissions, as well as emerging issues and topics for future research.

  7. Multi-Vehicle Cooperative Control Research at the NASA Armstrong Flight Research Center, 2000-2014

    Science.gov (United States)

    Hanson, Curt

    2014-01-01

    A brief introductory overview of multi-vehicle cooperative control research conducted at the NASA Armstrong Flight Research Center from 2000 - 2014. Both flight research projects and paper studies are included. Since 2000, AFRC has been almost continuously pursuing research in the areas of formation flight for drag reduction and automated cooperative trajectories. An overview of results is given, including flight experiments done on the FA-18 and with the C-17. Other multi-vehicle cooperative research is discussed, including small UAV swarming projects and automated aerial refueling.

  8. Man-Vehicle Systems Research Facility - Design and operating characteristics

    Science.gov (United States)

    Shiner, Robert J.; Sullivan, Barry T.

    1992-01-01

    This paper describes the full-mission flight simulation facility at the NASA Ames Research Center. The Man-Vehicle Systems Research Facility (MVSRF) supports aeronautical human factors research and consists of two full-mission flight simulators and an air-traffic-control simulator. The facility is used for a broad range of human factors research in both conventional and advanced aviation systems. The objectives of the research are to improve the understanding of the causes and effects of human errors in aviation operations, and to limit their occurrence. The facility is used to: (1) develop fundamental analytical expressions of the functional performance characteristics of aircraft flight crews; (2) formulate principles and design criteria for aviation environments; (3) evaluate the integration of subsystems in contemporary flight and air traffic control scenarios; and (4) develop training and simulation technologies.

  9. Research on biomimetic underwater vehicles for underwater ISR

    Science.gov (United States)

    Szymak, Piotr; Praczyk, Tomasz; Naus, Krzysztof; Szturomski, Bogdan; Malec, Marcin; Morawski, Marcin

    2016-05-01

    Autonomous Biomimetic Underwater Vehicles BUVs driven by an undulating propulsion are a new branch in an area of an underwater robotics. They imitate both the construction and kinematics of a motion of underwater living organisms, e.g. fishes. Such vehicles have several features crucial from the point of view of military applications, e.g. larger secrecy and potential range of operation. The paper presents results of the research on BUVs carried out within two (Polish and EDA) projects both led by Polish Naval Academy. At the beginning, the initial efforts in building Polish BUV called CyberFish are included. Then, selected results of the tests of subsystems, e.g. navigational and 3D model of BUV built within national project are described. Next, the initial research achieved in the international project are showed. At the end, the schedule of the research planned to carry out within both projects is inserted. The paper is mainly focused on the hardware development of the BUVs.

  10. Research and innovative design of a zeroemissions vehicle by multidisciplinary student teams in multi-years

    OpenAIRE

    Yee, Raymond K.; Hsu, Tai-Ran; Le, Thuy T

    2013-01-01

    This paper presents a unique learning and research experience for students from mechanical and electrical engineering majors in a course on senior design projects involving research and development, design and production of a proof-of-concept electric vehicle, the ZEM (Zero EMissions) vehicle. The ZEM vehicle combined positive aspects and latest technologies in electric vehicle design,solar-electric power conversions, and ergonomic human power into one affordable and environmentally sustainab...

  11. Research, development, and demonstration of lead-acid batteries for electric vehicle propulsion. Annual report, 1980

    Energy Technology Data Exchange (ETDEWEB)

    1981-03-01

    The progress and status of Eltra's Electric Vehicle Battery Program during FY-80 are presented under five divisional headings: Research on Components and Processes; Development of Cells and Modules for Electric Vehicle Propulsion; Sub-Systems; Pilot Line Production of Electric Vehicle Battery Prototypes; and Program Management.

  12. Vehicle to Electric Vehicle Supply Equipment Smart Grid Communications Interface Research and Testing Report

    Energy Technology Data Exchange (ETDEWEB)

    Kevin Morrow; Dimitri Hochard; Jeff Wishart

    2011-09-01

    Plug-in electric vehicles (PEVs), including battery electric, plug-in hybrid electric, and extended range electric vehicles, are under evaluation by the U.S. Department of Energy's Advanced Vehicle Testing Activity (AVTA) and other various stakeholders to better understand their capability and potential petroleum reduction benefits. PEVs could allow users to significantly improve fuel economy over a standard hybrid electric vehicles, and in some cases, depending on daily driving requirements and vehicle design, PEVs may have the ability to eliminate petroleum consumption entirely for daily vehicle trips. The AVTA is working jointly with the Society of Automotive Engineers (SAE) to assist in the further development of standards necessary for the advancement of PEVs. This report analyzes different methods and available hardware for advanced communications between the electric vehicle supply equipment (EVSE) and the PEV; particularly Power Line Devices and their physical layer. Results of this study are not conclusive, but add to the collective knowledge base in this area to help define further testing that will be necessary for the development of the final recommended SAE communications standard. The Idaho National Laboratory and the Electric Transportation Applications conduct the AVTA for the United States Department of Energy's Vehicle Technologies Program.

  13. Electric and Hybrid Vehicle System Research and Development Project: Hybrid Vehicle Potential Assessment. Volume 1. Summary

    Energy Technology Data Exchange (ETDEWEB)

    Surber, F.T.

    1979-09-30

    The results of investigations conducted under Ce Hybrid Vehicle Potential Assessment Task are reported in 10 volumes. This volume contains an overview of the study and its results. The purpose of the overall study was to determine if the petroleum fuel savings achievable through the use of hybrid electric vehicles is worth the R and D expenditures needed to develop the hybrid vehicles and to determine R and D priorities. It was concluded that by the year 2010 hybrid vehicles could replace 80% of the automotive power that would otherwise be produced from petroleum fuels; the public should not suffer any mobility loss through the use of hybrid vehicles; high initial and life-cycle costs are a limiting factor; and R and D funds should be spent for systems design and the development of low-cost batteries and controllers. (LCL)

  14. Research on the transfer learning of the vehicle logo recognition

    Science.gov (United States)

    Zhao, Wei

    2017-08-01

    The Convolutional Neural Network of Deep Learning has been a huge success in the field of image intelligent transportation system can effectively solve the traffic safety, congestion, vehicle management and other problems of traffic in the city. Vehicle identification is a vital part of intelligent transportation, and the effective information in vehicles is of great significance to vehicle identification. With the traffic system on the vehicle identification technology requirements are getting higher and higher, the vehicle as an important type of vehicle information, because it should not be removed, difficult to change and other features for vehicle identification provides an important method. The current vehicle identification recognition (VLR) is mostly used to extract the characteristics of the method of classification, which for complex classification of its generalization ability to be some constraints, if the use of depth learning technology, you need a lot of training samples. In this paper, the method of convolution neural network based on transfer learning can solve this problem effectively, and it has important practical application value in the task of vehicle mark recognition.

  15. Autonomous underwater vehicle for research and rescue operations

    CSIR Research Space (South Africa)

    Holtzhausen S

    2008-11-01

    Full Text Available Autonomous under water vehicles are ideal platforms for search and rescue operations. They can also be used for inspection of underwater terrains. These vehicles need to be autonomous and robust to cope with unpredictable current and high pressures...

  16. Research on the Aerodynamic Lift of Vehicle Windshield Wiper

    Directory of Open Access Journals (Sweden)

    Gu Zhengqi

    2016-01-01

    Full Text Available Currently, research on the aerodynamic lift of vehicle windshield wipers is confined to the steady results, and there are very few test results. In the face of this truth, a wind tunnel test is conducted by using the Multipoint Film Force Test System (MFF. In this test, the aerodynamic lift of four kinds of wiper is measured at different wind speeds and different rotation angles. And then, relevant steady-state numerical simulations are accomplished and the mechanism of the aerodynamic lift is analyzed. Furthermore, combined with dynamic meshing and user-defined functions (UDF, transient aerodynamic characteristics of wipers are obtained through numerical simulations. It is found that the aerodynamic lift takes great effect on the stability of wipers, and there is maximum value of the lift near a certain wind speed and rotation angle. The lift force when wipers are rotating with the free stream is less than steady, and the force when rotating against the free stream is greater than steady.

  17. Research on the Variable Steering Ratio of Four-Wheel-Steering Vehicle

    Institute of Scientific and Technical Information of China (English)

    林程; 陈思忠; 任良成

    2004-01-01

    The steering characteristic of a four-wheel-steering vehicle is numerically simulated for in-depth research of the handling stability of four-wheel steering. The research results show that the deteriorating tendency of the steering stability due to the increase of the vehicle speed is improved obviously in the case of four-wheel steering. The approach of variable steering ratio is discussed. The use of the variable steering ratio can not only raise the steering stability of vechicles at high vehicle speed, but also reduce the dicomfort and steering burden of drivers; and hence is helpful for the subjective evaluation of four-wheel steering vehicles.

  18. 2007 Academic Exchange Meeting for Major Research Plan "Several Key Issues Concerning the Space Vehicle"

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ The 2007 Academic Exchange Meeting for the Major Research Plan "Several Key Issues Concerning the Space Vehicle" was held in Beijing from January 14 to 15, 2008, according to NSFC Managerial Requirements for Major Research Plan.

  19. Vehicle Integrated Propulsion Research for the Study of Health Management Capabilities

    Science.gov (United States)

    Lekki, John D.; Simon, Donald L.; Hunter, Gary W.; Woike, Mary; Tokars, Roger P.

    2012-01-01

    Presentation on vehicle integrated propulsion research results and planning. This research emphasizes the testing of advanced health management sensors and diagnostics in an aircraft engine that is operated through multiple baseline and fault conditions.

  20. Research and application of genetic algorithm in path planning of logistics distribution vehicle

    Science.gov (United States)

    Wang, Yong; Zhou, Heng; Wang, Ying

    2017-08-01

    The core of the logistics distribution system is the vehicle routing planning, research path planning problem, provide a better solution has become an important issue. In order to provide the decision support for logistics and distribution operations, this paper studies the problem of vehicle routing with capacity constraints (CVRP). By establishing a mathematical model, the genetic algorithm is used to plan the path of the logistics vehicle to meet the minimum logistics and transportation costs.

  1. Unmanned air vehicle (UAV) ultra-persitence research

    Energy Technology Data Exchange (ETDEWEB)

    Dron, S. B.

    2012-03-01

    Sandia National Laboratories and Northrop Grumman Corporation Integrated Systems, Unmanned Systems (NGIS UMS) collaborated to further ultra-persistence technologies for unmanned air vehicles (UAVs). The greatest shortfalls in UAV capabilities have been repeatedly identified as (1) insufficient flight persistence or 'hang time,' (2) marginal electrical power for running higher power avionics and payload systems, and (3) inadequate communications bandwidth and reach. NGIS UMS requested support from Sandia to develop an ultra-persistent propulsion and power system (UP3S) for potential incorporation into next generation UAV systems. The team members tried to determine which energy storage and power generation concepts could most effectively push UAV propulsion and electrical power capabilities to increase UAV sortie duration from days to months while increasing available electrical power at least two-fold. Primary research and development areas that were pursued included these goals: perform general system engineering and integration analyses; develop initial thermal and electrical power estimates; provide mass, volume, dimensional, and balance estimates; conduct preliminary safety assessments; assess logistics support requirements; perform, preliminary assessments of any security and safeguards; evaluate options for removal, replacement, and disposition of materials; generally advance the potential of the UP3S concept. The effort contrasted and compared eight heat sources technologies, three power conversion, two dual cycle propulsion system configurations, and a single electrical power generation scheme. Overall performance, specific power parameters, technical complexities, security, safety, and other operational features were successfully investigated. Large and medium sized UAV systems were envisioned and operational flight profiles were developed for each concept. Heat source creation and support challenges for domestic and expeditionary operations were

  2. Experimental Research on Jerk Characteristics of Tracked Vehicles at Starting Phase

    Institute of Scientific and Technical Information of China (English)

    LIU Hai-ou; CHEN Hui-yan; ZHAI Yong

    2005-01-01

    Based on detailed analysis of vehicle dynamics, the theoretical jerk characteristics of tracked vehicles at starting phase are expressed. The experimental research on jerk characteristics under different control parameters is carried out during main clutch engaging process of AMT vehicles in terms of acceleration measurement. The test results show jerk calculated from acceleration signal is convincing and basically consistent with the subjective feeling of passengers. And the test results have practical value for the objective evaluation and the improvement of starting smoothness of AMT vehicles.

  3. The research of controller area network on hybrid electrical vehicle

    Institute of Scientific and Technical Information of China (English)

    Wu Hongxing; Song Liwei; Kou Baoquan; Cheng Shukang

    2006-01-01

    It is of increasing importance to design and implement vehicle networks for transferring information between electrical control units on Hybrid Electrical Vehicle (HEV). This paper presents a scheme of using Controller Area Network (CAN) technology to realize communication and datasharing between the electrical units on the HEV. The principle and communication protocol of Electrical Control Units (ECU) CAN node are introduced. By considering different sensitivity of the devices to the latency of data transportation, a new design procedure is proposed for the purpose of simplifying network codes and wiring harness, reducing assembly space and weight, improving assembly efficiency, and enhancing fault-diagnose in auto networks.

  4. An Unmanned Tracked Vehicle for Snow Research Applications

    Directory of Open Access Journals (Sweden)

    R.K. Das

    2016-12-01

    Full Text Available Lightweight robotic vehicles can be designed for over-snow mobility to carry out a variety of snow and glacier related studies like carrying out GPR survey of cracks & crevasses over ice crusts that cannot support foot travel, for collecting snow samples and carrying out sub-surface experiments with penetrometers on terrain that are dangerous for human, GPS mapping of avalanche debris etc. Sinkage, resistance to snow compaction, loss of traction and ingestion of snow into the driving system are some of the challenges that an unmanned lightweight tracked vehicle faces in snowbound terrain. In present work, a lightweight and unmanned remotely operated vehicle (ROV is conceptualized and developed as a technological solution. In this paper design and features of this vehicle, named HimBot, are presented along with the results obtained from tests carried over snow at Solang Nullah field observatory of SASE in February 2013. The outcome of this work will help in developing an optimized design of an ROV for over snow mobility for a variety of applications.

  5. Propulsion system research and development for electric and hybrid vehicles

    Science.gov (United States)

    Schwartz, H. J.

    1980-01-01

    An approach to propulsion subsystem technology is presented. Various tests of component reliability are described to aid in the production of better quality vehicles. component characterization work is described to provide engineering data to manufacturers on component performance and on important component propulsion system interactions.

  6. Packet radio data link applications in the NASA Langley Research Center Transport Systems Research Vehicle

    Science.gov (United States)

    Easley, Wesley C.; Carter, Donald; Mcluer, David G.

    1994-01-01

    An amateur packet radio system operating in the very high frequency (VHF) range has been implemented in the Transport Systems Research Vehicle at the NASA Langley Research Center to provide an economical, bidirectional, real-time, ground-to-air data link. The packet system has been used to support flight research involving air traffic control (ATC), differential global positioning systems (DGPS), and windshear terminal doppler weather radar (TDWR). A data maximum rate of 2400 baud was used. Operational reliability of the packet system has been very good. Also, its versatility permits numerous specific configurations. These features, plus its low cost, have rendered it very satisfactory for support of data link flight experiments that do not require high data transfer rates.

  7. Research of safety message quality characteristics in inter-vehicle communication

    OpenAIRE

    2013-01-01

    The dissertation investigates communication quality issues in Vehicular Ad-hoc Network (VANET) using statistical analysis, experimental measurements, simulations and modelling. The Object of research is quality characteristics of Inter-Vehicle communication, which is based on IEEE 802.11p standard. The main objective of current research is to investigate Inter-Vehicle communication quality characteristics: packet loss and delay. Additionally propose a redundant safety message transmission met...

  8. Advanced underground Vehicle Power and Control: The locomotive Research Platform

    Energy Technology Data Exchange (ETDEWEB)

    Vehicle Projects LLC

    2003-01-28

    Develop a fuelcell mine locomotive with metal-hydride hydrogen storage. Test the locomotive for fundamental limitations preventing successful commercialization of hydride fuelcells in underground mining. During Phase 1 of the DOE-EERE sponsored project, FPI and its partner SNL, completed work on the development of a 14.4 kW fuelcell power plant and metal-hydride energy storage. An existing battery-electric locomotive with similar power requirements, minus the battery module, was used as the base vehicle. In March 2001, Atlas Copco Wagner of Portland, OR, installed the fuelcell power plant into the base vehicle and initiated integration of the system into the vehicle. The entire vehicle returned to Sandia in May 2001 for further development and integration. Initial system power-up took place in December 2001. A revision to the original contract, Phase 2, at the request of DOE Golden Field Office, established Vehicle Projects LLC as the new prime contractor,. Phase 2 allowed industry partners to conduct surface tests, incorporate enhancements to the original design by SNL, perform an extensive risk and safety analysis, and test the fuelcell locomotive underground under representative production mine conditions. During the surface tests one of the fuelcell stacks exhibited reduced power output resulting in having to replace both fuelcell stacks. The new stacks were manufactured with new and improved technology resulting in an increase of the gross power output from 14.4 kW to 17 kW. Further work by CANMET and Hatch Associates, an engineering consulting firm specializing in safety analysis for the mining industry, both under subcontract to Vehicle Projects LLC, established minimum requirements for underground testing. CANMET upgraded the Programmable Logic Control (PLC) software used to monitor and control the fuelcell power plant, taking into account locomotive operator's needs. Battery Electric, a South Africa manufacturer, designed and manufactured (at no cost

  9. Thirty years of research and development of air cushion vehicles

    Science.gov (United States)

    Bertelsen, William R.

    This paper describes the conception of the air cushion vehicle (ACV) from experiments with the ground effect of a VTOL aircraft model. Then it describes the evolution of the ultimate ACV drive system through building and testing many models and 16 full-scale ACV to arrive at complete controllability. Adequate control of the frictionless craft, which are without inherent yaw stability, requires control force of the order of magnitude of propulsion. The derived gimbal fans provide such control force in the form of direct thrust, which is instantly available in any of 360 degrees, meterable, instantly cancelable, and reversible.

  10. Research on Fuzzy Control for Automatic Transmission of Tracked Vehicles

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A principle of fuzzy control for tracked vehicles is proposed to make its automatic transmission system be able to adapt complex running conditions, and a model of its power train is established to be used in simulation. Based on the fuzzy control method, a fuzzy shift control system composed of a basic shift strategy and a fuzzy modification module is developed to improve the dynamic characteristics and cross-country maneuverability. Simulation results show that the fuzzy shift strategy can improve the shift quality under manifold driving conditions and avoid cycled shift effectively. Therefore,the proposed fuzzy shift strategies are proved to be feasible and practicable.

  11. Research on Underwater Vehicle Based on Multiphase Flow Control

    Directory of Open Access Journals (Sweden)

    Zhang Xiaoshi

    2015-01-01

    Full Text Available The commercial software ANSYS CFX is used for modeling the hydrodynamic characteristics of submarine-launched vehicle. In the numerical simulations, the SST (Shear Stress Transport turbulence model is employed to describe the turbulence phenomenon occurring in the continuous fluid. The Rayleigh-Plesset equations are applied to analyze the cavitation phenomenon. Three-dimensional numerical simulation was carried out to study the cavity shape, the surface pressure distribution and the drag force with different flow control. The result shows that the gas and the number of ventilation holes control to show any significant impact on the cavity shape and the surface pressure are effective measures to decrease resistance.

  12. Research on Joint Handoff Algorithm in Vehicles Networks

    Directory of Open Access Journals (Sweden)

    Yuming Bi

    2016-01-01

    Full Text Available With the communication services evolution from the fourth generation (4G to the fifth generation (5G, we are going to face diverse challenges from the new network systems. On the one hand, seamless handoff is expected to integrate universal access among various network mechanisms. On the other hand, a variety of 5G technologies will complement each other to provide ubiquitous high speed wireless connectivity. Because the current wireless network cannot support the handoff among Wireless Access for Vehicular Environment (WAVE, WiMAX, and LTE flexibly, the paper provides an advanced handoff algorithm to solve this problem. Firstly, the received signal strength is classified, and the vehicle speed and data rate under different channel conditions are optimized. Then, the optimal network is selected for handoff. Simulation results show that the proposed algorithm can well adapt to high speed environment, guarantee flexible and reasonable vehicles access to a variety of networks, and prevent ping-pong handoff and link access failure effectively.

  13. Research progress on thermal protection materials and structures of hypersonic vehicles

    Institute of Scientific and Technical Information of China (English)

    YANG Ya-zheng; YANG Jia-ling; FANG Dai-ning

    2008-01-01

    Hypersonic vehicles represent future trends of military equipments and play an important role in future war. Thermal protection materials and structures, which relate to the safety of hypersonic vehicles, are one of the most key techniques in design and manufacture of hypersonic vehicles. Among these materials and structures, such as metallic temperature protection structure, the temperature ceramics and carbon/carbon composites are usually adopted in design. The recent progresses of research and applica- tion of ultra-high temperature materials in preparation, oxidation resistance, mechanical and physical characterization are summarized.

  14. Research on Adaptive Dual-Mode Switch Control Strategy for Vehicle Maglev Flywheel Battery

    Directory of Open Access Journals (Sweden)

    Hui Gao

    2015-01-01

    Full Text Available Because of the jamming signal is real-time changeable and control algorithm cannot timely tracking control flywheel rotor, this paper takes vehicle maglev flywheel battery as the research object. One kind of dual-model control strategy is developed based on the analysis of the vibration response impact of the flywheel battery control system. In view of the complex foundation vibration problems of electric vehicles, the nonlinear dynamic simulation model of vehicle maglev flywheel battery is solved. Through analyzing the nonlinear vibration response characteristics, one kind of dual-mode adaptive hybrid control strategy based on H∞ control and unbalance displacement feed-forward compensation control is presented and a real-time switch controller is designed. The reliable hybrid control is implemented, and the stability in the process of real-time switch is solved. The results of this project can provide important basic theory support for the research of vehicle maglev flywheel battery control system.

  15. Recent advances in research on unmanned aerial vehicles

    CERN Document Server

    Wang, Le; Yin, George

    2013-01-01

    A team of launched and coordinated Unmanned aerial vehicles (UAVs), requires advanced technologies in sensing, communication, computing, and control to improve their intelligence and robustness towards autonomous operations. To enhance reliability, robustness, and mission capability of a team of UAVs, a system-oriented and holistic approach is desirable in which all components and subsystems are considered in terms of their roles and impact on the entire system.  This volume aims to summarize the recent progress, identify challenges and opportunities, and develop new methodologies and systems on coordinated UAV control. A group of experts working in this area have contributed to this volume in several related aspects of autonomous control of networked UAVs. Their papers introduce new control methodologies, algorithms, and systems that address several important issues in developing intelligent, autonomous or semi-autonomous, networked systems for the next generation of UAVs. The papers share a common focus on...

  16. 77 FR 43416 - ITS Industry Forum on Connected Vehicles: Moving From Research Towards Implementation; Notice of...

    Science.gov (United States)

    2012-07-24

    ... ITS Industry Forum on Connected Vehicles: Moving From Research Towards Implementation; Notice of Public Meeting AGENCY: ITS Joint Program Office, Research and Innovative Technology Administration, U.S... Transportation System Joint Program Office (ITS JPO) will host a free public meeting and webinar to...

  17. Small UAV Research and Evolution in Long Endurance Electric Powered Vehicles

    Science.gov (United States)

    Logan, Michael J.; Chu, Julio; Motter, Mark A.; Carter, Dennis L.; Ol, Michael; Zeune, Cale

    2007-01-01

    This paper describes recent research into the advancement of small, electric powered unmanned aerial vehicle (UAV) capabilities. Specifically, topics include the improvements made in battery technology, design methodologies, avionics architectures and algorithms, materials and structural concepts, propulsion system performance prediction, and others. The results of prototype vehicle designs and flight tests are discussed in the context of their usefulness in defining and validating progress in the various technology areas. Further areas of research need are also identified. These include the need for more robust operating regimes (wind, gust, etc.), and continued improvement in payload fraction vs. endurance.

  18. An adaptable, low cost test-bed for unmanned vehicle systems research

    Science.gov (United States)

    Goppert, James M.

    2011-12-01

    An unmanned vehicle systems test-bed has been developed. The test-bed has been designed to accommodate hardware changes and various vehicle types and algorithms. The creation of this test-bed allows research teams to focus on algorithm development and employ a common well-tested experimental framework. The ArduPilotOne autopilot was developed to provide the necessary level of abstraction for multiple vehicle types. The autopilot was also designed to be highly integrated with the Mavlink protocol for Micro Air Vehicle (MAV) communication. Mavlink is the native protocol for QGroundControl, a MAV ground control program. Features were added to QGroundControl to accommodate outdoor usage. Next, the Mavsim toolbox was developed for Scicoslab to allow hardware-in-the-loop testing, control design and analysis, and estimation algorithm testing and verification. In order to obtain linear models of aircraft dynamics, the JSBSim flight dynamics engine was extended to use a probabilistic Nelder-Mead simplex method. The JSBSim aircraft dynamics were compared with wind-tunnel data collected. Finally, a structured methodology for successive loop closure control design is proposed. This methodology is demonstrated along with the rest of the test-bed tools on a quadrotor, a fixed wing RC plane, and a ground vehicle. Test results for the ground vehicle are presented.

  19. Research Experience with a Plug-In Hybrid Electric Vehicle: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Markel, T.; Pesaran, A.; Kelly, K.; Thornton, M.; Nortman, P.

    2007-12-01

    This technical document reports on the exploratory research conducted by NREL on PHEV technology using a Toyota Prius that has been converted to a plug-in hybrid electric vehicle. The data includes both controlled dynamometer and on-road test results, particularly for hilly driving. The results highlight the petroleum savings and benefits of PHEV technology.

  20. Electric and Hybrid Vehicle System Research and Development Project: Hybrid Vehicle Potential Assessment. Volume VI. Cost analysis

    Energy Technology Data Exchange (ETDEWEB)

    Hardy, K.S.

    1979-09-30

    The purpose of the cost analysis is to determine the economic feasibility of a variety of hybrid vehicles with respect to conventional vehicles specifically designed for the same duty cycle defined by the mission analysis. Several different hybrid configurations including parallel, parallel-flywheel, and series vehicles were evaluated. The ramifications of incorporating examples of advanced batteries, these being the advanced lead-acid, nickel-zinc, and sodium sulfur were also investigated. Vehicles were specifically designed with these batteries and for the driving cycles specified by the mission. Simulated operation on the missions yielded the energy consumption (petroleum and/or electricity) over the driving cycles. It was concluded that: in the event that gasoline prices reach $2.50 to $3.00/gal, hybrid vehicles in many applications will become economically competitive with conventional vehicles without subsidization; in some commercial applications hybrid vehicles could be economically competitive, when the gasoline price ranges from $1.20 to $1.50/gal. The cost per kWh per cycle of the advanced batteries is much more important economically than the specific energy; the series hybrid vehicles were found to be more expensive in comparison to the parallel or parallel-flywheel hybrids when designed as passenger vehicles; and hybrid vehicles designed for private use could become economically competitive and displace up to 50% of the fuel normally used on that mission if subsidies of $500 to $2000 were supplied to the owner/operator. (LCL)

  1. Special Form Testing of Sealed Source Encapsulation for High-Alpha-Activity Actinide Materials

    Energy Technology Data Exchange (ETDEWEB)

    Martinez, Oscar A [ORNL

    2016-01-01

    In the United States all transportation of radioactive material is regulated by the U.S. Department of Transportation (DOT). Beginning in 2008 a new type of sealed-source encapsulation package was developed and tested by Oak Ridge National Laboratory (ORNL). These packages contain high-alpha-activity actinides and are regulated and transported in accordance with the requirements for DOT Class 7 hazardous material. The DOT provides specific regulations pertaining to special form encapsulation designs. The special form designation indicates that the encapsulated radioactive contents have a very low probability of dispersion even when subjected to significant structural events. The special form designs have been shown to simplify the delivery, transport, acceptance, and receipt processes. It is intended for these sealed-source encapsulations to be shipped to various facilities making it very advantageous for them to be certified as special form. To this end, DOT Certificates of Competent Authority (CoCAs) have been sought for the design suitable for containing high-alpha-activity actinide materials. This design consists of the high-alpha-activity material encapsulated within a triangular zirconia canister, referred to as a ZipCan, tile that is then enclosed by a spherical shell. The spherical shell design, with ZipCan tile inside, was tested for compliance with the special form regulations found in 49 CFR 173.469. The spherical enclosure was subjected to 9-m impact, 1 m percussion, and 10-minute thermal tests at the Packaging Evaluation Facility located at the National Transportation Research Center in Knoxville, TN USA and operated by ORNL. Before and after each test, the test units were subjected to a helium leak check and a bubble test. The ZipCan tiles and core were also subjected to the tests required for ISO 2919:2012(E), including a Class IV impact test and heat test and subsequently subjected to helium leakage rate tests [49 CFR 173.469(a)(4)(i)]. The impact

  2. Conceptual Design and Cost Estimate of a Subsonic NASA Testbed Vehicle (NTV) for Aeronautics Research

    Science.gov (United States)

    Nickol, Craig L.; Frederic, Peter

    2013-01-01

    A conceptual design and cost estimate for a subsonic flight research vehicle designed to support NASA's Environmentally Responsible Aviation (ERA) project goals is presented. To investigate the technical and economic feasibility of modifying an existing aircraft, a highly modified Boeing 717 was developed for maturation of technologies supporting the three ERA project goals of reduced fuel burn, noise, and emissions. This modified 717 utilizes midfuselage mounted modern high bypass ratio engines in conjunction with engine exhaust shielding structures to provide a low noise testbed. The testbed also integrates a natural laminar flow wing section and active flow control for the vertical tail. An eight year program plan was created to incrementally modify and test the vehicle, enabling the suite of technology benefits to be isolated and quantified. Based on the conceptual design and programmatic plan for this testbed vehicle, a full cost estimate of $526M was developed, representing then-year dollars at a 50% confidence level.

  3. Charge It! Translating Electric Vehicle Research Results to Engage 7th and 8th Grade Girls

    Science.gov (United States)

    Egbue, Ona; Long, Suzanna; Ng, Ean-Harn

    2015-10-01

    Despite attempts to generate interest in science and technology careers, US students continue to show reduced interest in science, technology, engineering and mathematics (STEM) majors at the collegiate level. If girls are not engaged in STEM learning by the middle school level, studies show that they are even less likely to choose a science- or engineering-related major. This article presents results from a workshop for 7th and 8th grade girls designed to promote knowledge building in the area of sustainability and alternative energy use in transportation and to stimulate greater interest in STEM subjects. The workshop based on research conducted at University X focused on basic concepts of electric vehicles and electric vehicles' batteries. Tests were conducted to evaluate the students' knowledge and perceptions of electric vehicles and to determine the impact of the workshop. Early exposure to meaningful engineering experiences for these young girls may boost interest and the eventual pursuit of engineering and technology education paths.

  4. Driving Control Research for Longitudinal Dynamics of Electric Vehicles with Independently Driven Front and Rear Wheels

    Directory of Open Access Journals (Sweden)

    Wei Liu

    2013-01-01

    Full Text Available This paper takes the electric off-road vehicle with separated driven axles as the research object. To solve the longitudinal dynamics driving control problems, vehicle dynamics model, and control strategies were studied and the corresponding simulation was carried out. An 8-DOF vehicle dynamics model with separated driven axles was built. The driving control strategies on the typical roads were put forward. The recognition algorithm of the typical road surfaces based on the wheels’ slip rates was proposed. And the two control systems were designed including the pedal opening degree adjustment control system based on PI algorithm and the interaxle torque distribution control system based on sliding mode control algorithm. The driving control flow of the proposed vehicle combining the pedal adjustment control system with the interaxle torque distribution control system was developed. And the driven control strategies for the typical roads were simulated. Simulation results show that the proposed drive control strategies can adapt to different typical road surfaces, limit the slip rates of the driving wheels within the stable zone, and ensure the vehicle driving safely and stably in accordance with the driver's intention.

  5. Test analysis and research on static choice reaction ability of commercial vehicle drivers

    Science.gov (United States)

    Zhang, Lingchao; Wei, Lang; Qiao, Jie; Tian, Shun; Wang, Shengchang

    2017-03-01

    Drivers' choice reaction ability has a certain relation with safe driving. It has important significance to research its influence on traffic safety. Firstly, the paper uses a choice reaction detector developed by research group to detect drivers' choice reaction ability of commercial vehicles, and gets 2641 effective samples. Then by using mathematical statistics method, the paper founds that average reaction time from accident group has no difference with non-accident group, and then introduces a variance rate of reaction time as a new index to replace it. The result shows that the test index choice reaction errors and variance rate of reaction time have positive correlations with accidents. Finally, according to testing results of the detector, the paper formulates a detection threshold with four levels for helping transportation companies to assess commercial vehicles drivers.

  6. Impact of digital systems technology on man-vehicle systems research

    Science.gov (United States)

    Bretoi, R. N.

    1983-01-01

    The present study, based on a NASA technology assessment, examines the effect of new technologies on trends in crew-systems design and their implications from the vantage point of man-vehicle systems research. Those technologies that are most relevant to future trends in crew-systems design are considered along with problems associated with the introduction of rapidly changing technologies and systems concepts from a human-factors point of view. The technologies discussed include information processing, displays and controls, flight and propulsion control, flight and systems management, air traffic control, training and simulation, and flight and resource management. The historical evolution of cockpit systems design is used to illustrate past and possible future trends in man-vehicle systems research.

  7. RESEARCH AND DEVELOPMENT OF VIRTUAL PROTOTYPE OF RUNNING GEARS FOR RAILWAY VEHICLE

    Institute of Scientific and Technical Information of China (English)

    ZOU Yisheng; DING Guofu; ZHANG Weihua; XU Mingheng; HE Yong

    2008-01-01

    Virtual prototype is an important idea to resolve design problems of railway vehicle. A different development method, which is based on national product and autonomous development, and would like to reflect the specialty of railway vehicle development in China, is presented. According to the developing process of railway vehicle, the research contents and developing method are pointed out. The integration between CAD and performance analysis software on dynamics and strength is mainly considered. In CAD environment, the properties for dynamics computing are extracted directly from the model and exported with model. This method can avoid data losing caused by model rebuilding in CAE software, and increase the direct dependence of product CAD. Then the vehicle model with properties will be used for real-time dynamics and kinematics analysis and simulation. Therefore, the strength of the parts can be analyzed. The results of dynamics and strength analysis will be fed back to optimize the design model. All operations are dispatched by a control platform, and all data are managed according to the principle of PDM. Testing results show this method is correct.

  8. 77 FR 20872 - Enabling a Secure Environment for Vehicle-to-Infrastructure Research Workshop; Notice of Public...

    Science.gov (United States)

    2012-04-06

    ... Enabling a Secure Environment for Vehicle-to-Infrastructure Research Workshop; Notice of Public Meeting... Joint Program Office (ITS JPO) will hold a free public meeting on the Vehicle-to-Infrastructure (V2I...://www.itsa.org/v2i . This public meeting is being held in support of the V2I for Safety Program...

  9. Best practice for minimising unmanned aerial vehicle disturbance to wildlife in biological field research.

    Science.gov (United States)

    Hodgson, Jarrod C; Koh, Lian Pin

    2016-05-23

    The use of unmanned aerial vehicles (UAVs), colloquially referred to as 'drones', for biological field research is increasing [1-3]. Small, civilian UAVs are providing a viable, economical tool for ecology researchers and environmental managers. UAVs are particularly useful for wildlife observation and monitoring as they can produce systematic data of high spatial and temporal resolution [4]. However, this new technology could also have undesirable and unforeseen impacts on wildlife, the risks of which we currently have little understanding [5-7]. There is a need for a code of best practice in the use of UAVs to mitigate or alleviate these risks, which we begin to develop here.

  10. A Coupling Vibration Test Bench and the Simulation Research of a Maglev Vehicle

    Directory of Open Access Journals (Sweden)

    Weihua Ma

    2015-01-01

    Full Text Available To study the characteristics of the coupling vibration between a maglev vehicle and its track beam system and to improve the performance of the levitation system, a new type of vibration test bench was developed. Take a single maglev frame as the study object; simulation of the coupling vibration of the maglev vehicle, levitation system, and track beam were achieved. In addition, all types of real track irregularity excitations can be simulated using hydraulic actuators of the test bench. To expand the research scope, a simulation model was developed that can conduct the simulation research synergistically with the test bench. Based on a dynamics model of the test bench, the dynamics simulation method determined the influence on the levitation control performance of three factors: the track beam support stiffness, the track beam mass, and the track irregularity. The vibration resonance phenomenon of the vehicle/track system was reproduced by the dynamics simulation, and a portion of the simulation results were validated by the test results. By combining the test bench and the dynamics model, experiments can be guided by the simulation results, and the experimental results can validate the dynamics simulation results.

  11. Research on the Effects of Hydropneumatic Parameters on Tracked Vehicle Ride Safety Based on Cosimulation

    Directory of Open Access Journals (Sweden)

    Shousong Han

    2017-01-01

    Full Text Available Ride safety of a tracked vehicle is the key focus of this research. The factors that affect the ride safety of a vehicle are analyzed and evaluation parameters with their criteria are proposed. A multibody cosimulation approach is used to investigate the effects of hydropneumatic parameters on the ride safety and aid with design optimization and tuning of the suspension system. Based on the cosimulation environment, the vehicle multibody dynamics (MBD model and the road model are developed using RecurDyn, which is linked to the hydropneumatic suspension model developed in Lab AMESim. Test verification of a single suspension unit is accomplished and the suspension parameters are implemented within the hydropneumatic model. Virtual tests on a G class road at different speeds are conducted. Effects of the accumulator charge pressure, damping diameter, and the track tensioning pressure on the ride safety are analyzed and quantified. This research shows that low accumulator charge pressure, improper damping diameter, and insufficient track tensioning pressure will deteriorate the ride safety. The results provide useful references for the optimal design and control of the parameters of a hydropneumatic suspension.

  12. Thermal management in heavy vehicles : a review identifying issues and research requirements.

    Energy Technology Data Exchange (ETDEWEB)

    Wambsganss, M. W.

    1999-01-15

    Thermal management in heavy vehicles is cross-cutting because it directly or indirectly affects engine performance, fuel economy, safety and reliability, engine/component life, driver comfort, materials selection, emissions, maintenance, and aerodynamics. It follows that thermal management is critical to the design of large (class 6-8) trucks, especially in optimizing for energy efficiency and emissions reduction. Heat rejection requirements are expected to increase, and it is industry's goal to develop new, innovative, high-performance cooling systems that occupy less space and are lightweight and cost-competitive. The state of the art in heavy vehicle thermal management is reviewed, and issues and research areas are identified.

  13. Research and technology goals and objectives for Integrated Vehicle Health Management (IVHM)

    Science.gov (United States)

    1992-01-01

    Integrated Vehicle Health Management (IVHM) is defined herein as the capability to efficiently perform checkout, testing, and monitoring of space transportation vehicles, subsystems, and components before, during, and after operational This includes the ability to perform timely status determination, diagnostics, and prognostics. IVHM must support fault-tolerant response including system/subsystem reconfiguration to prevent catastrophic failures; and IVHM must support the planning and scheduling of post-operational maintenance. The purpose of this document is to establish the rationale for IVHM and IVHM research and technology planning, and to develop technical goals and objectives. This document is prepared to provide a broad overview of IVHM for technology and advanced development activities and, more specifically, to provide a planning reference from an avionics viewpoint under the OAST Transportation Technology Program Strategic Plan.

  14. Research on industrialization of electric vehicles with its demand forecast using exponential smoothing method

    Directory of Open Access Journals (Sweden)

    Zhanglin Peng

    2015-04-01

    Full Text Available Purpose: Electric vehicles industry has gotten a rapid development in the world, especially in the developed countries, but still has a gap among different countries or regions. The advanced industrialization experiences of the EVs in the developed countries will have a great helpful for the development of EVs industrialization in the developing countries. This paper seeks to research the industrialization path & prospect of American EVs by forecasting electric vehicles demand and its proportion to the whole car sales based on the historical 37 EVs monthly sales and Cars monthly sales spanning from Dec. 2010 to Dec. 2013, and find out the key measurements to help Chinese government and automobile enterprises to promote Chinese EVs industrialization. Design/methodology: Compared with Single Exponential Smoothing method and Double Exponential Smoothing method, Triple exponential smoothing method is improved and applied in this study. Findings: The research results show that:  American EVs industry will keep a sustained growth in the next 3 months.  Price of the EVs, price of fossil oil, number of charging station, EVs technology and the government market & taxation polices have a different influence to EVs sales. So EVs manufacturers and policy-makers can adjust or reformulate some technology tactics and market measurements according to the forecast results. China can learn from American EVs polices and measurements to develop Chinese EVs industry. Originality/value: The main contribution of this paper is to use the triple exponential smoothing method to forecast the electric vehicles demand and its proportion to the whole automobile sales, and analyze the industrial development of Chinese electric vehicles by American EVs industry.

  15. [Research on carbon reduction potential of electric vehicles for low-carbon transportation and its influencing factors].

    Science.gov (United States)

    Shi, Xiao-Qing; Li, Xiao-Nuo; Yang, Jian-Xin

    2013-01-01

    Transportation is the key industry of urban energy consumption and carbon emissions. The transformation of conventional gasoline vehicles to new energy vehicles is an important initiative to realize the goal of developing low-carbon city through energy saving and emissions reduction, while electric vehicles (EV) will play an important role in this transition due to their advantage in energy saving and lower carbon emissions. After reviewing the existing researches on energy saving and emissions reduction of electric vehicles, this paper analyzed the factors affecting carbon emissions reduction. Combining with electric vehicles promotion program in Beijing, the paper analyzed carbon emissions and reduction potential of electric vehicles in six scenarios using the optimized energy consumption related carbon emissions model from the perspective of fuel life cycle. The scenarios included power energy structure, fuel type (energy consumption per 100 km), car type (CO2 emission factor of fuel), urban traffic conditions (speed), coal-power technologies and battery type (weight, energy efficiency). The results showed that the optimized model was able to estimate carbon emissions caused by fuel consumption more reasonably; electric vehicles had an obvious restrictive carbon reduction potential with the fluctuation of 57%-81.2% in the analysis of six influencing factors, while power energy structure and coal-power technologies play decisive roles in life-cycle carbon emissions of electric vehicles with the reduction potential of 78.1% and 81.2%, respectively. Finally, some optimized measures were proposed to reduce transport energy consumption and carbon emissions during electric vehicles promotion including improving energy structure and coal technology, popularizing energy saving technologies and electric vehicles, accelerating the battery R&D and so on. The research provides scientific basis and methods for the policy development for the transition of new energy vehicles

  16. Communications and Control for Enhanced Autonomy in Underwater Vehicles for Deep Oceanographic Research

    Science.gov (United States)

    Jakuba, M.; Kinsey, J. C.; Yoerger, D. R.; Whitcomb, L. L.; Camilli, R.; Murphy, C.; Bowen, A.; German, C. R.

    2010-12-01

    NASA’s Astrobiology Science and Technology for Exploring Planets (ASTEP) program is a science-driven program to produce advances in scientific and technological capabilities for planetary exploration. Oceanographic robotic vehicles and planetary exploration robots have proven to be highly effective scientific tools for performing scientific research in remote, extreme, and hostile environments that preclude direct human presence. In both domains, the planets and the world’s oceans, human oversight of remote robotic exploration can dramatically enhance scientific return in comparison to purely pre-planned missions by combining the perception, intelligence, and domain knowledge of the human operators with the super-human physical and sensory capabilities of robots. The degree of human oversight, however, is restricted in sea and space by physical limits on the bandwidth and time delay of communications between human operators and remote robotic platforms. Enhanced robotic autonomy can alleviate this obstacle. We present a communications and control architecture for underwater oceanographic robot vehicles that has permitted us to introduce elements of enhanced autonomy into operations with the Woods Hole Oceanographic Institution's Autonomous Underwater Vehicles (AUVs) Nereus and Sentry. Our architecture is designed to facilitate: (1) autonomous distillation of scientific data and transmission of salient synopses from the remote vehicle to its human operators; (2) high-level near real-time human supervision and control of mission programming; (3) semi-supervised learning of environmental models for enhanced survey and search mission effectiveness. Specific capabilities our group has demonstrated include selective data delivery via acoustic link; near real-time reprogramming of vehicle mission programs during otherwise preplanned dives; and validation of autonomous decision-making processes with human-supervision. These elements have been recently demonstrated

  17. The Jet Propulsion Laboratory Electric and Hybrid Vehicle System Research and Development Project, 1977-1984: A Review

    Science.gov (United States)

    Kurtz, D.; Roan, V.

    1985-01-01

    The JPL Electric and Hybrid Vehicle System Research and Development Project was established in the spring of 1977. Originally administered by the Energy Research and Development Administration (ERDA) and later by the Electric and Hybrid Vehicle Division of the U.S. Department of Energy (DOE), the overall Program objective was to decrease this nation's dependence on foreign petroleum sources by developing the technologies and incentives necessary to bring electric and hybrid vehicles successfully into the marketplace. The ERDA/DOE Program structure was divided into two major elements: (1) technology research and system development and (2) field demonstration and market development. The Jet Propulsion Laboratory (JPL) has been one of several field centers supporting the former Program element. In that capacity, the specific historical areas of responsibility have been: (1) Vehicle system developments (2) System integration and test (3) Supporting subsystem development (4) System assessments (5) Simulation tool development.

  18. Research and development on transonic compressor of high pressure ratio turbocharger for vehicle internal combustion engines

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The pressure ratio required for a turbocharger centrifugal compressor increases with internal combustion engine power density. High pressure ratio causes a transonic flow field at the impeller inducer. Transonic flow narrows the stable flow range and de-teriorates stage efficiency. In this work, an advanced high pressure ratio transonic compressor was designed. The experimental results show that the maximum pressure ratio of this turbocharger is about 4.2, the maximum efficiency is above 80% and the stable flow range at the designed rotating speed is up to 34%. A turbocharger with this transonic compressor has been applied to some vehicle research actually, and improved power density by 40%.

  19. [Cell biology researches aboard the robotic space vehicles: preparation and performance].

    Science.gov (United States)

    Tairbekov, M G

    2006-01-01

    The article reviews the unique aspects of preparation and performance of cell biology experiments flown on robotic space vehicles Bion and Foton, and gives an overview of key findings in researches made under the author's leadership over the past decades. Described are the criteria of selecting test objects, and the conditions required for preparation and implementation of space and control (synchronous) experiments. The present-day status and issues of researches into cell responsivity to space microgravity and other factors are discussed. Also, potentialities of equipment designed to conduct experiments with cell cultures in vitro and populations of single-celled organisms are presented, as well as some ideas for new devices and systems. Unveiled are some circumstances inherent to the development and performance of space experiments, setting up laboratory facilities at the launch and landing site, and methods of safe transportation and storage of biosamples. In conclusion, the author puts forward his view on biospecies, equipment and areas of research aboard future space vehicles.

  20. Use of modular amphibious vehicles for conducting research in coastal zone

    Science.gov (United States)

    Zeziulin, Denis; Makarov, Vladimir; Belyaev, Alexander; Beresnev, Pavel; Kurkin, Andrey

    2016-04-01

    The project aims to create workable running systems of research complexes, moving along the bottom of coastal areas (in shallow waters) for investigation of waves, currents, sediment transport; investigation of ecosystems and biodiversity assessment of organisms; inspection and monitoring environmental conditions and anthropogenic load on nature; bathymetric studies. With all the variety of functional capabilities of modern robotic systems, possibilities of their application in the context of the study of coastal zones are extremely limited. Conducting research using aerial vehicles is limited to safety conditions of flight. Use of floating robotic systems in environmental monitoring and ecosystem research is only possible in conditions of relatively «soft» wave climate of the coastal zone. For these purposes, there are special amphibians such as remote-controlled vehicle Surf Rover [Daily, William R., Mark A. Johnson, and Daniel A. Oslecki. «Initial Development of an Amphibious ROV for Use in Big Surf.» Marine Technology Society 28.1 (1994): 3-10. Print.], mobile system MARC-1 [«The SPROV'er.» Florida Institute of Technology: Department of Marine and. Environmental Systems. Web. 05 May 2010.]. The paper describes methodological approaches to the selection of the design parameters of a new system.

  1. Expanded serial communication capability for the transport systems research vehicle laptop computers

    Science.gov (United States)

    Easley, Wesley C.

    1991-01-01

    A recent upgrade of the Transport Systems Research Vehicle (TSRV) operated by the Advanced Transport Operating Systems Program Office at the NASA Langley Research Center included installation of a number of Grid 1500 series laptop computers. Each unit is a 80386-based IBM PC clone. RS-232 data busses are needed for TSRV flight research programs, and it has been advantageous to extend the application of the Grids in this area. Use was made of the expansion features of the Grid internal bus to add a user programmable serial communication channel. Software to allow use of the Grid bus expansion has been written and placed in a Turbo C library for incorporation into applications programs in a transparent manner via function calls. Port setup; interrupt-driven, two-way data transfer; and software flow control are built into the library functions.

  2. Unmanned Aerial Vehicles for High-Throughput Phenotyping and Agronomic Research.

    Science.gov (United States)

    Shi, Yeyin; Thomasson, J Alex; Murray, Seth C; Pugh, N Ace; Rooney, William L; Shafian, Sanaz; Rajan, Nithya; Rouze, Gregory; Morgan, Cristine L S; Neely, Haly L; Rana, Aman; Bagavathiannan, Muthu V; Henrickson, James; Bowden, Ezekiel; Valasek, John; Olsenholler, Jeff; Bishop, Michael P; Sheridan, Ryan; Putman, Eric B; Popescu, Sorin; Burks, Travis; Cope, Dale; Ibrahim, Amir; McCutchen, Billy F; Baltensperger, David D; Avant, Robert V; Vidrine, Misty; Yang, Chenghai

    2016-01-01

    Advances in automation and data science have led agriculturists to seek real-time, high-quality, high-volume crop data to accelerate crop improvement through breeding and to optimize agronomic practices. Breeders have recently gained massive data-collection capability in genome sequencing of plants. Faster phenotypic trait data collection and analysis relative to genetic data leads to faster and better selections in crop improvement. Furthermore, faster and higher-resolution crop data collection leads to greater capability for scientists and growers to improve precision-agriculture practices on increasingly larger farms; e.g., site-specific application of water and nutrients. Unmanned aerial vehicles (UAVs) have recently gained traction as agricultural data collection systems. Using UAVs for agricultural remote sensing is an innovative technology that differs from traditional remote sensing in more ways than strictly higher-resolution images; it provides many new and unique possibilities, as well as new and unique challenges. Herein we report on processes and lessons learned from year 1-the summer 2015 and winter 2016 growing seasons-of a large multidisciplinary project evaluating UAV images across a range of breeding and agronomic research trials on a large research farm. Included are team and project planning, UAV and sensor selection and integration, and data collection and analysis workflow. The study involved many crops and both breeding plots and agronomic fields. The project's goal was to develop methods for UAVs to collect high-quality, high-volume crop data with fast turnaround time to field scientists. The project included five teams: Administration, Flight Operations, Sensors, Data Management, and Field Research. Four case studies involving multiple crops in breeding and agronomic applications add practical descriptive detail. Lessons learned include critical information on sensors, air vehicles, and configuration parameters for both. As the first and

  3. Outline of a small unmanned aerial vehicle (Ant-Plane) designed for Antarctic research

    Science.gov (United States)

    Funaki, Minoru; Hirasawa, Naohiko; the Ant-Plane Group

    As part of the Ant-Plane project for summertime scientific research and logistics in the coastal region of Antarctica, we developed six types of small autonomous UAVs (unmanned aerial vehicles, similar to drones; we term these vehicles ‘Ant-Planes’) based on four types of airframe. In test flights, Ant-Plane 2 cruised within 20 m accuracy along a straight course during calm weather at Sakurajima Volcano, Kyushu, Japan. During a period of strong winds (22 m/s) at Mt. Chokai, Akita Prefecture, Japan, Ant-Plane 2 maintained its course during a straight flight but deviated when turning leeward. An onboard 3-axis magneto-resistant magnetometer (400 g) recorded variations in the magnetic field to an accuracy of 10 nT during periods of calm wind, but strong magnetic noise was observed during high winds, especially head winds. Ant-Plane 4-1 achieved a continuous flight of 500 km, with a maximum flight altitude of 5690 m. The Ant-Plane can be used for various types of Antarctic research as a basic platform for airborne surveys, but further development of the techniques employed in takeoff and landing are required, as well as ready adjustment of the engine and the development of small onboard instruments with greater reliability.

  4. From research to public policy: the prevention of motor vehicle injuries, childhood drownings, and firearm violence.

    Science.gov (United States)

    Wintemute, G J

    1992-01-01

    The purpose of this article is to review the development of the modern sciences of injury epidemiology and injury prevention and to illustrate the use of applied research in formulating effective public policy. MEDLINE searches were conducted from 1966 to 1990, and bibliographies of articles thus obtained were reviewed. Fugitive sources were identified by multiple means. Motor vehicle fatality rates on a per mile driven basis have been reduced by 50% over the past 25 years, largely through attention to the road environment and design of motor vehicles. Passive restraint systems such as air bags promise further reductions. Drowning has emerged as a leading cause of death among young children. Complete pool fencing is expected to prevent many of these events. Firearm violence, particularly among young people, is rapidly increasing. Firearms are hazardous consumer products but are not addressed as such by our current regulatory structure and intervention agenda. Epidemiologic and other applied research can make important contributions to the development of public policies designed to prevent injury. Such policies often address the design and performance of hazardous products and environments and consider individual behavior change as only a secondary objective.

  5. Vehicle to Vehicle Services

    DEFF Research Database (Denmark)

    Brønsted, Jeppe Rørbæk

    2008-01-01

    , mobility, and availability of services. The dissertation consists of two parts. Part I gives an overview of service oriented architecture for pervasive computing systems and describes the contributions of the publications listed in part II. We investigate architecture for vehicular technology applications......As computing devices, sensors, and actuators pervade our surroundings, new applications emerge with accompanying research challenges. In the transportation domain vehicles are being linked by wireless communication and equipped with an array of sensors and actuators that make is possible to provide...... location aware infotainment, increase safety, and lessen environmental strain. This dissertation is about service oriented architecture for pervasive computing with an emphasis on vehicle to vehicle applications. If devices are exposed as services, applications can be created by composing a set of services...

  6. Research on Hydrodynamics Model Test for Deepsea Open-Framed Remotely Operated Vehicle

    Institute of Scientific and Technical Information of China (English)

    FAN Shi-bo; LIAN Lian; REN Ping

    2012-01-01

    This paper presents the features of newly designed hydrodynamics test for the scaled model of 4500 m deepsea open-framed remotely operated vehicle (ROV),which is being researched and developed by Shanghai Jiao Tong University.Accurate hydrodynamics coefficients measurement and spatial modeling of ROV are significant for the maneuverability and control algorithm.The scaled model of ROV was constructed by 1∶ 1.6.Hydrodynamics coefficients were measured through VPMM and LAHPMM towing test.And dynamics model was derived as a set of equations,describing nonlinear and coupled 5-DOF spatial motions.Rotation control motion was simulated to verify spatial model proposed.Research and application of hydrodynamics coefficients are expected to enable ROV to overcome uncertainty and disturbances of deepsea environment,and accomplish some more challengeable and practical missions.

  7. Electric and Hybrid Vehicle System Research and Development Project: Hybrid Vehicle Potential Assessment. Volume IV. Series systems

    Energy Technology Data Exchange (ETDEWEB)

    Popinski, Z.

    1979-09-30

    In the Hybrid Vehicle Potential Assessment Task three major powertrain configurations (parallel, parallel with flywheel, and series) were studied. An evaluation of the series configuration is presented. The series configuration has the advantage that the engine is mechanically uncoupled from the wheels and can be operated at its best economy point much of the time. The mechanical energy produced by the engine is converted through a generator into electrical energy which is used to drive the motor or charge the batteries. This configuration offers a good degree of flexibility. It has the disadvantage that substantial losses of energy occur since the mechanical energy from the engine passes through several components before being used to drive the wheels. The energy produced by the engine is reduced by the product of efficiencies of components connected in series. Trade-offs involved in the study of the series configuration were directed toward establishing the size of the engine, motor and generator to meet vehicle acceleration performance; determining what level to operate the engine, and determining when to use the battery. These results were then used in the electric range simulation.

  8. A community-based participatory research partnership to reduce vehicle idling near public schools.

    Science.gov (United States)

    Eghbalnia, Cynthia; Sharkey, Ken; Garland-Porter, Denisha; Alam, Mohammad; Crumpton, Marilyn; Jones, Camille; Ryan, Patrick H

    2013-05-01

    The authors implemented and assessed the effectiveness of a public health initiative aimed at reducing traffic-related air pollution exposure of the school community at four Cincinnati public schools. A partnership was fostered with academic environmental health researchers and community members. Anti-idling campaign materials were developed and education and training were provided to school bus drivers, students, parents, and school staff. Pledge drives and pre- and posteducation assessments were documented to measure the effectiveness of the program. After completing the educational component of the public health initiative, bus drivers (n = 397), community members (n = 53), and staff (n = 214) demonstrated significantly increased knowledge about the health effects of idling (p community-driven public health initiative can be effective in both 1) enhancing community awareness about the benefits of reducing idling vehicles and 2) increasing active participation in idling reduction. The partnership initially developed has continued to develop toward a sustainable and growing process.

  9. An Research on Electrical Vehicle'S Charge-Discharge Behavior Based on Logit Model

    Science.gov (United States)

    Xiaoyin, Wang; Junyong, Liu

    Electric Vehicle is the future trend of the automobile industry, and the energy exchanging between the electrical vehicles and the grid through the vehicle-to-grid (V2G) technology becomes possiable. V2G leads to a rapid load growth effecting the benefit of the grid, which wasn't discussed. The charge and discharge model of the electrical vehicles is discussed using the multinomial logit model based on the discrete choice theory, then preliminarily evaluates the effects of economic benefit both on the motorist and the grid. Finally, suggestions on period division and electricity pricing for charge and discharge of the electrical vehicle are given.

  10. Networking Multiple Autonomous Air and Ocean Vehicles for Oceanographic Research and Monitoring

    Science.gov (United States)

    McGillivary, P. A.; Borges de Sousa, J.; Rajan, K.

    2013-12-01

    Autonomous underwater and surface vessels (AUVs and ASVs) are coming into wider use as components of oceanographic research, including ocean observing systems. Unmanned airborne vehicles (UAVs) are now available at modest cost, allowing multiple UAVs to be deployed with multiple AUVs and ASVs. For optimal use good communication and coordination among vehicles is essential. We report on the use of multiple AUVs networked in communication with multiple UAVs. The UAVs are augmented by inferential reasoning software developed at MBARI that allows UAVs to recognize oceanographic fronts and change their navigation and control. This in turn allows UAVs to automatically to map frontal features, as well as to direct AUVs and ASVs to proceed to such features and conduct sampling via onboard sensors to provide validation for airborne mapping. ASVs can also act as data nodes for communication between UAVs and AUVs, as well as collecting data from onboard sensors, while AUVs can sample the water column vertically. This allows more accurate estimation of phytoplankton biomass and productivity, and can be used in conjunction with UAV sampling to determine air-sea flux of gases (e.g. CO2, CH4, DMS) affecting carbon budgets and atmospheric composition. In particular we describe tests in July 2013 conducted off Sesimbra, Portugal in conjunction with the Portuguese Navy by the University of Porto and MBARI with the goal of tracking large fish in the upper water column with coordinated air/surface/underwater measurements. A thermal gradient was observed in the infrared by a low flying UAV, which was used to dispatch an AUV to obtain ground truth to demonstrate the event-response capabilities using such autonomous platforms. Additional field studies in the future will facilitate integration of multiple unmanned systems into research vessel operations. The strength of hardware and software tools described in this study is to permit fundamental oceanographic measurements of both ocean

  11. The BMW hydrogen research vehicle - a forerunner of the hydrogen society

    Energy Technology Data Exchange (ETDEWEB)

    Nordheimer, R.K. [Bayerische Motoren Werke AG (BMW), Muenchen (Germany)

    1999-11-01

    BMW can look back on 20 years of research activities on hydrogen propulsion systems. Today, BMW`s automotive and drive technology is available and ready to go beyond the research phase. But the vehicles are only one part to the hydrogen world. The complete hydrogen process chain has to go into series and the corresponding infrastructure must be built up. For this purpose it is necessary to bundle the strengths of different partners and to join into an alliance. BMW is convinced that the implementation of hydrogen technology is not alone a topic of research programmes any more. It is a topic of the decision makers in industry, finance and insurance enterprises, and in international politics. In the year 2000 BMW will promote the international Hydrogen Energy Forum HYFORUM 2000, organized by the Future Energy Forum. HYFORUM 2000 offers to the international community a discussion platform. The interested industry partners, scientists, politicians, and other organizations are invited to be part of HYFORUM 2000 and BMW`s event for the implementation of the hydrogen infrastructure. (orig.)

  12. The BMW hydrogen research vehicle - a forerunner of the hydrogen society

    Energy Technology Data Exchange (ETDEWEB)

    Nordheimer, R.K. (Bayerische Motoren Werke AG (BMW), Muenchen (Germany))

    1999-01-01

    BMW can look back on 20 years of research activities on hydrogen propulsion systems. Today, BMW's automotive and drive technology is available and ready to go beyond the research phase. But the vehicles are only one part to the hydrogen world. The complete hydrogen process chain has to go into series and the corresponding infrastructure must be built up. For this purpose it is necessary to bundle the strengths of different partners and to join into an alliance. BMW is convinced that the implementation of hydrogen technology is not alone a topic of research programmes any more. It is a topic of the decision makers in industry, finance and insurance enterprises, and in international politics. In the year 2000 BMW will promote the international Hydrogen Energy Forum HYFORUM 2000, organized by the Future Energy Forum. HYFORUM 2000 offers to the international community a discussion platform. The interested industry partners, scientists, politicians, and other organizations are invited to be part of HYFORUM 2000 and BMW's event for the implementation of the hydrogen infrastructure. (orig.)

  13. Research on Stability Control Based on the Wheel Speed Difference for the AT Vehicles

    Directory of Open Access Journals (Sweden)

    Hui Jin

    2015-01-01

    Full Text Available This paper utilizes a linear two-degree-of-freedom vehicle model to calculate the nominal value of the vehicle’s nondrive-wheel speed difference and investigates methods of estimating the yaw acceleration and sideslip angular speed. A vehicular dynamic stability control system utilizing this nondrive-wheel speed difference is then developed, which can effectively improve a vehicle’s dynamic stability at a very low cost. Vehicle cornering processes on roads of different frictions and with different vehicle speeds are explored via simulation, with speed control being applied when vehicle speed is high enough to make the vehicle unstable. Driving simulator tests of vehicle cornering capacity on roads of different friction coefficients are also conducted.

  14. Smart limbed vehicles for naval applications. Part II. Relevant technologies and performance evaluation. Interim report on research work on smart vehicle concepts for military use on the ocean surface

    Energy Technology Data Exchange (ETDEWEB)

    Weisberg, A.; Wood, L.

    1976-09-30

    Research work in smart, unmanned water-traversing limbed vehicles for naval warfare applications is reported. The areas covered include prime movers, power transformers and actuators, structural considerations, physical control, joint servo-control, motion control, visual data and the ocean surface, smartness, and vehicle characterization. (TFD)

  15. Design and research on the electronic parking brake system of the medium and heavy duty vehicles

    OpenAIRE

    Wang, Hongliang; Dong, Wei; Li, Nan; Dai, Xiaoming

    2015-01-01

    Focusing on auto control of parking brake system of the medium and heavy duty vehicles, the key problems are studied including the system design and control strategies. The structure and working principle of the parking brake system of the medium and heavy duty vehicles are analyzed. The functions of EPB are proposed. The important information of the vehicle are analyzed which could influence the EPB system. The overall plan of the pneumatic EPB system is designed, which adopts the two-positi...

  16. Research on Acceleration Compensation Strategy of Electric Vehicle Based on Fuzzy Control Theory

    Science.gov (United States)

    Zhu, Tianjun; Li, Bin; Zong, Changfu; Wei, Zhicheng

    2017-09-01

    Nowadays, the driving technology of electric vehicle is developing rapidly. There are many kinds of methods in driving performance control technology. The paper studies the acceleration performance of electric vehicle. Under the premise of energy management, an acceleration power compensation method by fuzzy control theory based on driver intention recognition is proposed, which can meet the driver’s subjective feelings better. It avoids the problem that the pedal opening and power output are single correspondence when the traditional vehicle accelerates. Through the simulation test, this method can significantly improve the performance of acceleration and output torque smoothly in non-emergency acceleration to ensure vehicle comfortable and stable.

  17. Research and Development of Engine-Generator Set Control System for Tracked Vehicle Electric Transmission System

    Institute of Scientific and Technical Information of China (English)

    HUANG Ying; HUANG Qian; SUN Feng-chun; LIU Bo-lan; LIU Jia

    2007-01-01

    As an energy generating equipment, the engine-generator set supplies power to the electric transmission. Therefore, its control is one of the key technologies of electric vehicles. Based on the discussion about the demands to the engine-generator set in tracked vehicles, the detailed function of engine-generator and the control strategy are determined. The hardware and software of the control system are also developed and tested in a prototype vehicle. The experiment results show that the control system has good reliability and can satisfy the power requirements of vehicles under all operating conditions.

  18. Research on the Key Technology of Cooperative Attack for Manned Vehicle/Unmanned Aerial Vehicle%有人/无人机协同作战关键技术

    Institute of Scientific and Technical Information of China (English)

    马向玲; 雷宇曜

    2012-01-01

    After the analysis of unmanned combat aerial vehicle about its research and use in many countries, this paper gives a cooperative attack command and control system structure of manned/ unmanned aerial vehicles. According to the position and main mission, the system divided into two parts, the manned platform and unmanned platform, then the structure and function of each platform are discussed. It is analyzed that some key technologies of cooperative attack. The technologies are cooperative control technology, situation awareness, cooperative target allocation, path planning, cooperative damage assessment and intelligent decision making technology. A combat flow and information processing flow are given for a representative combat mission. Finally, the research area is proposed to address development tendency of unmanned combat aerial vehicle.%分析了无人作战飞机在各国的研究及使用情况,给出了有人/无人机协同作战指挥控制系统的结构,按照空间位置和主要完成任务的不同,将系统分为有人机、无人机两个平台,介绍了各平台的组成部分及相应的功能,归纳出协同作战所需要解决的关键技术:交互控制技术、协同态势感知、协同目标分配、协同航路规划技术、毁伤效能评估技术及智能决策技术,并且给出了一个在典型作战任务想定下的作战及信息处理流程.最后对无人作战飞机未来的发展方向进行了展望.

  19. Description of the primary flight display and flight guidance system logic in the NASA B-737 transport systems research vehicle

    Science.gov (United States)

    Knox, Charles E.

    1990-01-01

    A primary flight display format was integrated with the flight guidance and control system logic in support of various flight tests conducted with the NASA Transport Systems Research Vehicle B-737-100 airplane. The functional operation of the flight guidance mode control panel and the corresponding primary flight display formats are presented.

  20. Using Unmanned Underwater Vehicles as Research Platforms in Coastal Ocean Studies

    Institute of Scientific and Technical Information of China (English)

    HOU Weilin; Kendall L. Carder; David K. Costello; DU Keping; LIU Zhishen

    2003-01-01

    The advantages of using unmanned underwater vehicles in coastal ocean studies are emphasized. Two types of representative vehicles, remotely operated vehicle (ROV) and autonomous underwater vehicle (AUV) from University of South Florida, are discussed. Two individual modular sensor packages designed and tested for these platforms and field measurement results are also presented. The bottom classification and albedo package, BCAP, provides fast and accurate estimates of bottom albedos, along with other parameters such as in-water remote sensing reflectance. The real-time ocean bottom optical topographer, ROBOT, reveals high-resolution 3-dimentional bottom topography for target identification. Field data and results from recent Coastal Benthic Optical Properties field campaign, 1999 and 2000, are presented. Advantages and limitations of these vehicles and applications of modular sensor packages are compared and discussed.

  1. Research safety vehicle program (Phase II) specification review. Volume II. Final technical report, Jul 1975--Nov 1976

    Energy Technology Data Exchange (ETDEWEB)

    Pugliese, S.M.

    1977-02-01

    In Phase I of the Research Safety Vehicle Program (RSV), preliminary design and performance specifications were developed for a mid-1980's vehicle that integrates crashworthiness and occupant safety features with material resource conservation, economy, and producibility. Phase II of the program focused on development of the total vehicle design via systems engineering and integration analyses. As part of this effort, it was necessary to continuously review the Phase I recommended performance specification in relation to ongoing design/test activities. This document contains the results of analyses of the Phase I specifications. The RSV is expected to satisfy all of the producibility and safety related specifications, i.e., handling and stability systems, crashworthiness, occupant protection, pedestrian/cyclist protection, etc.

  2. The relationship between gasoline composition and vehicle hydrocarbon emissions: a review of current studies and future research needs.

    Science.gov (United States)

    Schuetzle, D; Siegl, W O; Jensen, T E; Dearth, M A; Kaiser, E W; Gorse, R; Kreucher, W; Kulik, E

    1994-01-01

    The purpose of this paper is to review current studies concerning the relationship of fuel composition to vehicle engine-out and tail-pipe emissions and to outline future research needed in this area. A number of recent combustion experiments and vehicle studies demonstrated that reformulated gasoline can reduce vehicle engine-out, tail-pipe, running-loss, and evaporative emissions. Some of these studies were extended to understand the fundamental relationships between fuel composition and emissions. To further establish these relationships, it was necessary to develop advanced analytical methods for the qualitative and quantitative analysis of hydrocarbons in fuels and vehicle emissions. The development of real-time techniques such as Fourier transform infrared spectroscopy, laser diode spectroscopy, and atmospheric pressure ionization mass spectrometry were useful in studying the transient behavior of exhaust emissions under various engine operating conditions. Laboratory studies using specific fuels and fuel blends were carried out using pulse flame combustors, single- and multicylinder engines, and vehicle fleets. Chemometric statistical methods were used to analyze the large volumes of emissions data generated from these studies. Models were developed that were able to accurately predict tail-pipe emissions from fuel chemical and physical compositional data. Some of the primary fuel precursors for benzene, 1,3-butadiene, formaldehyde, acetaldehyde and C2-C4 alkene emissions are described. These studies demonstrated that there is a strong relationship between gasoline composition and tail-pipe emissions. PMID:7529705

  3. RESEARCH ON GEAR SHIFTING PROCESS IN COMMAND MODE OF VEHICLE POWERTRAIN CONTROL

    Directory of Open Access Journals (Sweden)

    V. A. Kusyak

    2014-01-01

    Full Text Available The paper presents a schematic diagram of the powertrain automated control system based on dry friction clutch and manual gearbox. Mechatronic system has a modular configuration and allows to make the vehicle starting-up, low speed maneuvering and command or automatic gearshifting. Diesel engine, clutch and 10-step gearbox control is carried out at all movement modes by electronic modules when affected on mode selector, accelerator pedal and, if necessary, on brake pedal. Data exchange between electronic units is carried by SAE-J1939 protocol with a transmission rate of 250 kbit/s. Change in diesel fuel supply, clutch engagement and gearshifting take place automatically as a result of pneumatic power actuator operation by a signal from the controller to the corresponding solenoid valve or a combination thereof.Presents the results of semi-natural experiment on research of gear shifting process in the command mode of powertrain control. Transient gearshift oscillograms with various control algorithm structure have been given in the paper. The paper contains a ^iT^rative analysis of the oscillograma and a conclusion on expediency of gear shifting automation. A graphic representation of the semi-natural experiment results has been performed with the help of CoDeSys V2.3-visualization facilities.

  4. Australian Air Breathing Propulsion Research for Hypersonic, Beamed Energy-Propelled Vehicles

    Science.gov (United States)

    Froning, David

    2010-05-01

    A three year laser-propelled vehicle analysis and design investigation has been begun in June, 2009 by Faculty and graduate students at the University of Adelaide under a Grant/Cooperative Agreement Award to the University of Adelaide by the Asian Office of Aerospace Research and Development (AOARD). The major objectives of thsis investigation are: (a) development of hypersonic, air breathing "lightcraft" with innovative air inlets that enable acceptable airflow capture and combustion, and acceptable cowl-lip heating rates during hot, high-speed, high angle-of-attack hypersonic flight; (b) yest of the most promising lightcraft and inlet design in the high power laser beam that is part of the shock tunnel facility at CTO Instituto in Brazil; and (c) plan a series of laser guided and propelled flights that achieve supersonic or higher speed at the Woomera Test Facility (WTF) in South Australia—using the existing WTF launching and tracking facilities and sponsor-provided laser pointing and tracking and illumination systems.

  5. Research on Vehicle Control Technology Using Four-Wheel Independent Steering System

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The enhancement of vehicle handling stability and maneuverability through active and independent rear wheels control is presented. Firstly, the configuration of four-wheel independent steering prototype vehicle is introduced briefly. Then the concrete overall design of the electronic controllers of four wheel independent steering system (4WIS) is formulated in details. Under the control strategy of zero sideslip angle at mass center, the mathematical model of 4WIS is established to deduce the equations of separated rear wheel steering angles. According to these equations, simulation analysis for 4WIS vehicle performances is finished to show that 4WIS vehicle can improve the maneuverability greatly at low speed and increase the handling stability at high speed. Finally, the road test of 4WIS vehicle has performed to verify the correctness of simulation and show that compared with the conventional four wheel steering (4WS) vehicle, the 4WIS vehicle not only improves the kinematical harmony but also decreases steering resistance and lighten abrasion of tires.

  6. Research on identification method of heavy vehicle rollover based on hidden Markov model

    Science.gov (United States)

    Zhao, Zhiguo; Wang, Yeqin; Hu, Xiaoming; Tao, Yukai; Wang, Jinsheng

    2017-07-01

    Aiming at the problem of early warning credibility degradation as the heavy vehicle load and its center of gravity change greatly; the heavy vehicle rollover state identification method based on the Hidden Markov Model (HMM, is introduced to identify heavy vehicle lateral conditions dynamically in this paper. In this method, the lateral acceleration and roll angle are taken as the observation values of the model base. The Viterbi algorithm is used to predict the state sequence with the highest probability in the observed sequence, and the Markov prediction algorithm is adopted to calculate the state transition law and to predict the state of the vehicle in a certain period of time in the future. According to combination conditions of Double lane change and steering, applying Trucksim and Matlab trained hidden Markov model, the model is applied to the online identification of heavy vehicle rollover states. The identification results show that the model can accurately and efficiently identify the vehicle rollover state, and has good applicability. This study provides a novel method and a general strategy for active safety early warning and control of vehicles, which has reference significance for the application of the Hidden Markov theory in collision, rear-end and lane departure warning system.

  7. Research of the Influences of Input Parameters on the Result of Vehicles Collision Simulation

    Directory of Open Access Journals (Sweden)

    Vuk Bogdanović

    2012-05-01

    Full Text Available Vehicle collisions are complex processes which are determined by a large number of different parameters. The development of computer programs for simulation has made the collision analysis and reconstruction procedure easier, as well as the possibility to realise the influences of different parameters on collision processes, which was not possible while using classical methods. The quality of results of vehicle collision simulation and reconstruction is expressed by an error which is determined on the basis of the difference between vehicles stopping positions, which was obtained by the simulation of established vehicles stopping positions in real collisions. Being acquainted with the influence of collision parameters on the simulation error enables the development of more reliable models for automatic optimisation of the collision process and reduction of the number of iterations in the procedure of a collision reconstruction. Within the scope of this paper, the analysis and classification of different collision parameters have been carried out. It has been done by the degree of the influence on the error in the simulation process in the software package Virtual CRASH. Varying twenty different collision parameters on the sample of seven crash tests, their influence on the distance, trajectory and angular error has been analysed, and ten parameters with the highest level of influence (centre of gravity position from front axle of vehicle 1, restitution coefficient, collision place in longitudinal direction, collision place in transverse direction, centre of gravity height-vehicle2, centre of gravity height-vehicle1, collision angle, contact plane angle, slowing down the vehicle and vehicle movement direction have been distinguished.

  8. Development of a remote digital augmentation system and application to a remotely piloted research vehicle

    Science.gov (United States)

    Edwards, J. W.; Deets, D. A.

    1975-01-01

    A cost-effective approach to flight testing advanced control concepts with remotely piloted vehicles is described. The approach utilizes a ground based digital computer coupled to the remotely piloted vehicle's motion sensors and control surface actuators through telemetry links to provide high bandwidth feedback control. The system was applied to the control of an unmanned 3/8-scale model of the F-15 airplane. The model was remotely augmented; that is, the F-15 mechanical and control augmentation flight control systems were simulated by the ground-based computer, rather than being in the vehicle itself. The results of flight tests of the model at high angles of attack are discussed.

  9. Overview of recent endeavors on personal aerial vehicles: A focus on the US and Europe led research activities

    Science.gov (United States)

    Liu, Yaolong; Kreimeier, Michael; Stumpf, Eike; Zhou, Yaoming; Liu, Hu

    2017-05-01

    Personal aerial vehicles, an innovative transport mode to bridge the niche between scheduled airliners and ground transport, are seen by aviation researchers and engineers as a solution to provide fast urban on-demand mobility. This paper reviews recent research efforts on the personal aerial vehicle (PAV), with a focus on the US and Europe led research activities. As an extension of the programmatic level overview, several enabling technologies, such as vertical/short take-off and landing (V/STOL), automation, distributed electric propulsion, which might promote the deployment of PAVs, are introduced and discussed. Despite the dramatic innovation in PAV concept development and related technologies, some challenging issues remain, especially safety, infrastructure and public acceptance. As such, further efforts by many stakeholders are required to enable the real implementation and application of PAVs.

  10. Design and Testing of a Prototype Lunar or Planetary Surface Landing Research Vehicle (LPSLRV)

    Science.gov (United States)

    Murphy, Gloria A.

    2010-01-01

    This handbook describes a two-semester senior design course sponsored by the NASA Office of Education, the Exploration Systems Mission Directorate (ESMD), and the NASA Space Grant Consortium. The course was developed and implemented by the Mechanical and Aerospace Engineering Department (MAE) at Utah State University. The course final outcome is a packaged senior design course that can be readily incorporated into the instructional curriculum at universities across the country. The course materials adhere to the standards of the Accreditation Board for Engineering and Technology (ABET), and is constructed to be relevant to key research areas identified by ESMD. The design project challenged students to apply systems engineering concepts to define research and training requirements for a terrestrial-based lunar landing simulator. This project developed a flying prototype for a Lunar or Planetary Surface Landing Research Vehicle (LPSRV). Per NASA specifications the concept accounts for reduced lunar gravity, and allows the terminal stage of lunar descent to be flown either by remote pilot or autonomously. This free-flying platform was designed to be sufficiently-flexible to allow both sensor evaluation and pilot training. This handbook outlines the course materials, describes the systems engineering processes developed to facilitate design fabrication, integration, and testing. This handbook presents sufficient details of the final design configuration to allow an independent group to reproduce the design. The design evolution and details regarding the verification testing used to characterize the system are presented in a separate project final design report. Details of the experimental apparatus used for system characterization may be found in Appendix F, G, and I of that report. A brief summary of the ground testing and systems verification is also included in Appendix A of this report. Details of the flight tests will be documented in a separate flight test

  11. Design of a Maglev Vibration Test Platform for the Research of Maglev Vehicle-girder Coupled Vibration Problem

    Directory of Open Access Journals (Sweden)

    Zhou Danfeng

    2017-01-01

    Full Text Available The maglev vehicle-girder coupled vibration problem has been encountered in many maglev test or commercial lines, which significantly degrade the performance of the maglev train. In previous research on the principle of the coupled vibration problem, it has been discovered that the fundamental model of the maglev girder can be simplified as a series of mass-spring resonators of different but related resonance frequencies, and that the stability of the vehicle-girder coupled system can be investigated by separately examining the stability of each mass-spring resonator – electromagnet coupled system. Based on this conclusion, a maglev test platform, which includes a single electromagnetic suspension control system, is built for experimental study of the coupled vibration problem. The guideway of the test platform is supported by a number of springs so as to change its flexibility. The mass of the guideway can also be changed by adjusting extra weights attached to it. By changing the flexibility and mass of the guideway, the rules of the maglev vehicle-girder coupled vibration problem are to be examined through experiments, and related theory on the vehicle-girder self-excited vibration proposed in previous research is also testified.

  12. Research on motor braking-based DYC strategy for distributed electric vehicle

    Science.gov (United States)

    Zhang, Jingming; Liao, Weijie; Chen, Lei; Cui, Shumei

    2017-08-01

    In order to bring into full play the advantages of motor braking and enhance the handling stability of distributed electric vehicle, a motor braking-based direct yaw moment control (DYC) strategy was proposed. This strategy could identify whether a vehicle has under-steered or overs-steered, to calculate the direct yaw moment required for vehicle steering correction by taking the corrected yaw velocity deviation and slip-angle deviation as control variables, and exert motor braking moment on the target wheels to perform correction in the manner of differential braking. For validation of the results, a combined simulation platform was set up finally to simulate the motor braking control strategy proposed. As shown by the results, the motor braking-based DYC strategy timely adjusted the motor braking moment and hydraulic braking moment on the target wheels, and corrected the steering deviation and sideslip of the vehicle in unstable state, improving the handling stability.

  13. Design and research on the electronic parking brake system of the medium and heavy duty vehicles

    Directory of Open Access Journals (Sweden)

    Hongliang WANG

    2015-04-01

    Full Text Available Focusing on auto control of parking brake system of the medium and heavy duty vehicles, the key problems are studied including the system design and control strategies. The structure and working principle of the parking brake system of the medium and heavy duty vehicles are analyzed. The functions of EPB are proposed. The important information of the vehicle are analyzed which could influence the EPB system. The overall plan of the pneumatic EPB system is designed, which adopts the two-position three-way electromagnetic valve with double coil as actuator. The system could keep the vehicle parking brake status or parking release status for a long time without power supply. The function modules of the system are planned, and the control strategies of automatic parking brake and parking release are made. The experiment is performed on a medium-sized commercial vehicle which is experimentally modified. The overall plan of the pneumatic EPB system and the automatic parking function are proved through real vehicle tests.

  14. The research of road and vehicle information extraction algorithm based on high resolution remote sensing image

    Science.gov (United States)

    Zhou, Tingting; Gu, Lingjia; Ren, Ruizhi; Cao, Qiong

    2016-09-01

    With the rapid development of remote sensing technology, the spatial resolution and temporal resolution of satellite imagery also have a huge increase. Meanwhile, High-spatial-resolution images are becoming increasingly popular for commercial applications. The remote sensing image technology has broad application prospects in intelligent traffic. Compared with traditional traffic information collection methods, vehicle information extraction using high-resolution remote sensing image has the advantages of high resolution and wide coverage. This has great guiding significance to urban planning, transportation management, travel route choice and so on. Firstly, this paper preprocessed the acquired high-resolution multi-spectral and panchromatic remote sensing images. After that, on the one hand, in order to get the optimal thresholding for image segmentation, histogram equalization and linear enhancement technologies were applied into the preprocessing results. On the other hand, considering distribution characteristics of road, the normalized difference vegetation index (NDVI) and normalized difference water index (NDWI) were used to suppress water and vegetation information of preprocessing results. Then, the above two processing result were combined. Finally, the geometric characteristics were used to completed road information extraction. The road vector extracted was used to limit the target vehicle area. Target vehicle extraction was divided into bright vehicles extraction and dark vehicles extraction. Eventually, the extraction results of the two kinds of vehicles were combined to get the final results. The experiment results demonstrated that the proposed algorithm has a high precision for the vehicle information extraction for different high resolution remote sensing images. Among these results, the average fault detection rate was about 5.36%, the average residual rate was about 13.60% and the average accuracy was approximately 91.26%.

  15. Research of Energy Regeneration Technology in Electric Vehicle%电动车能量再生技术

    Institute of Scientific and Technical Information of China (English)

    陈家新; 江建中; 汪信尧

    2003-01-01

    The theory of energy regeneration in electric vehicle (EV) has been introduced in most papers, but the mathematic modelof EV energy regeneration system was little studied. In this paper the mathematic model of EV energy regeneration system is studied,and then the system ability under four control strategies is analyzed. In the end the system reliability is researched, and the calcula-tion model of system reliability is proposed.

  16. Simulation Research on an Electric Vehicle Chassis System Based on a Collaborative Control System

    Directory of Open Access Journals (Sweden)

    Nenglian Feng

    2013-01-01

    Full Text Available This paper presents a collaborative control system for an electric vehicle chassis based on a centralized and hierarchical control architecture. The centralized controller was designed for the suspension and steering system, which is used for improving ride comfort and handling stability; the hierarchical controller was designed for the braking system, which is used for distributing the proportion of hydraulic braking and regenerative braking to improve braking performance. These two sub-controllers function at the same level of the vehicle chassis control system. In order to reduce the potential conflict between the two sub-controllers and realize a coordination optimization of electric vehicle performance, a collaborative controller was built, which serves as the upper controller to carry out an overall coordination analysis according to vehicle signals and revises the decisions of sub-controllers. A simulation experiment was carried out with the MATLAB/Simulink software. The simulation results show that the proposed collaborative control system can achieve an optimized vehicle handling stability and braking safety.

  17. Research of Ant Colony Optimized Adaptive Control Strategy for Hybrid Electric Vehicle

    Directory of Open Access Journals (Sweden)

    Linhui Li

    2014-01-01

    Full Text Available Energy management control strategy of hybrid electric vehicle has a great influence on the vehicle fuel consumption with electric motors adding to the traditional vehicle power system. As vehicle real driving cycles seem to be uncertain, the dynamic driving cycles will have an impact on control strategy’s energy-saving effect. In order to better adapt the dynamic driving cycles, control strategy should have the ability to recognize the real-time driving cycle and adaptively adjust to the corresponding off-line optimal control parameters. In this paper, four types of representative driving cycles are constructed based on the actual vehicle operating data, and a fuzzy driving cycle recognition algorithm is proposed for online recognizing the type of actual driving cycle. Then, based on the equivalent fuel consumption minimization strategy, an ant colony optimization algorithm is utilized to search the optimal control parameters “charge and discharge equivalent factors” for each type of representative driving cycle. At last, the simulation experiments are conducted to verify the accuracy of the proposed fuzzy recognition algorithm and the validity of the designed control strategy optimization method.

  18. Vehicle active steering control research based on two-DOF robust internal model control

    Science.gov (United States)

    Wu, Jian; Liu, Yahui; Wang, Fengbo; Bao, Chunjiang; Sun, Qun; Zhao, Youqun

    2016-07-01

    Because of vehicle's external disturbances and model uncertainties, robust control algorithms have obtained popularity in vehicle stability control. The robust control usually gives up performance in order to guarantee the robustness of the control algorithm, therefore an improved robust internal model control(IMC) algorithm blending model tracking and internal model control is put forward for active steering system in order to reach high performance of yaw rate tracking with certain robustness. The proposed algorithm inherits the good model tracking ability of the IMC control and guarantees robustness to model uncertainties. In order to separate the design process of model tracking from the robustness design process, the improved 2 degree of freedom(DOF) robust internal model controller structure is given from the standard Youla parameterization. Simulations of double lane change maneuver and those of crosswind disturbances are conducted for evaluating the robust control algorithm, on the basis of a nonlinear vehicle simulation model with a magic tyre model. Results show that the established 2-DOF robust IMC method has better model tracking ability and a guaranteed level of robustness and robust performance, which can enhance the vehicle stability and handling, regardless of variations of the vehicle model parameters and the external crosswind interferences. Contradiction between performance and robustness of active steering control algorithm is solved and higher control performance with certain robustness to model uncertainties is obtained.

  19. Research on TDM approach of sharing BRT-lane supported by vehicle-infrastructure integration

    Institute of Scientific and Technical Information of China (English)

    Dong Hongzhao; Ling Yue; Liu Dongxu; Guo Mingfei

    2013-01-01

    In order to increase the availability of the part-time idle bus rapid transit lane (BRT-lane),a time divi-sion multiplexing (TDM) method to share BRT-lane with the vehicles besides BRT buses is proposed based on ve-hicle-road collaboration. The TDM control strategy is established under the circumstance of vehicle-infrastructure integration (VII). The algorithm is given to forecast the segmented BRT travel time. According to the real time traffic information,a comprehensive model is given to estimate the vehicles’lane-changing time from/to the BRT-lane to/from its neighbor lane and determine the timing sequence for vehicles collaboration. Finally,the experi-ment demonstrates that the predicted value of the travel time and lane-changing time is much close to the true val-ue. The control strategy of the vehicles collaboration could promise the non-BRT vehicles to share BRT-lane with-out disturbing BRT’s priority.

  20. Lead-acid traction batteries for electric road vehicle propulsion Directions for research and development

    Science.gov (United States)

    Rand, D. A. J.

    1980-09-01

    Little information exists on the behavior of lead-acid batteries operating under the duty cycles normal to electric road vehicle service. Important battery requirements for the propulsion of traffic-compatible electric vehicles include a deep-discharge capability at high efficiencies of active material utilization, and a long cycle life. In order to optimize power-source characteristics to meet these criteria, especially for passenger cars, it is necessary to gain full knowledge of the influence of actual vehicle service on the performance of traction batteries. This article defines areas in which both fundamental and applied work are required to achieve this aim based on the current performance of the lead-acid system.

  1. Research on multi-objective emergency logistics vehicle routing problem under constraint conditions

    Directory of Open Access Journals (Sweden)

    Miaomiao Du

    2013-03-01

    Full Text Available Purpose: Aim at choosing a relative good vehicle routing in emergency conditions under constraint conditions when disaster happens. Rapid response and rescue can save a lot of people. Design/methodology/approach: Modeling analysis: establishing a mathematical model of multi-objective emergency logistics vehicle routing problem. And in end of the paper, we intend to use genetic algorithms to solve the problem. Findings: Considering time requirement and cost limit both while choosing vehicle routing when the disasters happens is meaningful. We can get a relative good result and give a guidance to rescue teams. Originality/value: Consider cost and time objectives and kinds of realistic conditions (such as the road congestion in the model when solving the problem, having expanded the theory scope.

  2. Research on consumable distribution mode of shipbuilder’s shop based on vehicle routing problem

    Directory of Open Access Journals (Sweden)

    Xiang Su

    2017-02-01

    Full Text Available A distribution vehicle optimization is established with considerations for the problem of long period of requisition and high shop costs due to the existing consumable requisition mode in shipbuilder’s shops for the requirements of shops for consumables. The shortest traveling distance of distribution vehicles are calculated with the genetic algorithm (GA. Explorations are made into a shop consumable distribution mode for shipbuilders to help them to effectively save their production logistics costs, enhance their internal material management level and provide reference for shipbuilder’s change in traditional ways and realization of just-in-time (JIT production.

  3. Research on Electro Hydraulic Proportional Control for Heavy Vehicle Blend Braking System

    Institute of Scientific and Technical Information of China (English)

    XU Ming

    2009-01-01

    A blend braking system of heavy vehicle was proposed. The main control part of the system is the electro hydraulic proportional servo valve. A nonlinear model of brake cylinder controlled by the valve was deduced through the analysis of its control property and system feature. The transfer function of the system was also proposed, and the hydraulic inherent frequency and the PID closed-loop system feature were calculated. The simulated result is consistent with those tested in the bench and on the site with 50t heavy vehicle. The experimental result shows that the control method has quick response and high precision.

  4. Research on Quantitative Models of Electric Vehicle Charging Stations Based on Principle of Energy Equivalence

    Directory of Open Access Journals (Sweden)

    Zhenpo Wang

    2013-01-01

    Full Text Available In order to adapt the matching and planning requirements of charging station in the electric vehicle (EV marketization application, with related layout theories of the gas stations, a location model of charging stations is established based on electricity consumption along the roads among cities. And a quantitative model of charging stations is presented based on the conversion of oil sales in a certain area. Both are combining the principle based on energy consuming equivalence substitution in process of replacing traditional vehicles with EVs. Defined data are adopted in the example analysis of two numerical case models and analyze the influence on charging station layout and quantity from the factors like the proportion of vehicle types and the EV energy consumption at the same time. The results show that the quantitative model of charging stations is reasonable and feasible. The number of EVs and the energy consumption of EVs bring more significant impact on the number of charging stations than that of vehicle type proportion, which provides a basis for decision making for charging stations construction layout in reality.

  5. NREL Research and Thoughts on Connected and Automated Vehicle Energy Impacts; NREL (National Renewable Energy Laboratory)

    Energy Technology Data Exchange (ETDEWEB)

    Gonder, Jeff; Wood, Eric; Lammert, Michael

    2014-12-09

    Jeff was invited to brief the EPA Mobile Sources Technical Review Subcommittee on considerations regarding potential energy and environmental considerations for connected and automated vehicles. For more information about the MSTRS see http://www2.epa.gov/caaac/mobile-sources-technical-review-subcommittee-mstrs-caaac.

  6. Concept, design, performance and handling of the three-wheeled research vehicle the VW 'Scooter'

    Energy Technology Data Exchange (ETDEWEB)

    Dreyer, W.; Maretzke, J.; Pommer, E.

    With its VW Scooter, Volkswagen Research has come up with a vehicle concept representing a cross between a small sporty car and a powerful motorcycle. Characteristic features of the Scooter include its aerodynamic raindrop shape, its three wheels, its easily detachable gull-wing doors and an interior design that reminds one of a cockpit. The Scooter's low c/sub d/ drag keeps it very economical and environmentally compatible even at relatively high road speeds without detracting in the least from its most important feature the fun of driving it. This has been confirmed in tests done on vehicle handling. The Scooter offers safety from the dangers of tipping or pitching over during the longitudinal and lateral accelerations attainable on a non-slippery road surface. Its tendency to understeer and good directional stability are similar to those of comparable four-wheeled passenger cars even at high speeds.

  7. Wright Brothers Lectureship in Aeronautics: Experience with HiMAT remotely piloted research vehicle - An alternate flight test approach

    Science.gov (United States)

    Deets, D. A.; Brown, L. E.

    1986-01-01

    The highly maneuverable aircraft technology (HiMAT) program explored the various and complex interactions of advanced technologies, such as aeroelastic tailoring, close-coupled canard, and relaxed static stability. A 0.44-subscale remotely piloted research vehicle (RPRV) of a hypothetical fighter airplane was designed and flight-tested to determine the effects of these interactions and to define the design techniques appropriate for advanced fighter technologies. Flexibility and high maneuverability were provided by flight control laws implemented in ground-based computers and telemetered to the vehicle control system during flight tests. The high quality of the flight-measured data and their close correlation with the analytical design modeling proved that the RPRV is a viable and cost-effective tool for developing aerodynamic, structure, and control law requirements for highly maneuverable fighter airplanes of the future.

  8. Using the Integrated Vehicle Health Management Research Test and Integration Plan Wiki to Identify Synergistic Test Opportunities

    Science.gov (United States)

    Koelfgen, Syri J.; Faber, James J.

    2010-01-01

    The National Aeronautics and Space Administration (NASA) and the aviation industry have recognized a need for developing a method to identify and combine resources to carry out research and testing more efficiently. The Integrated Vehicle Health Management (IVHM) Research Test and Integration Plan (RTIP) Wiki is a tool that is used to visualize, plan, and accomplish collaborative research and testing. Synergistic test opportunities are developed using the RTIP Wiki, and include potential common resource testing that combines assets and personnel from NASA, industry, academia, and other government agencies. A research scenario is linked to the appropriate IVHM milestones and resources detailed in the wiki, reviewed by the research team members, and integrated into a collaborative test strategy. The scenario is then implemented by creating a test plan when appropriate and the research is performed. The benefits of performing collaborative research and testing are achieving higher Technology Readiness Level (TRL) test opportunities with little or no additional cost, improved quality of research, and increased communication among researchers. In addition to a description of the method of creating these joint research scenarios, examples of the successful development and implementation of cooperative research using the IVHM RTIP Wiki are given.

  9. Research on motor rotational speed measurement in regenerative braking system of electric vehicle

    Science.gov (United States)

    Pan, Chaofeng; Chen, Liao; Chen, Long; Jiang, Haobin; Li, Zhongxing; Wang, Shaohua

    2016-01-01

    Rotational speed signals acquisition and processing techniques are widely used in rotational machinery. In order to realized precise and real-time control of motor drive and regenerative braking process, rotational speed measurement techniques are needed in electric vehicles. Obtaining accurate motor rotational speed signal will contribute to the regenerative braking force control steadily and realized higher energy recovery rate. This paper aims to develop a method that provides instantaneous speed information in the form of motor rotation. It addresses principles of motor rotational speed measurement in the regenerative braking systems of electric vehicle firstly. The paper then presents ideal and actual Hall position sensor signals characteristics, the relation between the motor rotational speed and the Hall position sensor signals is revealed. Finally, Hall position sensor signals conditioning and processing circuit and program for motor rotational speed measurement have been carried out based on measurement error analysis.

  10. Research and Development of a PEM Fuel Cell, Hydrogen Reformer, and Vehicle Refueling Facility

    Energy Technology Data Exchange (ETDEWEB)

    Edward F. Kiczek

    2007-08-31

    Air Products and Chemicals, Inc. has teamed with Plug Power, Inc. of Latham, NY, and the City of Las Vegas, NV, to develop, design, procure, install and operate an on-site hydrogen generation system, an alternative vehicle refueling system, and a stationary hydrogen fuel cell power plant, located in Las Vegas. The facility will become the benchmark for validating new natural gas-based hydrogen systems, PEM fuel cell power generation systems, and numerous new technologies for the safe and reliable delivery of hydrogen as a fuel to vehicles. Most important, this facility will serve as a demonstration of hydrogen as a safe and clean energy alternative. Las Vegas provides an excellent real-world performance and durability testing environment.

  11. Research and Development of Unmanned Aviation Vehicle System for Disaster Countermeasures

    OpenAIRE

    2013-01-01

    The authors developed low cost unmanned helicopter, real time video data transmitting system and a new type flying robots. The effectiveness is confirmed by real field experiment tests. Hazard map for disaster countermeasures is made on the basis of data obtained by the aviation vehicle system. The hazard map is delivered directly to a smart phone and a tablet PC. Therefore residents can keep track of disaster information quickly and accurately.

  12. Research on Modeling and Control of Regenerative Braking for Brushless DC Machines Driven Electric Vehicles

    OpenAIRE

    Jian-ping Wen; Chuan-wei Zhang

    2015-01-01

    In order to improve energy utilization rate of battery-powered electric vehicle (EV) using brushless DC machine (BLDCM), the model of braking current generated by regenerative braking and control method are discussed. On the basis of the equivalent circuit of BLDCM during the generative braking period, the mathematic model of braking current is established. By using an extended state observer (ESO) to observe actual braking current and the unknown disturbances of regenerative braking system, ...

  13. Research on Sensorless control strategies for Vehicle stability using Fuzzy based EDC

    Directory of Open Access Journals (Sweden)

    A.Ravi

    2014-05-01

    Full Text Available This paper presents an efficient and robust control scheme of Fuzzy Logic Electronic Differential Controller (FLEDC for sensorless drive based electric vehicle. The proposed system consists of two Brushless DC motors (BLDC that ensure the drive of the two back driving wheels of an electric vehicle. Electronic differential controller (EDC ensures the maximum torque and it can control both the driving wheel independently to turn at different speeds in any curve according to the steering angle. The sensorless control strategies include back EMF zero crossing detection and third harmonic voltage integration. Fuzzy logic based EDC is used on these sensorless control strategies which optimizes the slip rate within the specified limit and thus enhances the vehicle stability The performances in terms of slip rate, current, Torque, back EMF are obtained by the proposed method and are compared with those obtained using conventional control method. By this comparative investigation, a suitable control strategy has been identified. The effectiveness and substantiation of these analysis are ascertained in the MATLAB/Simulink environment and also experimentally validated.

  14. Public opinion on motor vehicle-related injury prevention policies: a systematic review of a decade of research.

    Science.gov (United States)

    Debinski, Beata; Clegg Smith, Katherine; Gielen, Andrea

    2014-01-01

    Legislation is an effective strategy for reducing road-related fatalities and injuries. Public opinion can be an impetus for passing new laws and can affect the success of their implementation, but little is known about the current state of public opinion toward existing and proposed road-related policies in the United States. This review describes the scope and results of research on public support for state- and local-level evidence-based motor vehicle- and bicycle-related policies. We identify gaps in our understanding of public support for these policies. Published U.S. literature and all reports from the NHTSA from the past decade (2003-2012) were searched for data on opinions about existing or proposed policies related to motor vehicle or bicycle injury prevention. Twenty-six studies fulfilled the inclusion criteria. In all, studies reported public opinion about 7 injury prevention topic areas: all-terrain vehicles (n = 1), automated enforcement with red light and speed cameras (n = 5), distracted driving (n = 4), drinking and driving (n = 5), graduated driver licensing (n = 7), helmets (n = 7), and seat belts (n = 4). Twenty-three studies focused only on one topic, and 3 sought public opinion about multiple topic areas. The studies revealed generally high levels of support for injury prevention policies in all topic areas. Fifteen studies collected information from national samples, and only 7 studies reported data from the state (n = 5) or local (n = 2) level. There is a relatively small evidence base on public opinion related to motor vehicle- and bicycle-related evidence-based policies; even less is less known for state- or county-specific policies. The findings of this review suggest that the public's opinion toward injury prevention legislation is generally favorable. This information can be used to communicate with the media and policy makers to reinforce the need for effective policy solutions to continuing motor vehicle injury problems. More research

  15. Hermes vehicle

    Science.gov (United States)

    Cretenet, J. C.

    1985-11-01

    The presence of Europe in the future developments of spatial programs, which are foreseen, for the 1990s and further, needs the availability of vehicles, modules and all related technologies adapted to operational use of low earth orbit station. The manned HERMES vehicle shall be part of the in-orbit infrastructure realized either in the European context or in cooperation between Europe and the United States. The main mission for this vehicle will be to run a shuttle with the station that means transport and change of the crews, its safe return in abort condition and cargo transport of consumable and experimental equipment. Secondary missions could be servicing on automatic platform, making autonomous scientific experiments. Lastly, the vehicle, by means of its on-board propulsion capability, could be used to accomplish in-orbit tow and assembly missions. Studies which are undertaken now about the vehicle are devoted to the aerodynamic shape (research of a compromise between aerothermic and overall fitting), the system (functional architecture, ground and flight configuration); further works dealing with technology are presently on hand in the field of thermal protection, aerodynamics, power generation with a high massic yield.

  16. Design of integrated autopilot/autothrottle for NASA TSRV airplane using integral LQG methodology. [transport systems research vehicle

    Science.gov (United States)

    Kaminer, Isaac; Benson, Russell A.

    1989-01-01

    An integrated autopilot/autothrottle control system has been developed for the NASA transport system research vehicle using a two-degree-of-freedom approach. Based on this approach, the feedback regulator was designed using an integral linear quadratic regulator design technique, which offers a systematic approach to satisfy desired feedback performance requirements and guarantees stability margins in both control and sensor loops. The resulting feedback controller was discretized and implemented using a delta coordinate concept, which allows for transient free controller switching by initializing all controller states to zero and provides a simple solution for dealing with throttle limiting cases.

  17. Research of Charging(Discharging Orderly and Optimizing Load Curve for Electric Vehicles Based on Dynamic Electric Price and V2G

    Directory of Open Access Journals (Sweden)

    Yang Shuai

    2016-01-01

    Full Text Available Firstly, using the Monte Carlo method and simulation analysis, this paper builds models for the behaviour of electric vehicles, the conventional charging model and the fast charging model. Secondly, this paper studies the impact that the number of electric vehicles which get access to power grid has on the daily load curve. Then, the paper put forwards a dynamic pricing mechanism of electricity, and studies how this dynamic pricing mechanism guides the electric vehicles to charge orderly. Last but not the least, the paper presents a V2G mechanism. Under this mechanism, electric vehicles can charge orderly and take part in the peak shaving. Research finds that massive electric vehicles’ access to the power grid will increase the peak-valley difference of daily load curve. Dynamic pricing mechanism and V2G mechanism can effectively lead the electric vehicles to take part in peak-shaving, and optimize the daily load curve.

  18. Research on Modeling and Control of Regenerative Braking for Brushless DC Machines Driven Electric Vehicles

    Directory of Open Access Journals (Sweden)

    Jian-ping Wen

    2015-01-01

    Full Text Available In order to improve energy utilization rate of battery-powered electric vehicle (EV using brushless DC machine (BLDCM, the model of braking current generated by regenerative braking and control method are discussed. On the basis of the equivalent circuit of BLDCM during the generative braking period, the mathematic model of braking current is established. By using an extended state observer (ESO to observe actual braking current and the unknown disturbances of regenerative braking system, the autodisturbances rejection controller (ADRC for controlling the braking current is developed. Experimental results show that the proposed method gives better recovery efficiency and is robust to disturbances.

  19. Research on safety evaluation model for in-vehicle secondary task driving.

    Science.gov (United States)

    Jin, Lisheng; Xian, Huacai; Niu, Qingning; Bie, Jing

    2015-08-01

    This paper presents a new method for evaluating in-vehicle secondary task driving safety. There are five in-vehicle distracter tasks: tuning the radio to a local station, touching the touch-screen telephone menu to a certain song, talking with laboratory assistant, answering a telephone via Bluetooth headset, and finding the navigation system from Ipad4 computer. Forty young drivers completed the driving experiment on a driving simulator. Measures of fixations, saccades, and blinks are collected and analyzed. Based on the measures of driver eye movements which have significant difference between the baseline and secondary task driving conditions, the evaluation index system is built. The Analytic Network Process (ANP) theory is applied for determining the importance weight of the evaluation index in a fuzzy environment. On the basis of the importance weight of the evaluation index, Fuzzy Comprehensive Evaluation (FCE) method is utilized to evaluate the secondary task driving safety. Results show that driving with secondary tasks greatly distracts the driver's attention from road and the evaluation model built in this study could estimate driving safety effectively under different driving conditions.

  20. Research on Consumers’ Use Willingness and Opinions of Electric Vehicle Sharing: An Empirical Study in Shanghai

    Directory of Open Access Journals (Sweden)

    Ning Wang

    2015-12-01

    Full Text Available An empirical study in Shanghai was performed to explore consumers’ use willingness and opinions on electric vehicle sharing (EVS to help operators effectively operate and expand the new business model. Through the multinomial logistic regression developed for different groups, the results show that the factors of the main trip mode in daily use, monthly transportation expenditure, driving range of electric vehicles, gender, age, marital status and occupation have significant influences on consumers’ use willingness. In short, the population characteristics of people choosing to use EVS are male, aged between 18 and 30 and usually taking the subway and bus as the daily transportation modes. Otherwise, the factors of the acceptable highest price of EVS, occupation and personal monthly income have significant impacts on the use willingness of people who keep a neutral stance. These people pay more attention to convenience and the economy of EVS. These results reveal that a reasonable price, accurate positioning of target groups, convenient site layout and usage are required for operators to successfully launch a new transportation mode of EVS.

  1. 铰接式车体应用及研究现状概述%Summary of Articulated Vehicle Application and Research Status

    Institute of Scientific and Technical Information of China (English)

    杨众; 贾小平; 于魁龙; 马骏

    2015-01-01

    为使车辆研究领域相关人员对铰接式车体有更加深刻的认识,通过对典型铰接式车辆、铰接式机器人的应用情况以及铰接式车体最新理论研究成果进行梳理总结,概述了铰接式车体的应用及研究现状。认为小型化、多自由度化及功能可拓展化是铰接式车体的未来发展趋势,为以后铰接式车体的设计研究提供了一定的思路。%To let the research personnel have more profound understanding at articulated vehicles, the application of typical articulated vehicles and articulated robots as well as the latest theoretical research results of articulated vehicle bodies are sum-marized, the application and research status of articulated vehicles are described. It’s considered that miniaturization, multi-de-gree of freedom and function expandable is the future development trend of articulated vehicles , providing some ideas for future design and research of articulated vehicle body.

  2. Progress report on Bertelsen research and development of an air cushion crawler all-terrain vehicle

    Science.gov (United States)

    Bertelsen, W. R.

    1987-06-01

    The ACV is an exceptional amphibian but it is not, nor is any other existing craft, an all-terrain vehicle (ATV). Using the best elements of the ACV in an air-cushion crawler tractor, a true ATV can be attained. A conventional crawler drive train will propel two tracks as pressurized, propulsive pontoons. The key to a successful ATV is in perfecting efficient, durable, sliding seals to allow the belt to move in its orbit around the track unit and maintain its internal pressure. After deriving the adequate seal, a 12 inch wide x 86 inch long endless rubber belt was fitted bilateral seals and slide plates with internal guide wheels fore and aft with a 21 inch wheel base. From this approximately one-quarter scale model, full-scale air track crawlers, true ATVs, of any size and capacity can be produced.

  3. Research of Obstacle Recognition Technology in Cross-Country Environment for Unmanned Ground Vehicle

    Directory of Open Access Journals (Sweden)

    Zhao Yibing

    2014-01-01

    Full Text Available Being aimed at the obstacle recognition problem of unmanned ground vehicles in cross-country environment, this paper uses monocular vision sensor to realize the obstacle recognition of typical obstacles. Firstly, median filtering algorithm is applied during image preprocessing that can eliminate the noise. Secondly, image segmentation method based on the Fisher criterion function is used to segment the region of interest. Then, morphological method is used to process the segmented image, which is preparing for the subsequent analysis. The next step is to extract the color feature S, color feature a and edge feature “verticality” of image are extracted based on the HSI color space, the Lab color space, and two value images. Finally multifeature fusion algorithm based on Bayes classification theory is used for obstacle recognition. Test results show that the algorithm has good robustness and accuracy.

  4. Research on laser Doppler velocimeter for vehicle self-contained inertial navigation system

    Science.gov (United States)

    Jian, Zhou; Xingwu, Long

    2010-04-01

    An idea of using laser Doppler velocimeter (LDV) to measure the velocity for the vehicle inertial navigation system was put forward. The principle of measuring its own velocity with laser Doppler technique was elaborated and reference-beam LDV was designed. Then Doppler signal was processed by tracking filter, frequency spectrum refinement and frequency spectrum correction algorithm. The result of theory and experiment showed that the reference-beam LDV solved the problem that dual-beam LDV cannot be used for measuring when the system was out of focus. Doppler signal was tracked so that signal-to-noise ratio was improved, and the accuracy of the system was enhanced by the technology of frequency spectrum refinement and correction. The measurement mean error was less than 1.5% in velocity range of 0-30 m/s.

  5. Research on Optimal Control for the Vehicle Suspension Based on the Simulated Annealing Algorithm

    Directory of Open Access Journals (Sweden)

    Jie Meng

    2014-01-01

    Full Text Available A method is designed to optimize the weight matrix of the LQR controller by using the simulated annealing algorithm. This method utilizes the random searching characteristics of the algorithm to optimize the weight matrices with the target function of suspension performance indexes. This method improves the design efficiency and control performance of the LQR control, and solves the problem of the LQR controller when defining the weight matrices. And a simulation is provided for vehicle active chassis control. The result shows that the active suspension using LQR optimized by the genetic algorithm compared to the chassis controlled by the normal LQR and the passive one, shows better performance. Meanwhile, the problem of defining the weight matrices is greatly solved.

  6. The researches of GPS/GSM supervise and control system of vehicle

    Institute of Scientific and Technical Information of China (English)

    Ji,Changpeng; Bao,Jian; Liu,Jianhui

    2003-01-01

    the treatise introduced the GPS supervision and con-trol system, analyzed the features of the VHF/UHF single chan-nel call web, composite groups mobile communication web whichare regularity used in current supervision and control system ofvehicle, and several traffics that the GSM provided, therebybrought forward the project of utilizing GSM-short message toaccomplish the GPS supervision and control system of vehicle ofthe ore deposit of yuanbaoshan, designed the system structureand the method of organizing web, put emphasis on how theGSM-short message technology was used in the supervise andcontrol system,including system constitution, channel using mode,calling mode, synchrony' s mode, data transmitted mode, etc.

  7. Research on the Key Technology of the Cooperative Combat System of Manned Vehicle and Unmanned Aerial Vehicle%有人机/无人机协同作战系统关键技术研究

    Institute of Scientific and Technical Information of China (English)

    刘纪文; 袁胜智; 漆云海; 叶文

    2012-01-01

    无人机将是我国下一步要重点发展的武器装备,而无人机和有人机实施联合编队进行协同作战将是其典型作战方式之一。文章在深入阐述有人机/无人机协同作战基本概念的基础上,通过设定典型有人机/无人机协同作战想定,分析了有人机/无人机协同作战的系统基本组成和体系结构,研究了有人机/无人机协同作战的关键技术。文章的研究对有人机/无人机协同作战的发展具有一定的指导意义。%The Unmanned Aerial Vehicle (UAV) is one of the most important armaments being focused on currently in China. The typical combat mode of UAV is to cooperate with Manned Vehicle. The concept of Manned Vehicle/UAV cooperative combat is put forward, and the basic composition and construction of the cooperative combat system are analyzed. This research will be certain significance for the development of cooperative air combat of manned vehicle and unmanned vehicle.

  8. RESEARCH PROGRESS ON STRUCTURAL FATIGUE RELIABILITY DESIGN AND ANALYSIS METHODS OF CHINESE RAILWAY VEHICLES

    Institute of Scientific and Technical Information of China (English)

    ZHAO Yongxiang; PENG Jiachun; YANG Bing

    2007-01-01

    A state-of-art review is given to the new advances on fatigue reliability design and analysis methods of Chinese railway vehicle's structures. First, the structures are subject to a complicated random fatigue stressing history and this history should be determined by combining dynamic Simulation and on-line inspection. Second, the random fatigue constitutions belong to an intrinsic fatigue phenomenon and a probabilistic model is developed to well describe them with two measurements of survival probability and confidence, similar model is also presented for the random stress-life relations and extrapolated appropriately into long fatigue life regime. Third, concept of the fatigue limit should be understood as the fatigue strength at a given fatigue life and a so-called local Basquin model method is proposed for measuring the random strengths. In addition, drawing and application methods of the Goodman-Smith diagram for integrally characterizing the random fatigue strengths are established in terms of ten kilometers. Fourth, a reliability stress-based method is constructed with a consideration of the random constitutive relations. These new advances form a new frame work for railway fatigue reliability design and analysis.

  9. Research on Roll Stabilizing Based on Energy Optimization for Autonomous Surface Vehicle

    Directory of Open Access Journals (Sweden)

    Hongjian Wang

    2014-01-01

    Full Text Available Considering the case of ASV (autonomous surface vehicle navigating with low speed near water surface, a new method for design of roll motion controller is proposed in order to restrain wave disturbance effectively and improve roll stabilizing performance. Control system design is based on GPC (general predictive control theory and working principle of zero-speed fin stabilizer. Coupling horizontal motion model of ASV is decoupled, and an equivalent transfer function of roll motion is obtained and transformed into a discrete difference equation through inverse Laplace transformation and Euler approximation. Finally, predictive model of GPC, namely, the difference equation of roll motion, is given. GPC algorithm of ASV roll motion is derived from performance index based on roll stabilizing performance and energy consumption used for driving fin stabilizer. In allusion to time-variant parameters in roll motion model, recursive least square method is adopted for parameter estimation. Simulation results of ASV roll motion control show better stabilizing performance and minimized energy consumption improved by self-adaptive GPC.

  10. 78 FR 78467 - Connected Vehicle Research Program Public Meeting; Notice of Public Meeting

    Science.gov (United States)

    2013-12-26

    ..., Research and Innovative Technology Administration, U.S. Department of Transportation. ACTION: Notice. The U... Highway Administration (FHWA) and Research and Innovative Technology Administration (RITA) Connected.... (EST) in the Hampton Room at the Omni Shoreham Hotel, 2500 Calvert Street, NW in Washington, DC. Remote...

  11. Interface of the transport systems research vehicle monochrome display system to the digital autonomous terminal access communication data bus

    Science.gov (United States)

    Easley, W. C.; Tanguy, J. S.

    1986-01-01

    An upgrade of the transport systems research vehicle (TSRV) experimental flight system retained the original monochrome display system. The original host computer was replaced with a Norden 11/70, a new digital autonomous terminal access communication (DATAC) data bus was installed for data transfer between display system and host, while a new data interface method was required. The new display data interface uses four split phase bipolar (SPBP) serial busses. The DATAC bus uses a shared interface ram (SIR) for intermediate storage of its data transfer. A display interface unit (DIU) was designed and configured to read from and write to the SIR to properly convert the data from parallel to SPBP serial and vice versa. It is found that separation of data for use by each SPBP bus and synchronization of data tranfer throughout the entire experimental flight system are major problems which require solution in DIU design. The techniques used to accomplish these new data interface requirements are described.

  12. Comparison of experimental and theoretical reaction rail currents, rail voltages, and airgap fields for the linear induction motor research vehicle

    Science.gov (United States)

    Elliott, D. G.

    1977-01-01

    Measurements of reaction rail currents, reaction rail voltages, and airgap magnetic fields in tests of the Linear Induction Motor Research Vehicle (LIMRV) were compared with theoretical calculations from the mesh/matrix theory. It was found that the rail currents and magnetic fields predicted by the theory are within 20 percent of the measured currents and fields at most motor locations in most of the runs, but differ by as much as a factor of two in some cases. The most consistent difference is a higher experimental than theoretical magnetic field near the entrance of the motor and a lower experimental than theoretical magnetic field near the exit. The observed differences between the theoretical and experimental magnetic fields and currents do not account for the differences of as much as 26 percent between the theoretical and experimental thrusts.

  13. Automatic braking system modification for the Advanced Transport Operating Systems (ATOPS) Transportation Systems Research Vehicle (TSRV)

    Science.gov (United States)

    Coogan, J. J.

    1986-01-01

    Modifications were designed for the B-737-100 Research Aircraft autobrake system hardware of the Advanced Transport Operating Systems (ATOPS) Program at Langley Research Center. These modifications will allow the on-board flight control computer to control the aircraft deceleration after landing to a continuously variable level for the purpose of executing automatic high speed turn-offs from the runway. A bread board version of the proposed modifications was built and tested in simulated stopping conditions. Test results, for various aircraft weights, turnoff speed, winds, and runway conditions show that the turnoff speeds are achieved generally with errors less than 1 ft/sec.

  14. Rapidly Re-Configurable Flight Simulator Tools for Crew Vehicle Integration Research and Design

    Science.gov (United States)

    Pritchett, Amy R.

    2002-01-01

    While simulation is a valuable research and design tool, the time and difficulty required to create new simulations (or re-use existing simulations) often limits their application. This report describes the design of the software architecture for the Reconfigurable Flight Simulator (RFS), which provides a robust simulation framework that allows the simulator to fulfill multiple research and development goals. The core of the architecture provides the interface standards for simulation components, registers and initializes components, and handles the communication between simulation components. The simulation components are each a pre-compiled library 'plugin' module. This modularity allows independent development and sharing of individual simulation components. Additional interfaces can be provided through the use of Object Data/Method Extensions (OD/ME). RFS provides a programmable run-time environment for real-time access and manipulation, and has networking capabilities using the High Level Architecture (HLA).

  15. Personnel and Vehicle Data Collection at Aberdeen Proving Ground (APG) and its Distribution for Research

    Science.gov (United States)

    2015-10-01

    walker’s zig zag pattern...............................................................6 Fig. 7 Day 3 walker’s line horizontal pattern...m apart. Fig. 4 Day 3 walker’s heavy right wedge pattern 6 Fig. 5 Day 3 walker’s diamond pattern Fig. 6 Day 3 walker’s zig zag pattern...ORGANIZATION NAME(S) AND ADDRESS(ES) US Army Research Laboratory ATTN: RDRL-SES-A 2800 Powder Mill Road Adelphi, MD 20783-1138 8. PERFORMING ORGANIZATION

  16. 电动汽车车身结构轻量化研究进展%Research Progress on Electric Vehicle Body Structural Lightweight

    Institute of Scientific and Technical Information of China (English)

    周成军; 沈嵘枫; 周新年; 吴传宇

    2012-01-01

      Energy and environment issues have provided a lot of room for the development of new energy vehicles and electric vehicles have become one of the trends of future automotive development.Because of battery energy storage limitations and endurance mileage requirements, the lightweight design of electric vehicles appears to be particularly important.The development history , research status and methods, technical difficulties involved in the research of vehicle lightweight are summarized and the development trend of vehicle lightweight is stated.%  能源以及环境问题使新能源汽车有了很大的发展空间,电动汽车已成为未来汽车的发展趋势之一。电动汽车受电池容量限制及续驶里程的要求,其轻量化设计非常重要。综述了汽车轻量化的发展历史、研究现状与研究方法、研究的技术难点,阐述了汽车轻量化的发展趋势。

  17. The research on multi-depot and multi-vehicle-type related vehicle routing problem%类电磁机制算法的应用研究

    Institute of Scientific and Technical Information of China (English)

    段熙鹏; 蔡延光; 汤雅连

    2012-01-01

    The iwproved electromagnetism-like mechanism algorithm (EMA) was introduced, and this algorithm was applied to solve multi-depot and multi-vehicle-type related vehicle routing problem. Local search can improve the ability of fine search in the local area, moreover, mobile coefficient can improve the convergence rate. The results show that improved EMA is feasible and flexible to solve this type of RVRP and its better than traditional EMA.%摘要:针对多车场多车型的关联运输调度问题(Multi-depot and Multi—vehicle—type Related Vehi—cle Routing Problem),对传统的类电磁机制算法进行改进,局部搜索可以提高算法在局部区域精细搜索的能力,并引入了移动系数来提高算法的收敛速度。实验结果证明,改进的算法有效地解决了此类问题且优于传统类电磁机制算法。

  18. Study of the feasibility aspects of flight testing an aeroelastically tailored forward swept research wing on a BQM-34F drone vehicle

    Science.gov (United States)

    Mourey, D. J.

    1979-01-01

    The aspects of flight testing an aeroelastically tailored forward swept research wing on a BQM-34F drone vehicle are examined. The geometry of a forward swept wing, which is incorporated into the BQM-34F to maintain satisfactory flight performance, stability, and control is defined. A preliminary design of the aeroelastically tailored forward swept wing is presented.

  19. Infrastructure, Components and System Level Testing and Analysis of Electric Vehicles: Cooperative Research and Development Final Report, CRADA Number CRD-09-353

    Energy Technology Data Exchange (ETDEWEB)

    Neubauer, J.

    2013-05-01

    Battery technology is critical for the development of innovative electric vehicle networks, which can enhance transportation sustainability and reduce dependence on petroleum. This cooperative research proposed by Better Place and NREL will focus on predicting the life-cycle economics of batteries, characterizing battery technologies under various operating and usage conditions, and designing optimal usage profiles for battery recharging and use.

  20. International Space Station as Analog of Interplanetary Transit Vehicle For Biomedical Research

    Science.gov (United States)

    Charles, John B.

    2012-01-01

    Astronaut missions lasting up to six months aboard the International Space Station (ISS) have much in common with interplanetary flights, especially the outbound, Earth-to-Mars transit portion of a Mars mission. Utilization of ISS and other appropriate platforms to prepare for crewed expeditions to planetary destinations including Mars has been the work of NASA's Human Research Program (HRP) since 2005. HRP is charged specifically to understand and reduced the risks to astronaut health and performance in space exploration missions: everything HRP does and has done is directly related to that responsibility. Two major categories of human research have capitalized on ISS capabilities. The first category centers on the biomedical aspects of long-duration exposure to spaceflight factors, including prolonged weightlessness, radiation exposure, isolation and confinement, and actual risk to life and limb. These studies contribute to astronaut safety, health and efficiency on any long-duration missions, whether in low Earth orbit (LEO) or beyond. Qualitatively, weightlessness is weightlessness, whether in LEO or en route to Mars. The HRP sponsors investigations into losses in muscle and bone integrity, cardiovascular function, sensory-motor capability, immune capacity and psychosocial health, and development and demonstration of appropriate treatments and preventative measures. The second category includes studies that are focused on planetary expeditions beyond LEO. For these, ISS offers a high fidelity analog to investigate the combined effects of spaceflight factors (described above) plus the isolation and autonomy associated with simulated increasing distance from Earth. Investigations address crew cohesion, performance and workload, and mission control performance. The behavioral health and performance and space human factors aspects of planetary missions dominate this category. Work has already begun on a new investigation in this category which will examine the

  1. Validation of the Training Benefit Forecasting Method: Recreational Vehicle Service Training. Training and Development Research Center: Project Number Six.

    Science.gov (United States)

    Swanson, Richard A.; Geroy, Gary D.

    The validity of the Training Benefit Forecasting Method (TBFM) in a recreational vehicle service training setting was studied. Cost-benefit issues were associated with the Onan Service School change from a field-based Recreational Vehicle Generator Set training program to a customer-delivered self-instructional training program. Actual costs and…

  2. Research, development, and demonstration of nickel-zinc batteries for electric vehicle propulsion. Annual report for 1980

    Energy Technology Data Exchange (ETDEWEB)

    1981-03-01

    Progress in the development of nickel-zinc batteries for electric vehicles is reported. Information is presented on nickel electrode preparation and testing; zinc electrode preparation with additives and test results; separator development and the evaluation of polymer-blend separator films; sealed Ni-Zn cells; and the optimization of electric vehicle-type Ni-Zn cells. (LCL)

  3. A research into the application of the production capacity of passenger and light commercial vehicles in China

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    1. An overall judgment on the situation 2006 saw the rapid growth of passenger vehicles, with the production capacity putting into use rose from less than 70 percent to around 80 percent. That with light commercial vehicles was similar too. The situation in 2005 and 2006 showed that there are no evidential overdone production capacity.

  4. Automated Vehicles Symposium 2015

    CERN Document Server

    Beiker, Sven

    2016-01-01

    This edited book comprises papers about the impacts, benefits and challenges of connected and automated cars. It is the third volume of the LNMOB series dealing with Road Vehicle Automation. The book comprises contributions from researchers, industry practitioners and policy makers, covering perspectives from the U.S., Europe and Japan. It is based on the Automated Vehicles Symposium 2015 which was jointly organized by the Association of Unmanned Vehicle Systems International (AUVSI) and the Transportation Research Board (TRB) in Ann Arbor, Michigan, in July 2015. The topical spectrum includes, but is not limited to, public sector activities, human factors, ethical and business aspects, energy and technological perspectives, vehicle systems and transportation infrastructure. This book is an indispensable source of information for academic researchers, industrial engineers and policy makers interested in the topic of road vehicle automation.

  5. The Electric Vehicle Development

    DEFF Research Database (Denmark)

    Wang, Jingyu; Liu, Yingqi; Kokko, Ari

    2014-01-01

    In order to respond to the energy crisis and environment problem, countries carry out their research and promotion about electric vehicles. As the ten cities one thousand new energy buses started in 2009, the new energy vehicles have been greatly developed in China, while the development of elect...

  6. Chess databases as a research vehicle in psychology: Modeling large data.

    Science.gov (United States)

    Vaci, Nemanja; Bilalić, Merim

    2016-09-01

    The game of chess has often been used for psychological investigations, particularly in cognitive science. The clear-cut rules and well-defined environment of chess provide a model for investigations of basic cognitive processes, such as perception, memory, and problem solving, while the precise rating system for the measurement of skill has enabled investigations of individual differences and expertise-related effects. In the present study, we focus on another appealing feature of chess-namely, the large archive databases associated with the game. The German national chess database presented in this study represents a fruitful ground for the investigation of multiple longitudinal research questions, since it collects the data of over 130,000 players and spans over 25 years. The German chess database collects the data of all players, including hobby players, and all tournaments played. This results in a rich and complete collection of the skill, age, and activity of the whole population of chess players in Germany. The database therefore complements the commonly used expertise approach in cognitive science by opening up new possibilities for the investigation of multiple factors that underlie expertise and skill acquisition. Since large datasets are not common in psychology, their introduction also raises the question of optimal and efficient statistical analysis. We offer the database for download and illustrate how it can be used by providing concrete examples and a step-by-step tutorial using different statistical analyses on a range of topics, including skill development over the lifetime, birth cohort effects, effects of activity and inactivity on skill, and gender differences.

  7. Research of the Warning Alarm Device of Vehicle Rollover%汽车侧翻预警报警装置的研究

    Institute of Scientific and Technical Information of China (English)

    陈启鹏; 熊巧巧; 周成

    2012-01-01

    阐述了汽车侧翻的危害,以及我国汽车侧翻预警装置的研究现状.简述了汽车侧翻预警报警装置的工作原理,提出了一种基于侧向加速度和基于横向载荷转移率为侧翻判断条件的侧翻预警的方法.指出侧向加速度和横向载荷转移率是开发实用汽车侧翻预警报警系统的关键技术,并对汽车侧翻预警报警装置的实用性进行了探讨.%This paper states the damage of vehicle rollover, and the research status of the warning alarm device of vehicle rollover at home. Additionally, it supplely states the warning alarm device of vehicle rollover,which presents a rollover warning method that based on lateral acceleration and lateral load transfer ratio. And finally,it points out lateral acceleration and lateral load transfer ratio are the key technology of exploiting the application vehicle rollover warning alarm system, and discuss the practicability of vehicle rollover warning alarm device.

  8. 汽车火灾探测研究现状及发展趋势%The research status and development trend of vehicle fire detection

    Institute of Scientific and Technical Information of China (English)

    杜建华; 张认成; 丁环; 吴添林; 蒋少茵

    2012-01-01

    The damage caused by vehicle fires in recent years was elaborated. The research work and experiments of vehicle fires in China and other countries were analyzed, and it was pointed out that most scholars focus on the fire characteristics after the fires had occurred and had large damaging power. The development trend of vehicle fire detection was proposed. The importance of analyzing the causes and mechanism of vehicle fires was emphasized) and the vehicle fire causes were analyzed in points of electrical system, oil system and exhaust system.%阐述了近年来汽车火灾造成的损失,分析了国内外对于汽车火灾开展的实验研究工作,指出目前国内外学者着重于汽车火灾发生后且达到一定破坏能力时的火灾特性研究.提出汽车火灾探测研究的发展趋势,强调分析汽车火灾发生原因机理的重要性,并从电气系统、油路系统、排气系统几方面分析汽车或者发生原因.

  9. Research on Navigation System of Unmanned Aircraft Vehicle%无人机导航技术研究

    Institute of Scientific and Technical Information of China (English)

    顾云涛

    2013-01-01

      无人机导航系统是无人机完成给定任务的关键要素之一。本文分析了现有的导航技术优缺点;研究了高空长航时无人机、无人作战飞机和微小型无人机三种无人机执行任务的特点及作战环境,在此基础上,分别给出与之相应的导航方式。%  The navigation system of Unmanned Aircraft Vehicle (UAV) is one of the essentials to accomplish the planned missions. The advantages and disadvantages of the current navigation techniques are analyzed in this paper. The missions to execute and warfare environment are researched for high altitude long-endurance UAV, combat-based UAV and Micro-miniature UAV, and navigation modes relative the UAV are represented.

  10. 车辆路径问题(VRP)算法研究%Research Algorithm on Vehicle Rrouting Problem(VRP)

    Institute of Scientific and Technical Information of China (English)

    马磊

    2009-01-01

    Vehicle routing problem (VRP) is a graph theory of NP problems, the current algorithm for solving such problems can be divided into: Exact algorithms, classic and modem heuristic algorithm for the three types of heuristics; In this paper, analysised the scope ,the problems and occasions of these three types of algorithms, and the methods to improve the program; Finally, given the research prospects.%车辆路径问题(VRP)是图论中的NP问题,目前求解这类问题的算法可分为:精确算法、经典启发式算法和现代启发式算法三类;对这三类算法中最具代表性的几种算法进行了分析指出了其适用范围和场合、存在的问题以及改进的方案;最后,对其研究前景进行了展望.

  11. 车脸定位及识别方法研究%Research on Vehicle Face Localization and Recognition Method

    Institute of Scientific and Technical Information of China (English)

    李全武; 李玉惠; 李勃; 陈伊

    2015-01-01

    Focused on those vehicles with unrecognized license plate, this paper proposes a new approach for vehicle face localization and vehicle face recognition. The approach is divided into two steps: Firstly, adaptive boosting (Adaboost) algorithm improved by experience rectangle method proposed in this paper is used for vehicle face local-ization. Secondly, scale-invariant feature transform (SIFT) and speeded up robust features (SURF) local invariant features are extracted from the detected vehicle face, vehicle face recognition algorithm is improved by adding loca-tion constraints to matched points pair and combining SIFT and SURF. Then the vehicle type is recognized by com-paring it with the same features stored in the standard vehicle type database. Experiments show that the algorithm can locate vehicle face quickly and effectively, the correct recognition rate reaches 83.6%. Images captured on the highway bayonet are mostly from the front view, so the vehicle body side information to analyze vehicle type cannot be obtained. To those vehicles with unrecognized license plate, the approach by vehicle face localization, feature extraction and vehicle face recognition by comparison with each vehicle face stored in the standard vehicle type data-base provides a new solution for vehicle type recognition.%针对车牌无法识别的车辆,研究了一种车脸定位及识别方法。该方法分为两个阶段:首先,使用Adaboost算法进行车脸定位,并利用经验矩形方法进行定位改进;其次,在定位出来的车脸区域提取SIFT(scale-invariant feature transform)和SURF(speeded up robust feature)局部不变性特征,利用这两种不变性特征的叠加及位置约束改进匹配算法,与标准车型数据库中的车脸特征进行匹配,根据匹配结果进行车脸识别,从而得到车辆类型。实验结果表明,该方法的正确识别率达到83.6%。交通卡口抓拍到的车辆照片基本是正前照,无

  12. Vehicle Ancillary Load Reduction Project Close-Out Report: An Overview of the Task and a Compilation of the Research Results

    Energy Technology Data Exchange (ETDEWEB)

    Rugh, J.; Farrington, R.

    2008-01-01

    The amount of fuel used for climate control in U.S. vehicles reduces the fuel economy of more than 200 million light-duty conventional vehicles and thus affects U.S. energy security. Researchers at the DOE National Renewable Energy Laboratory estimated that the United States consumes about 7 billion gallons of fuel per year for air-conditioning (A/C) light-duty vehicles. Using a variety of tools, NREL researchers developed innovative techniques and technologies to reduce the amount of fuel needed for these vehicles' ancillary loads. For example, they found that the A/C cooling capacity of 5.7 kW in a Cadillac STS could be reduced by 30% while maintaining a cooldown performance of 30 minutes. A simulation showed that reducing the A/C load by 30% decreased A/C fuel consumption by 26%. Other simulations supported the great potential for improving fuel economy by using new technologies and techniques developed to reduce ancillary loads.

  13. Automated Vehicles Symposium 2014

    CERN Document Server

    Beiker, Sven; Road Vehicle Automation 2

    2015-01-01

    This paper collection is the second volume of the LNMOB series on Road Vehicle Automation. The book contains a comprehensive review of current technical, socio-economic, and legal perspectives written by experts coming from public authorities, companies and universities in the U.S., Europe and Japan. It originates from the Automated Vehicle Symposium 2014, which was jointly organized by the Association for Unmanned Vehicle Systems International (AUVSI) and the Transportation Research Board (TRB) in Burlingame, CA, in July 2014. The contributions discuss the challenges arising from the integration of highly automated and self-driving vehicles into the transportation system, with a focus on human factors and different deployment scenarios. This book is an indispensable source of information for academic researchers, industrial engineers, and policy makers interested in the topic of road vehicle automation.

  14. 车辆调车纵向冲击特性研究%Research on Longitudinal Characteristics of Vehicle Shunting Impact

    Institute of Scientific and Technical Information of China (English)

    孙树磊; 李芾; 黄运华; 周张义; 丁军君

    2014-01-01

    基于车辆在编组连挂时的缓冲器冲击修正模型,通过建立多组列车冲击模型、车体刚度串联模型以及车体-钩缓装置-车体的串联模型,分别研究不同列车编组数量、不同冲击工况、不同车体刚度及不同阻抗特性的车辆缓冲器的组合对车辆纵向冲击特性的影响。结果表明,当冲击车和被冲击车的数量均大于2时,最大车钩力与车辆的数量间不存在明显关联,且此时冲击面的车钩力比编组为其他数量时的车钩力大,因此在进行车辆冲击试验及缓冲器性能测试时,冲击车和被冲击车的数量均大于2较为合理。当车体刚度较小、冲击速度较高时,车体刚度会对车钩力产生较大影响;冲击车和被冲击车具有不同阻抗特性的缓冲器组合冲击时,其最大车钩力和缓冲器行程会不同。因此,新型缓冲器的阻抗特性应设计为在低速冲击时具有柔性,从而保证低速冲击时的车钩力平缓增长,而在高速冲击时应体现为刚性,以限制缓冲器的最大行程。%On the basis of the vehicle impact equation and corrected draft gear model,the vehicle impact model, vehicle structure stiffness series model and vehicle-coupler-vehicle series model of multi-group vehicles were built to study the effect of different numbers of grouped vehicles,different conditions of vehicle impacting and vehicle body stiffness and combinations of draft gears of different resistance characteristics on longitudinal vehi-cle impulses.The results indicate as follows:when both the impacting train and impacted train consist of more than two vehicles,the maximum coupler force is not significantly related to the number of vehicles and the cou-pler force is larger than those of other grouping of vehicles so it is more rational to select the impacting train and impacted train of more than two vehicles in vehicle impact and gear performance tests;the small vehicle structure

  15. Research and implement of remote vehicle monitoring and early-warning system based on GPS/GPRS

    Science.gov (United States)

    Li, Shiwu; Tian, Jingjing; Yang, Zhifa; Qiao, Feiyan

    2013-03-01

    Concerning the problem of road traffic safety, remote monitoring and early-warning of vehicle states was the key to prevent road traffic accidents and improve the transportation effectiveness. Through the embedded development technology, a remote vehicle monitoring and early-warning system was developed based on UNO2170 industrial computer of Advantech with WinCE operating system using Embedded Visual C++ (EVC), which combined with multisensor data acquisition technology, global positioning system (GPS) and general packet radio service (GPRS). It achieved the remote monitoring and early-warning of commercial vehicle. This system was installed in a CA1046L2 light truck. Through many road tests, test results showed that the system reacted rapidly for abnormal vehicle states and had stable performance.

  16. FY2015 Vehicle Systems Annual Progress Report

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2016-01-31

    The Vehicle Systems research and development (R&D) subprogram within the DOE Vehicle Technologies Office (VTO) provides support and guidance for many cutting-edge automotive technologies under development. Research focuses on addressing critical barriers to advancing light-, medium-, and heavy-duty vehicle systems to help maximize the number of electric miles driven and increase the energy efficiency of transportation vehicles.

  17. TRACKED VEHICLE Rev 75

    Energy Technology Data Exchange (ETDEWEB)

    2007-05-08

    Revision 75 of the Tracked Vehicle software is a soft real-time simulation of a differentially steered, tracked mobile robot, which, because of the track flippers, resembles the iRobot PackBot (http://www.irobot.com/). Open source libraries are used for the physics engine (http://www.ode.org/), the display and user interface (http://www.mathies.com/cpw/), and the program command line and configuration file parameters (http://www.boost.org/). The simulation can be controlled by a USB joystick or the keyboard. The configuration file contains demonstration model parameters of no particular vehicle. This simulation can be used as a starting point for those doing tracked vehicle simulations. This simulation software is essentially a research tool which can be modified and adapted for certain types of tracked vehicle research. An open source license allows an individual researchers to tailor the code to their specific research needs.

  18. Analysis of the longitudinal handling qualities and pilot-induced-oscillation tendencies of the High-Angle-of-Attack Research Vehicle (HARV)

    Science.gov (United States)

    Hess, Ronald A.

    1994-01-01

    The NASA High-Angle-of Attack Research Vehicle (HARV), a modified F-18 aircraft, experienced handling qualities problems in recent flight tests at NASA Dryden Research Center. Foremost in these problems was the tendency of the pilot-aircraft system to exhibit a potentially dangerous phenomenon known as a pilot-induced oscillation (PIO). When they occur, PIO's can severely restrict performance, sharply dimish mission capabilities, and can even result in aircraft loss. A pilot/vehicle analysis was undertaken with the goal of reducing these PIO tendencies and improving the overall vehicle handling qualities with as few changes as possible to the existing feedback/feedforward flight control laws. Utilizing a pair of analytical pilot models developed by the author, a pilot/vehicle analysis of the existing longitudinal flight control system was undertaken. The analysis included prediction of overall handling qualities levels and PIO susceptability. The analysis indicated that improvement in the flight control system was warranted and led to the formulation of a simple control stick command shaping filter. Analysis of the pilot/vehicle system with the shaping filter indicated significant improvements in handling qualities and PIO tendencies could be achieved. A non-real time simulation of the modified control system was undertaken with a realistic, nonlinear model of the current HARV. Special emphasis was placed upon those details of the command filter implementation which could effect safety of flight. The modified system is currently awaiting evaluation in the real-time, pilot-in-the-loop, Dual-Maneuvering-Simulator (DMS) facility at Langley.

  19. 基于建模仿真的战车分类算法研究%Research on the Military Vehicle Classification Algorithm Based on Modeling and Simulation

    Institute of Scientific and Technical Information of China (English)

    马云飞

    2014-01-01

    Recognition and classification of military vehicle is an important research content of information acquirement in battlefield. In order to collect data and study military vehicle classification algorithm, real external field experiment mode is popularly used, however it needs long time and expensive costs. In this paper, the tank model, armored vehicle model and truck model are built in the virtual battlefield simulation platform. The noise signals, magnetic field signals and vibration signals of the military vehicles in simulation environment are collected and used as the sample data for the research of military vehicle classification algorithm. In the same time this paper designs a classification algorithm of military vehicle based on the one-to-one multi-class SVM, and gives out an adjustment strategy for classifier parameters based on the cross-validation method. The experiment results show that, compared to AdaBoost algorithm, the present algorithm has higher classification accuracy on military vehicles.%战车类型的识别分类是现代情报获取的重要研究内容。为了获得数据并研究战车分类算法,常进行外场真实实验,但其时间长、耗资巨大。本文在虚拟战场仿真平台上建立坦克、装甲车、运兵车三种战车模型。利用仿真环境中的战车噪声、磁场、振动特征信号作为样本数据,进行战车的分类算法研究。同时基于一对一多分类支持向量机,设计了一种战车分类算法,并给出了分类器交叉验证参数调整策略。实验表明,相比于AdaBoost算法,文章提出的战车分类算法的分类准确率较高。

  20. Research on the theory and application of adsorbed natural gas used in new energy vehicles: A review

    Science.gov (United States)

    Nie, Zhengwei; Lin, Yuyi; Jin, Xiaoyi

    2016-09-01

    Natural gas, whose primary constituent is methane, has been considered a convincing alternative for the growth of the energy supply worldwide. Adsorbed natural gas (ANG), the most promising methane storage method, has been an active field of study in the past two decades. ANG constitutes a safe and low-cost way to store methane for natural gas vehicles at an acceptable energy density while working at substantially low pressures (3.5-4.0 MPa), allowing for conformable store tank. This work serves to review the state-of-the-art development reported in the scientific literature on adsorbents, adsorption theories, ANG conformable tanks, and related technologies on ANG vehicles. Patent literature has also been searched and discussed. The review aims at illustrating both achievements and problems of the ANG technologies- based vehicles, as well as forecasting the development trends and critical issues to be resolved of these technologies.

  1. Research on the application of PPP model in the Chinese construction and operation of new energy vehicle charging facilities

    Science.gov (United States)

    Zhu, Liping

    2017-05-01

    New energy car charging equipment is the development and popularization of new energy vehicles. It has the nature of quasi-public goods. Due to the large number of construction projects, wide distribution, big investment, it needs huge sums of money. PPP mode is a new financing model and has the inherent driving force to lead the idea the technology and the system innovation. The government and the social subject cooperate on the basis of the spirit of contract thus achieve benefit sharing. This mode effectively improve the operation of new energy vehicle charging facilities operating efficiency

  2. Electric vehicles

    Science.gov (United States)

    1990-03-01

    Quiet, clean, and efficient, electric vehicles (EVs) may someday become a practical mode of transportation for the general public. Electric vehicles can provide many advantages for the nation's environment and energy supply because they run on electricity, which can be produced from many sources of energy such as coal, natural gas, uranium, and hydropower. These vehicles offer fuel versatility to the transportation sector, which depends almost solely on oil for its energy needs. Electric vehicles are any mode of transportation operated by a motor that receives electricity from a battery or fuel cell. EVs come in all shapes and sizes and may be used for different tasks. Some EVs are small and simple, such as golf carts and electric wheel chairs. Others are larger and more complex, such as automobile and vans. Some EVs, such as fork lifts, are used in industries. In this fact sheet, we will discuss mostly automobiles and vans. There are also variations on electric vehicles, such as hybrid vehicles and solar-powered vehicles. Hybrid vehicles use electricity as their primary source of energy, however, they also use a backup source of energy, such as gasoline, methanol or ethanol. Solar-powered vehicles are electric vehicles that use photovoltaic cells (cells that convert solar energy to electricity) rather than utility-supplied electricity to recharge the batteries. These concepts are discussed.

  3. Development of an end-of-life vehicle recovery model using system dynamics and future research needs

    Science.gov (United States)

    Mohamad-Ali, N.; Ghazilla, R. A. R.; Abdul-Rashid, S. H.; Sakundarini, N.; Ahmad-Yazid, A.; Stephenie, L.

    2017-06-01

    The implementation of end-of-life vehicle (ELV) recovery policy in Malaysia has led vehicle manufacturers to look at different ways to improve design and development of vehicles. Nowadays, it is crucial to incorporate end-of-life (EOL) design strategies into the vehicle design in order to enhance the effectiveness of the ELV recovery network. Although recent studies have shown that product design has a significant effect on the product recovery rate, there is a lack of studies on how EOL design strategies affects the effectiveness of ELV recovery, particularly when there are dynamic changes in the behaviour of the product recovery network. Thus, in this study, we developed a preliminary model based on the system dynamics approach in order to predict the effectiveness of ELV recovery in response to dynamic changes of various factors (including EOL design strategies) in the business environment. We developed this model based on preliminary data that we had gathered from unstructured interviews with the key stakeholders of ELV management in Malaysia. We believe that our model will greatly benefit product designers in incorporating the appropriate EOL design strategies in order to boost ELV recovery effectiveness in Malaysia.

  4. Research, development, and demonstration of nickel-zinc batteries for electric vehicle propulsion. Annual report for 1980

    Energy Technology Data Exchange (ETDEWEB)

    1981-03-01

    Progress in developing nickel-zinc batteries for propelling electric vehicles is reported. Information is included on component design, battery fabrication, and module performance testing. Although full scale hardware performance has fallen short of the contract cycle life goals, significant progress has been made to warrant further development. (LCL)

  5. Multi-Domain Modeling and Simulation of an Aircraft System for Advanced Vehicle-Level Reasoning Research and Development

    Directory of Open Access Journals (Sweden)

    : F. Khan

    2014-05-01

    Full Text Available In this paper, we describe a simulation based health monitoring system test-bed for aircraft systems. The purpose of the test-bed is to provide a technology neutral basis for implementing and evaluation of reasoning systems on vehicle level and software architecture in support of the safety and maintenance process. This simulation test-bed will provide the sub-system level results and data which can be fed to the VLRS to generate vehicle level reasoning to achieve broader level diagnoses. This paper describes real-time system architecture and concept of operations for the aircraft major sub-systems. The four main components in the real-time test-bed are the aircraft sub-systems (e.g. battery, fuel, engine, generator, heating and lighting system simulation model, fault insertion unit, health monitoring data processing and user interface. In this paper, we adopted a component based modelling paradigm for the implementation of the virtual aircraft systems. All of the fault injections are currently implemented via software. The fault insertion unit allows for the repeatable injection of faults into the system. The simulation test-bed has been tested with many different faults which were undetected on system level to process and detect on the vehicle level reasoning. This article also shows how one system fault can affect the overall health of the vehicle.

  6. Handbook of Intelligent Vehicles

    CERN Document Server

    2012-01-01

    The Handbook of Intelligent Vehicles provides a complete coverage of the fundamentals, new technologies, and sub-areas essential to the development of intelligent vehicles; it also includes advances made to date, challenges, and future trends. Significant strides in the field have been made to date; however, so far there has been no single book or volume which captures these advances in a comprehensive format, addressing all essential components and subspecialties of intelligent vehicles, as this book does. Since the intended users are engineering practitioners, as well as researchers and graduate students, the book chapters do not only cover fundamentals, methods, and algorithms but also include how software/hardware are implemented, and demonstrate the advances along with their present challenges. Research at both component and systems levels are required to advance the functionality of intelligent vehicles. This volume covers both of these aspects in addition to the fundamentals listed above.

  7. Nuclear air cushion vehicles.

    Science.gov (United States)

    Anderson, J. L.

    1973-01-01

    This paper serves several functions. It identifies the 'state-of-the-art' of the still-conceptual nuclear air cushion vehicle, particularly the nuclear powerplant. Using mission studies and cost estimates, the report describes some of the advantages of nuclear power for large air cushion vehicles. The paper also summarizes the technology studies on mobile nuclear powerplants and conceptual ACV systems/missions studies that have been performed at NASA Lewis Research Center.

  8. Electric vehicles in action

    OpenAIRE

    Wikström, Martina

    2015-01-01

    This thesis analyses the political and practical conditions for introducing electric vehicles in Swedish public authorites and discusses the potential for using electric vehicles in public transport and public fleets. The work has been carried out using an interdisciplinary research approach. Such an approach brings new insights to energy studies; the combination of technical methods and methods from social science allows the technology to be studied in its societal context. Local self-govern...

  9. Vehicle Routing in Practice

    OpenAIRE

    Hasle, Geir

    2010-01-01

    Solving the Vehicle Routing Problem (VRP) is a key to efficiency in transportation and supply chain management. The VRP is a computationally hard problem that comes in many guises. The VRP literature contains thousands of papers, and VRP research is regarded as one of the great successes of OR. In industry and the public sector, vehicle routing tools provide substantial savings every day. An industry of routing tool vendors has emerged. Exact optimization methods of today cannot consistently ...

  10. Cerebral PET glucose hypometabolism in subjects with mild cognitive impairment and higher EEG high-alpha/low-alpha frequency power ratio.

    Science.gov (United States)

    Moretti, Davide Vito; Pievani, Michela; Pini, Lorenzo; Guerra, Ugo Paolo; Paghera, Barbara; Frisoni, Giovanni Battista

    2017-10-01

    In Alzheimer's disease (AD) research, both 2-deoxy-2-((18)F)fluoro-D-glucose (FDG) positron emission tomography (PET) and electroencephalography (EEG) are reliable investigational modalities. The aim of this study was to investigate the associations between EEG High-alpha/Low-alpha (H-alpha/L-alpha) power ratio and cortical glucose metabolism. A total of 23 subjects with mild cognitive impairment (MCI) underwent FDG-PET and EEG examinations. H-alpha/L-alpha power ratio was computed for each subject and 2 groups were obtained based on the increase of the power ratio. The subjects with higher H-alpha/L-alpha power ratio showed a decrease in glucose metabolism in the hub brain areas previously identified as typically affected by AD pathology. In subjects with higher H-alpha/L-alpha ratio and lower metabolism, a "double alpha peak" was identified in the EEG spectrum and a U-shaped correlation between glucose metabolism and increase of H-alpha/L-alpha power ratio has been found. Moreover, in this group, a conversion rate of 62.5% at 24 months was detected, significantly different from the chance percentage expected. The neurophysiological meaning of the interplay between alpha oscillations and glucose metabolism and the possible interest of the H-alpha/L-alpha power ratio as a clinical biomarker in AD have been discussed. Copyright © 2017 Elsevier Inc. All rights reserved.

  11. Intelligent Vehicle Health Management

    Science.gov (United States)

    Paris, Deidre E.; Trevino, Luis; Watson, Michael D.

    2005-01-01

    As a part of the overall goal of developing Integrated Vehicle Health Management systems for aerospace vehicles, the NASA Faculty Fellowship Program (NFFP) at Marshall Space Flight Center has performed a pilot study on IVHM principals which integrates researched IVHM technologies in support of Integrated Intelligent Vehicle Management (IIVM). IVHM is the process of assessing, preserving, and restoring system functionality across flight and ground systems (NASA NGLT 2004). The framework presented in this paper integrates advanced computational techniques with sensor and communication technologies for spacecraft that can generate responses through detection, diagnosis, reasoning, and adapt to system faults in support of INM. These real-time responses allow the IIVM to modify the affected vehicle subsystem(s) prior to a catastrophic event. Furthermore, the objective of this pilot program is to develop and integrate technologies which can provide a continuous, intelligent, and adaptive health state of a vehicle and use this information to improve safety and reduce costs of operations. Recent investments in avionics, health management, and controls have been directed towards IIVM. As this concept has matured, it has become clear the INM requires the same sensors and processing capabilities as the real-time avionics functions to support diagnosis of subsystem problems. New sensors have been proposed, in addition, to augment the avionics sensors to support better system monitoring and diagnostics. As the designs have been considered, a synergy has been realized where the real-time avionics can utilize sensors proposed for diagnostics and prognostics to make better real-time decisions in response to detected failures. IIVM provides for a single system allowing modularity of functions and hardware across the vehicle. The framework that supports IIVM consists of 11 major on-board functions necessary to fully manage a space vehicle maintaining crew safety and mission

  12. Research on Business Model of Vehicle Connectivity%车联网商业模式分析与研究

    Institute of Scientific and Technical Information of China (English)

    李步峰; 江勇; 崔有祥

    2014-01-01

    As the new area of modern service industry, the vehicle connectivity is attracting worldwide attention, because of more involved areas by the vehicle connectivity industry, and much more pulling function for the economy growth. The very important thing for promoting the vehicle connectivity industry is how to establish proiftable business model. The paper introduces the existing business model ifrstly, and then analyzes the non-proift reason of the industry;at last proposes that big data marketing service on the basis of CRM and DMS, which is the proiftable business model of vehicle connectivity, by means of O2O and focusing on driver’s service need.%作为现代服务业新兴领域的车联网,因涉及产业领域众多、产业带动作用强而倍受关注。如何建立车联网有效商业模式是推动产业发展中非常重要的内容。本文在介绍现有车联网商业模式的基础上,做了简要原因分析,并提出车联网商业模式应是通过O2O方式围绕车主服务的CRM(客户关系管理)+DMS(供应商渠道管理)的大数据营销服务。

  13. Combining stated and revealed choice research to simulate the neighbor effect: The case of hybrid-electric vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Axsen, Jonn [Institute of Transportation Studies, Univ. of California at Davis, 2028 Academic Surge, One Shields Avenue, Davis, CA 95616 (United States); Mountain, Dean C. [DeGroote School of Business, McMaster Univ., 1280 Main Street West, Hamilton, ON L8S 4M4 (Canada); Jaccard, Mark [School of Resource and Environmental Management, Simon Fraser Univ., 8888 Univ. Drive, Burnaby, BC V5A 1S6 (Canada)

    2009-08-15

    According to intuition and theories of diffusion, consumer preferences develop along with technological change. However, most economic models designed for policy simulation unrealistically assume static preferences. To improve the behavioral realism of an energy-economy policy model, this study investigates the ''neighbor effect'', where a new technology becomes more desirable as its adoption becomes more widespread in the market. We measure this effect as a change in aggregated willingness to pay under different levels of technology penetration. Focusing on hybrid-electric vehicles (HEVs), an online survey experiment collected stated preference (SP) data from 535 Canadian and 408 Californian vehicle owners under different hypothetical market conditions. Revealed preference (RP) data was collected from the same respondents by eliciting the year, make and model of recent vehicle purchases from regions with different degrees of HEV popularity: Canada with 0.17% new market share, and California with 3.0% new market share. We compare choice models estimated from RP data only with three joint SP-RP estimation techniques, each assigning a different weight to the influence of SP and RP data in coefficient estimates. Statistically, models allowing more RP influence outperform SP influenced models. However, results suggest that because the RP data in this study is afflicted by multicollinearity, techniques that allow more SP influence in the beta estimates while maintaining RP data for calibrating vehicle class constraints produce more realistic estimates of willingness to pay. Furthermore, SP influenced coefficient estimates also translate to more realistic behavioral parameters for CIMS, allowing more sensitivity to policy simulations. (author)

  14. Research on smart unmanned aerial vehicle encoding%小型无人机航线编制研究

    Institute of Scientific and Technical Information of China (English)

    敖杰刚; 吴启文

    2012-01-01

    At present, smart unmanned aerial vehicle stays the initial but rapid development step in China. The control to it reflects in not only its hardware, but also the operation and control skills. The article summarized the smart unmanned aerial vehicle flight control in the range of "world range" with the basic of Google' s 3D data based on Google Earth COM API and KML It mainly described the methods and display of airline and airpoint, offered convenient "add-edit-modify-delete" functions for airline and truly gave a well projection for the flight control of present smart unmanned aerial vehicle.%小型无人机飞行技术目前在国内处于初步但迅速发展时期,对无人机的控制不仅体现在本身的硬件性能上,更体现在对其的操纵控制技术上.本文概述基于Google Earth COM API和KML的无人机飞行控制:在Google的三维数据基础上,实现“世界范围”内的飞行控制,具体描述航线航点的编码绘制方法与显示,提供便利的航线添加编辑修改删除等功能.

  15. Research on US navy carrier vehicle and group navigation system%美国海军航母及编队导航系统分析

    Institute of Scientific and Technical Information of China (English)

    宿勇; 郭隆华

    2012-01-01

    This paper researchs on US navy carrier vehicle and group navigation system's core-navigation sensor system interface ( NAVSSI) , consist of system configuration and main functions, analyzes US navy carrier vehicle and group navigation system's information security issues and total information flow, which consist of data input, data inspect, data process and data distribute. Finally, summarize US navy carrier vehicle and group navigation system's characteristic.%重点研究美国航母及编队导航系统的核心——导航传感器系统接口(NAVSSI)的系统构成及主要功能,分析美国航母及编队导航系统从数据输入、数据检查、数据处理到数据分发的整个信息流程及信息安全问题,并总结美国航母及编队导航系统的特点.

  16. 车—桥碰撞的数值模拟研究%Research on numeric simulation of crash between vehicle and bridges

    Institute of Scientific and Technical Information of China (English)

    邓乙民; 刘吉波

    2012-01-01

    利用有限元分析软件ANSYS/LS-DYNA,建立了汽车—桥墩碰撞的有限元模型,通过对汽车—桥墩的碰撞过程进行数值模拟分析,得到了碰撞过程中的碰撞力、碰撞能量和桥墩墩顶位移,分析了桥墩受撞破坏的机理,对车—桥碰撞研究具有十分重要的意义。%The paper adopts the finite element analysis software,ANSYS/LS-DYNA,establishes the finite element model for the crash between the vehicle and bridge piers,analyzes the numeric simulation the crashing process between the vehicle and bridge piers,achieves the collision force,crashing energy and the displacement of pier top of the bridge piers,and analyzes the mechanism for the damage of the bridge piers,so as to have the important significance for the research on crash between vehicle and bridges.

  17. Being There & Getting Back Again: Half a Century of Deep Ocean Research & Discovery with the Human Occupied Vehicle "Alvin"

    Science.gov (United States)

    German, C. R.; Fornari, D. J.; Fryer, P.; Girguis, P. R.; Humphris, S. E.; Kelley, D. S.; Tivey, M.; Van Dover, C. L.; Von Damm, K.

    2012-12-01

    In 2013, Alvin returns to service after significant observational and operational upgrades supported by the NSF, NAVSEA & NOAA. Here we review highlights of the first half-century of deep submergence science conducted by Alvin, describe some of the most significant improvements for the new submarine and discuss the importance of these new capabilities for 21st century ocean science and education. Alvin has a long history of scientific exploration, discovery and intervention at the deep seafloor: in pursuit of hypothesis-driven research and in response to human impacts. One of Alvin's earliest achievements, at the height of the Cold War, was to help locate & recover an H-bomb in the Mediterranean, while the last dives completed, just ahead of the current refit, were to investigate the impacts of the Deep Water Horizon oil spill. Alvin has excelled in supporting a range of Earth & Life Science programs including, in the late 1970s, first direct observations and sampling of deep-sea hydrothermal vents and the unusual fauna supported by microbial chemosynthesis. The 1980s saw expansion of Alvin's dive areas to newly discovered hot-springs in the Atlantic & NE Pacific, Alvin's first dives to the wreck of RMS Titanic and its longest excursions away from WHOI yet, via Loihi Seamount (Hawaii) to the Mariana Trench. The 1990s saw Alvin's first event-response dives to sites where volcanic eruptions had just occurred at the East Pacific Rise & Juan de Fuca Ridge while the 2000s saw Alvin discover novel off-axis venting at Lost City. Observations from these dives fundamentally changed our views of volcanic and microbial processes within young ocean crust and even the origins of life! In parallel, new deep submergence capabilities, including manipulative experiments & sensor development, relied heavily on testing using Alvin. Recently, new work has focused on ocean margins where fluid flow from the seafloor results in the release of hydrocarbons and other chemical species that

  18. 电动汽车动力电池组热管理系统研究%Research On Electric Vehicle Battery Thermal Management System

    Institute of Scientific and Technical Information of China (English)

    杨国胜

    2015-01-01

    相比较传统燃油汽车,电动汽车具有更加高效、更加清洁的优点。电动汽车工作性能的好坏很大程度上取决于电池的工作性能。温度作为影响电池工作性能的重要因素,对电动汽车的使用性和安全性有着非常大的影响。在简要归纳动力电池组热管理必要性和系统功能的前提下,从电池最优工作温度范围、热场计算、温度传感器布置、风机功率选择和电池包设计等几个方面介绍了动力电池组热管理系统的设计要点,并对不同冷却方式进行对比分析,为后续研究提供参考。%Compared with the traditional fuel vehicle,electric vehicle had advantages on more effective and more clear.The electric vehicle's performance was mostly decided by battery's performance.As the main influence factor of battery's performance,battery temperature had significant effect on electric vehicle's usability and safety.On the basis of briefly summarizing the necessity and function of power battery thermal management system,this paper introduced the key design points of battery thermal management system from optimum operating temperature range,heat field calculation,temperature sensor decorate,fan power selection and battery pack design.Then analyzed different cooling systems,provided a reference for further research.

  19. Vehicle dynamics theory and application

    CERN Document Server

    Jazar, Reza N

    2017-01-01

    This intermediate textbook is appropriate for students in vehicle dynamics courses, in their last year of undergraduate study or their first year of graduate study. It is also appropriate for mechanical engineers, automotive engineers, and researchers in the area of vehicle dynamics for continuing education or as a reference. It addresses fundamental and advanced topics, and a basic knowledge of kinematics and dynamics, as well as numerical methods, is expected. The contents are kept at a theoretical-practical level, with a strong emphasis on application. This third edition has been reduced by 25%, to allow for coverage over one semester, as opposed to the previous edition that needed two semesters for coverage. The textbook is composed of four parts: Vehicle Motion: covers tire dynamics, forward vehicle dynamics, and driveline dynamics Vehicle Kinematics: covers applied kinematics, applied mechanisms, steering dynamics, and suspension mechanisms Vehicle Dynamics: covers applied dynamics, vehicle planar dynam...

  20. 基于DMEA的航空地面电源车战场损伤研究%Battlefield Damage Research of Aerial Power Supply Vehicle Based on DMEA

    Institute of Scientific and Technical Information of China (English)

    张洋铭; 韩固勇; 罗广旭; 林中军

    2013-01-01

    The battlefield damage research of equipment is the important content of equipment service and performance improvement. Damage mode and effects analysis in battlefield damage research method was introduced. The analysis method was applied in battlefield damage research of aerial power supply vehicle. The mode and effects of the aerial power supply vehicle were analyzed and the corresponding maintaining method was put forward. The purpose was to provide guidance for battlefield repair.%  装备的战场损伤研究是装备维修以及性能改进的重要内容。文中主要介绍了战场损伤研究方法中的损坏模式及影响分析方法,并将此方法应用于航空地面电源车的战场损伤研究,提出了其战场损伤的主要模式及影响分析,并根据损伤模式提出了相应的抢修方案,为其战场抢修工作提供了一定的指导。

  1. Research for Routing Planning of Vehicle Transportation%车辆运输路径规划问题研究

    Institute of Scientific and Technical Information of China (English)

    于锐; 曹介南; 朱培栋

    2011-01-01

    In order to better resolve the vehicle routing planning problem of armed police transportation, and increase the rapidity of military operations,the open vehicle routing problem(OVRP) model is constituted on the base of actual request of armed police transportation, which adds a good many limited conditions, such as vehicle capacity and time window restraint etc. At the same time, the basic principle of the saving algorithm is described,and this question was resolved using an improved saving algorithm. The more satisfactory answer is got through the verification of actual case. Not only can the time limit be met,but also the transport distance and transport charge are reduced. It is shown that this arithmetic is concise,comprehensible and operable.%为了更好地解决武警车辆运输路径规划问题,提高部队行动的迅速性,在考虑武警车辆运输实际需求的基础上,文中建立了开放式车辆路径模型,增加了诸多约束条件.例如车辆容量限制、时间窗限制等等.同时,论述了节约算法的基本原理,并采用设计改进的节约算法对开放式车辆路径问题进行了求解.通过实际案例的验证,采用改进的节约算法能够得到较满意的解,既能够满足时间限制,又能够节约运输里程和费用.结果表明,此种算法简明、易于理解,且可操作性强.

  2. Research of Vehicle Routing Problem Based on Fuzzy Time Windows%基于模糊时间窗的车辆调度问题研究

    Institute of Scientific and Technical Information of China (English)

    王旭坪; 张凯; 胡祥培

    2011-01-01

    An increasing number of enterprises are focusing on the vehicle routing problems (VRP) because of expanded logistics support. VRP belongs to typical NP-Hard problems. An enterprise typically spends 25% to 30% of total expenses on vehicle routing problems because they can affect economic efficiency and customer benefits. Therefore, it is important to research VRP and optimize logistics activities.Exiting literature has focused on the vehicle routing problem with hard time and soft time windows. In the VRP with hard time window, the service time must fall within each customer' s time window. Due to the limitation of hard time window and the number of available vehicles, it is often unable to find feasible schedules. To deal with issues pertaining to the violation of time window, researchers have proposed the concept of "soft time window". In the VRP with soft time window, a penalty cost is added once a time window is violated, and the penalty cost is often assumed to be linear with the degree of violation. In some cases, violation of time window does not directly incur any penalty cost, although the satisfaction levels of customers may drop and lead to benefit loss in the long term. In many realistic applications, the hard time window or soft time window does represent customer requirements very well. Under these circumstances, the fuzzy processing of time window can reflect customers' requirements well and truly. Until now, few studies have addressed VRP-with fuzzy time window when the number of vehicle is limited. There are many real-life situations where the number of vehicle is limited, such as logistics distribution, post express and so on. Thus, this paper proposes and solves vehicle routing problems based on the fuzzy time window and a definite number of vehicles. In this paper, a fuzzy membership function is used to characterize customers' satisfaction levels by analyzing customers' practical requirements of the service time window.A multi-objective model

  3. 在用汽油车排气污染物的研究%Gasoline Vehicle Exhaust Pollutants in Research

    Institute of Scientific and Technical Information of China (English)

    王瑞

    2014-01-01

    With the continued growth of car ownership, vehicle emission pollution has become a major source of air pollution, while emissions of pollutants controlled car is one of the effective ways to reduce air pollution.%随着汽车保有量的持续增长,汽车排放污染已经成为大气污染的主要来源,而控制汽车污染物的排放是降低大气污染的有效方法之一。

  4. 车辆阻力对站线坡度设计的影响研究%Research on Influences of Vehicle Resistance on Station Line Grade Design

    Institute of Scientific and Technical Information of China (English)

    李长淮

    2016-01-01

    The vehicle unit basic resistance model is established together with its mathematic expression on the basis of basic resistance, curve resistance, ramp resistance, wind resistance and switch resistance undertaken by vehicles. Vehicle parameters and wind resistance parameters are used to analyze and calculate vehicle-related conditions. Research results show that all longitudinal grades even a flat one may give rise to potential slipping and measures must be taken to ensure safety. This paper evaluates the standard of station line longitudinal grade stipulated in Yard Specification, puts forward measures and calculation method to improve vehicle parking by means of stop retarders. Retarders can be used to increase longitudinal grade of the loading line to meet the requirement for quantitative and fast loading or that for rail weighbridge measurement system, which makes contribution to provide the basis for line longitudinal slope design, extend the application of station speed regulating device and innovate the engineering design method, and to serve as a theoretical basis for the engineering comprehensive optimization design and as reference for design and calculation.%根据车辆所受基本阻力、曲线阻力、坡道阻力、风阻力、道岔阻力,建立车辆单位基本阻力模型及数学表达式,运用车辆参数及风阻力参数,对车辆相关状态进行分析计算,研究表明:线路纵坡即使为平坡,亦存在溜逸安全隐患,必须采取措施才能保证安全;对《站规》站线纵坡标准,进行安全评估,提出利用停车顶改善车辆停放状态的措施意见及计算办法;利用减速顶做功耗能可以提高装车线线路纵坡,从而满足定量快速装车或轨道衡计量系统的技术要求,为线路纵坡设计提供依据,拓宽站场调速设备应用领域,创新工程设计方法,为工程综合优化设计提供理论基础,供设计分析及计算参考。

  5. 基于多Agent的物流车辆调度系统研究%Research of Logistics Vehicle Scheduling System Based on Multi-Agent

    Institute of Scientific and Technical Information of China (English)

    展翔

    2013-01-01

    The rapid development of Internet and information technology to promote the rapid development of logistics indus-try, new technology application in the logistics scheduling, such as the Internet of things will logistics vehicle scheduling system and storage management information system for data exchange, and completed in vehicle scheduling, making the maximum effi-ciency of logistics. This paper from the logistics vehicle scheduling strategy and optimization algorithm, multiple Agent logistics vehicle scheduling system, the realization of the logistics vehicles dispatching system are carried out from three aspects: research, integrated the C- W algorithm and heuristic scheduling algorithms and their role in logistics scheduling policy, put forward its own logistics scheduling policy. Using the results of multi Agent technology, design the logistics scheduling system based on mul-tiple Agent based interface and the business logic of the application logic, four most intelligent Agent, Agent of logistics schedul-ing system architecture.%互联网和信息技术的高速发展推动物流行业的快速发展,物联网等新技术应用于物流调度将物流车辆调度系统与存储管理信息系统等进行数据交换,并协同完成车辆调度,使得物流的效率最大化。该文从物流车辆调度策略及优化算法,多Agent的物流车辆调度系统,物流车辆调度系统的实现等三个方面展开了研究,综合C-W算法和启发式调度算法以及他们在物流调度策略的作用,提出了自己的物流调度策略。利用多Agent技术的成果,设计出基于多Agent的物流调度系统的业务逻辑、应用逻辑、基础接口和智能代理四大部分,完成多Agent的物流调度系统的体系结构。

  6. Abandoned vehicles

    CERN Multimedia

    Relations with the Host States Service

    2004-01-01

    The services in charge of managing the CERN site have recently noted an increase in the number of abandoned vehicles. This poses a risk from the point of view of safety and security and, on the eve of several important events in honour of CERN's fiftieth anniversary, is detrimental to the Organization's image. Owners of vehicles that have been left immobile for some time on the CERN site, including on the external car park by the flags, are therefore invited to contact the Reception and Access Control Service (service-parking-longterm@cern.ch) before 1st October 2004 and, where appropriate, move their vehicle to a designated long-term parking area. After this date, any vehicle whose owner has failed to respond to this request and which is without a number plate, has been stationary for several weeks or is out of service, may be impounded at the owner's risk and expense. Relations with the Host States Service Tel. 72848

  7. 汽车振动系统的分析研究%Research of the vehicle vibration system

    Institute of Scientific and Technical Information of China (English)

    左万里; 苏小平; 田海兰

    2011-01-01

    A seven-degrees-of-freedom dynamic model of the car which front wheel with independent suspension and rear wheel with dependent suspension is presented, then the mss parameters and movement characteristics parameters that the model need is given. According to the differential equations of motion,the vibration acceleration diagram of vehicle body is obtained via simulation analysis. The results showed that the dynamic model of vehicle vibration system is reasonable.%建立前轮为独立悬架,后轮为非独立悬架汽车的七自由度动力学模型,并给出该模型所需要的质量特性与运动学特性参数.由给出的运动微分方程,利用仿真分析得出车身的振动加速度图.研究结果表明,建立的汽车振动系统动力学模型是有合理的.

  8. 导弹发射车战场抢修研究%Research on Battlefield Repair for Missile Launch Vehicle

    Institute of Scientific and Technical Information of China (English)

    李田科; 于仕财; 于乐; 李建

    2011-01-01

    It analyzed battlefield damage of launch vehicle by method of BFIA,DMEA,DTA,DLA,and built the basic function item trees and damage trees for primary functional parts to establish the damage mode with minimum conventional level and the ultimate effect.It is effective way to acquire damage assessment information and laid a foundation for establishing the BDAR database of launch vehicle.%综合利用基本功能项目分析、损伤模式及影响分析、损伤树分析及损伤定位分析等方法进行了发射车的战场损伤分析,建立了基本功能项目树和主要功能部件的损伤树,确定了最低约定层次的损伤模式及最终影响。该方法是获取导弹发射车损伤评估信息的有效途径,可为建立发射车战场抢修数据库打下理论基础。

  9. Research, development, and demonstration of lead-acid batteries for electric vehicle propulsion. Annual report for 1980

    Energy Technology Data Exchange (ETDEWEB)

    1981-03-01

    Work performed during Oct. 1, 1979 to Sept. 30, 1980 for the development of lead-acid batteries for electric vehicle propulsion is described. During this report period many of the results frpm Globe Battery's design, materials and process development programs became evident in the achievement of the ISOA (Improved State of Art) specific energy, specific power, and energy efficiency goals while testing in progress also indicates that the cycle life goal can be met. These programs led to the establishment of a working pilot assembly line which produced the first twelve volt ISOA modules. Five of these modules were delivered to the National Battery Test Laboratory during the year for capacity, power and life testing, and assembly is in progress of three full battery systems for installation in vehicles. In the battery subsystem area, design of the acid circulation system for a ninety-six volt ISOA battery pack was completed and assembly of the first such system was initiated. Charger development has been slowed by problems encountered with reliability of some circuits but a prototype unit is being prepared which will meet the charging requirements of our ninety-six volt pack. This charger will be available during the 1981 fiscal year.

  10. Research of Delivery Towing methods for Metro Vehicles%地铁车辆回送方法的研究

    Institute of Scientific and Technical Information of China (English)

    厉砚磊; 何宝昌

    2012-01-01

    制动系统是城市轨道交通车辆的关键系统之一,其工作可靠性直接关系到列车的运行安全。回送试验是保证地铁车辆安全押运的重要环节,本文阐述了地铁车辆各个制动系统的回送工作原理、回送管路铺设和连接方法,并总结了地铁车辆在回送试验和押运过程中的注意事项。%As a critical system for urban rail transit vehicle, the brake system involves the reliable and safe operation of a train, and delivery towing testing is therefore a necessary step for the safe transportation of metro vehicles. This paper outlines the principles of various brake system used in metro cars, laying and connection of temporary brake pipes during the delivery towing operation, along with the precautions which should be taken for the transportation.

  11. Vehicle Sprung Mass Estimation for Rough Terrain

    Science.gov (United States)

    2011-03-01

    drivetrain controllers. These autonomous systems and controllers schedule gear shifts, actuate brakes, induce steer, schedule fuel injection, warn...longitudinal vehicle dynamics, drivetrain shuffle dynamics, or combined lateral, yaw, and roll dynamics to estimate the vehicle mass. Despite the research

  12. Chemiluminescent methods and instruments for monitoring of the atmosphere and satellite validation on board of research aircrafts and unmanned aerial vehicles

    Science.gov (United States)

    Sitnikov, Nikolay; Borisov, Yuriy; Akmulin, Dimitry; Chekulaev, Igor; Sitnikova, Vera; Ulanovsky, Alexey; Sokolov, Alexey

    The results of development of instruments based on heterophase chemiluminescence for measurements of space distribution of ozone and nitrogen oxides concentrations on board of research aircrafts and unmanned aerial vehicles carried out in Central Aerological Observatory are presented. Some results of atmospheric investigations on board of research aircrafts M55 “Geophysica” (Russia) and “Falcon” (Germany) carried out using developed instruments in frame of international projects are demonstrated. Small and low power instruments based on chemiluminescent principle for UAV are developed. The results of measurements on board of UAV are shown. The development can be used for satellite data validation, as well as operative environmental monitoring of contaminated areas in particular, chemical plants, natural and industrial disasters territories, areas and facilities for space purposes etc.

  13. Research and Development of Hybrid Electric Vehicles CAN-Bus Data Monitor and Diagnostic System through OBD-II and Android-Based Smartphones

    Directory of Open Access Journals (Sweden)

    Yalian Yang

    2013-01-01

    Full Text Available With the rapid development of the smartphone market, future cars seem to have more connections with intelligent cell phone and Internet. Intelligent transportation system (ITS and telematics system have become research focus in recent years. There is an increasing demand for remote monitoring and diagnostic system as the further research of hybrid electric vehicle (HEV goes on. In this paper, a remote controller area network bus (CAN-Bus data monitor and diagnostic system for HEV is presented using on board diagnostic version-II (OBD-II and Android-based smartphone. It is low-cost, convenient, and extensible with smartphone used in the system to realize communication with ELM327 and remote monitoring center wirelessly. The prototype of client and server is developed in Java language, and it is proved by the test that the system works stably and the collected data have practical values.

  14. 无人机着陆技术研究%Research on Unmanned Aerial Vehicle (UAV) Landing Technique

    Institute of Scientific and Technical Information of China (English)

    郭耀江

    2013-01-01

      无人机着陆引导在现代无人机中的作用越来越重要。本文介绍了国内外无人机的回收方式,分析了多种着陆引导技术的优缺点,在此基础上,对于未来无人机着陆引导技术进行了展望。%  The landing Guidance Technique of Unmanned Aerial Vehicle (UAV) has played more and more important role in modern UAV. This paper introduces the recovery modes of UAV at home and abroad, analyzes the advantages and disadvantages of a variety of landing guidance techniques. In addition, it can serve as the reference for the UAV landing guidance of the future.

  15. Research on Gear Shifting Process without Disengaging Clutch for a Parallel Hybrid Electric Vehicle Equipped with AMT

    Directory of Open Access Journals (Sweden)

    Hui-Long Yu

    2014-01-01

    Full Text Available Dynamic models of a single-shaft parallel hybrid electric vehicle (HEV equipped with automated mechanical transmission (AMT were described in different working stages during a gear shifting process without disengaging clutch. Parameters affecting the gear shifting time, components life, and gear shifting jerk in different transient states during a gear shifting process were deeply analyzed. The mathematical models considering the detailed synchronizer working process which can explain the gear shifting failure, long time gear shifting, and frequent synchronizer failure phenomenon in HEV were derived. Dynamic coordinated control strategy of the engine, motor, and actuators in different transient states considering the detailed working stages of synchronizer in a gear shifting process of a HEV is for the first time innovatively proposed according to the state of art references. Bench test and real road test results show that the proposed control strategy can improve the gear shifting quality in all its evaluation indexes significantly.

  16. Research, development and demonstration of nickel-zinc batteries for electric vehicle propulsion. Annual report, 1979. [70 W/lb

    Energy Technology Data Exchange (ETDEWEB)

    1980-06-01

    This second annual report under Contract No. 31-109-39-4200 covers the period July 1, 1978 through August 31, 1979. The program demonstrates the feasibility of the nickel-zinc battery for electric vehicle propulsion. The program is divided into seven distinct but highly interactive tasks collectively aimed at the development and commercialization of nickel-zinc technology. These basic technical tasks are separator development, electrode development, product design and analysis, cell/module battery testing, process development, pilot manufacturing, and thermal management. A Quality Assurance Program has also been established. Significant progress has been made in the understanding of separator failure mechanisms, and a generic category of materials has been specified for the 300+ deep discharge (100% DOD) applications. Shape change has been reduced significantly. A methodology has been generated with the resulting hierarchy: cycle life cost, volumetric energy density, peak power at 80% DOD, gravimetric energy density, and sustained power. Generation I design full-sized 400-Ah cells have yielded in excess of 70 W/lb at 80% DOD. Extensive testing of cells, modules, and batteries is done in a minicomputer-based testing facility. The best life attained with electric vehicle-size cell components is 315 cycles at 100% DOD (1.0V cutoff voltage), while four-cell (approx. 6V) module performance has been limited to about 145 deep discharge cycles. The scale-up of processes for production of components and cells has progressed to facilitate component production rates of thousands per month. Progress in the area of thermal management has been significant, with the development of a model that accurately represents heat generation and rejection rates during battery operation. For the balance of the program, cycle life of > 500 has to be demonstrated in modules and full-sized batteries. 40 figures, 19 tables. (RWR)

  17. Research, development, and demonstration of lead-acid batteries for electric-vehicle propulsion. Annual report, 1980

    Energy Technology Data Exchange (ETDEWEB)

    1981-03-01

    The first development effort in improving lead-acid batteries fore electric vehicles was the improvement of electric vehicle batteries using flat pasted positive plates and the second was for a tubular long life positive plate. The investigation of 32 component variables based on a flat pasted positive plate configuration is described. The experiment tested 96 - six volt batteries for characterization at 0, 25, and 40/sup 0/C and for cycle life capability at the 3 hour discharge rate with a one cycle, to 80% DOD, per day regime. Four positive paste formulations were selected. Two commercially available microporous separators were used in conjunction with a layer of 0.076 mm thick glass mat. Two concentrations of battery grade sulfuric acid were included in the test to determine if an increase in concentration would improve the battery capacity sufficient to offset the added weight of the more concentrated solution. Two construction variations, 23 plate elements with outside negative plates and 23 plate elements with outside positive plates, were included. The second development effort was an experiment designed to study the relationship of 32 component variables based on a tubular positive plate configuration. 96-six volt batteries were tested at various discharge rates at 0, 25, and 40/sup 0/C along with cycle life testing at 80% DOD of the 3 hour rate. 75 batteries remain on cycle life testing with 17 batteries having in excess of 365 life cycles. Preliminary conclusions indicate: the tubular positive plate is far more capable of withstanding deep cycles than is the flat pasted plate; as presently designed 40 Whr/kg can not be achieved, since 37.7 Whr/kg was the best tubular data obtained; electrolyte circulation is impaired due to the tight element fit in the container; and a redesign is required to reduce the battery weight which will improve the Whr/kg value. This redesign is complete and new molds have been ordered.

  18. The Research on Full-speed Field Weakening Control Method of Electric Vehicle Interior Permanent Magnet Synchronous Motor

    Directory of Open Access Journals (Sweden)

    Gao Run-Ze

    2017-01-01

    Full Text Available The motor drive system represents a key technology for development of the electrical vehicles, and the permanent magnet synchronous motor becomes the mainstream of the new energy vehicle drive motor for the superior performances in power density, low-speed torque density, efficiency and reliability. The paper studies the field weakening control strategy for the interior permanent magnet synchronous motor (IPMSM and provides a field weakening control strategy for the IPMSM at the full-speed range. By studying the mathematical IPMSM model and the methods of conventional vector control and analyzing the operating conditions of the IPMSM at the full-speed range, the paper divides the operating conditions into constant torque operation region I, constant torque operation region II, constant power field weakening operation region and high-speed field weakening operation region to confirm the control strategy algorithm in each region and the transition conditions between regions and provide the current control strategy that the d-axis current and q-axis current are confirmed by the reference torque and the feedback speed. Modeling of the field weakening control strategies in each region is made through the Matlab/Simulink, and simulation of the operating conditions with a steady-state load and a dynamic load is done to verify that the field weakening control strategy in each region is feasible. A co-simulation is made by combining the Matlab/Simulink-based control model, the RecurDyn-based virtual prototype and the RT-LAB to verify the feasible field weakening control strategy.

  19. Research and Development of the Brake Performance Inspection Device for Parked Vehicles%一种驻车制动性能检验装置的研制

    Institute of Scientific and Technical Information of China (English)

    于浩淼; 徐弢; 高文翔

    2011-01-01

    对机动车辆驻车制动性能进行研究,设计了一种符合国标要求的机动车驻车制动性能检验装置.该装置采用检测仪表与机械牵引装置相结合的方法,将坡道上的驻军制动测量转换为平坦路面驻车制动测量.测试结果表明,采用该装置进行驻车制动性能测试的结果与制动试验台测试基本一致,且装置具有操作简单、安装方便、精确度高等特点,适用于机动车检测站、汽车修理厂、事故车辆检验等场合.%The brake performance of the motor-driven parked vehicles is researched and the inspection device conforms national standard has been designed. By combining the detection instruments and mechanical traction equipment, the parked brake measurement on slope is transformed into parked brake measurement on smooth land. The test results indicate that the inspection result obtained by this device is basically consistent with that from brake test bench. The device features ease operated, installed and high accuracy. It is suitable for inspection stations, and repair shops of the motor-driven vehicles, as well as examination of accident vehicles.

  20. Research on Simulation of Vehicle Reliability Road Test%汽车可靠性道路试验仿真研究

    Institute of Scientific and Technical Information of China (English)

    蔡团结; 郭晓汾; 周炜; 李文亮

    2009-01-01

    The vehicle reliability test was simulated by means of Software VPG, a standard washboard road 3D model based on the road in Proving Ground for Highway and Traffic was set up, and a computer simulation on reliability of a type of car made in China was carried out on the washboard road in accordance with the vehicle reliability test cede. The simulation result coincides well with the real car test result in terms of the acceleration-time course at typical measuring points. The reliability of the car model was preliminary studied as well. The research result is helpful for studying the reliability and durability of vehicles further.%应用Virtual Proving Ground软件进行汽车试验场可靠性道路试验的仿真研究,对交通部公路交通试验场标准搓板路面进行了三维实体建模,按照可靠性试验规范,在标准搓板路上对某国产轿车进行了计算机仿真,并与实车试验典型测点加速度一时间历程数据进行对比,具有很好的相似性;并对车辆模型进行了初步的可靠性分析.研究结果为进一步进行汽车可靠性耐久性研究提供了一定依据.

  1. electric vehicle

    Directory of Open Access Journals (Sweden)

    W. R. Lee

    1999-01-01

    Full Text Available A major problem facing battery-powered electric vehicles is in their batteries: weight and charge capacity. Thus, a battery-powered electric vehicle only has a short driving range. To travel for a longer distance, the batteries are required to be recharged frequently. In this paper, we construct a model for a battery-powered electric vehicle, in which driving strategy is to be obtained such that the total travelling time between two locations is minimized. The problem is formulated as an optimization problem with switching times and speed as decision variables. This is an unconventional optimization problem. However, by using the control parametrization enhancing technique (CPET, it is shown that this unconventional optimization is equivalent to a conventional optimal parameter selection problem. Numerical examples are solved using the proposed method.

  2. Research on the recycling industry development model for typical exterior plastic components of end-of-life passenger vehicle based on the SWOT method.

    Science.gov (United States)

    Zhang, Hongshen; Chen, Ming

    2013-11-01

    In-depth studies on the recycling of typical automotive exterior plastic parts are significant and beneficial for environmental protection, energy conservation, and sustainable development of China. In the current study, several methods were used to analyze the recycling industry model for typical exterior parts of passenger vehicles in China. The strengths, weaknesses, opportunities, and challenges of the current recycling industry for typical exterior parts of passenger vehicles were analyzed comprehensively based on the SWOT method. The internal factor evaluation matrix and external factor evaluation matrix were used to evaluate the internal and external factors of the recycling industry. The recycling industry was found to respond well to all the factors and it was found to face good developing opportunities. Then, the cross-link strategies analysis for the typical exterior parts of the passenger car industry of China was conducted based on the SWOT analysis strategies and established SWOT matrix. Finally, based on the aforementioned research, the recycling industry model led by automobile manufacturers was promoted.

  3. 车辆装备有机涂层表面破损程度研究%Research on Damage Degree of Organic Coating on Vehicle Equipment

    Institute of Scientific and Technical Information of China (English)

    徐安桃; 罗兵; 靳福; 许洪军

    2011-01-01

    According to various situations in the process of active service, the corresponding damage severity of organic coatings was simulated using green organic coatings as object of research, which was widely used in military vehicle. Electrochemical test was carried out in 3.5 % NaCl solution. The features of damage severity were revealed and some related influencing factors were discussed. The purpose was to provide theoretic basis for field test on the damaged coatings of military vehicle equipment.%选用了车辆装备广泛采用的军绿色有机涂层为研究对象,根据实际服役过程中可能出现的不同情况,模拟相应的有机涂层破损程度,在3.5%NaCl溶液中进行了电化学测试,揭示了涂层破损程度的特点,探讨了其影响因素,为车辆装备有机涂层破损的现场检测提供一定的理论依据。

  4. Research on the Vehicle Dynamic Stress Analysis Methods%车体动态应力分析方法研究

    Institute of Scientific and Technical Information of China (English)

    徐曦萌; 王红岩; 王良曦

    2011-01-01

    We take a certain armored vehicle to study the roads of different levels. We introduced and discussed modal stress recovery method. Both methods have been dynamic stress of the vehicle hull when it is driving on two methods used in this paper: inertia relief method and used in the dynamic stress analysis of the vehicle hull, with two kinds of results presented. Through the comparison of the results, we can conclude that when we do research on the vehicle dynamic stress, different methods are applied according to the road excitation. Modal stress recovery method should be used when road excitation frequency is close to the inherent frequency of the structure, while inertia relief method should be used when there is big difference between them.%针对某型装甲车辆车体进行了不同等级路面下车辆行驶时的动态应力分析,讨论了所使用的两种方法:惯性释放法和模态应力恢复法。并将两种方法应用到车体的动态应力分析中,得出了各自的结果。通过两种方法的结果对比,得出在进行车体动态应力分析时,应注意路面激励对车体造成的影响,当激励频率与结构固有频率之间差距较小时,应当采用模态应力恢复法以获得准确的车体动态应力结果;当激励频率与结构周有频率之间差距较大时,在保证计算精度的前提下,可以采用惯性释放方法来提高计算的效率。

  5. Hybrid vehicles

    Energy Technology Data Exchange (ETDEWEB)

    West, J.G.W. [Electrical Machines (United Kingdom)

    1997-07-01

    The reasons for adopting hybrid vehicles result mainly from the lack of adequate range from electric vehicles at an acceptable cost. Hybrids can offer significant improvements in emissions and fuel economy. Series and parallel hybrids are compared. A combination of series and parallel operation would be the ideal. This can be obtained using a planetary gearbox as a power split device allowing a small generator to transfer power to the propulsion motor giving the effect of a CVT. It allows the engine to run at semi-constant speed giving better fuel economy and reduced emissions. Hybrid car developments are described that show the wide range of possible hybrid systems. (author)

  6. Electric-Drive Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Septon, Kendall K [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-11

    Electric-drive vehicles use electricity as their primary fuel or to improve the efficiency of conventional vehicle designs. These vehicles can be divided into three categories: Hybrid electric vehicles (HEVs), Plug-in hybrid electric vehicles (PHEVs), All-electric vehicles (EVs). Together, PHEVs and EVs can also be referred to as plug-in electric vehicles (PEVs).

  7. 基于TESIS DYNAware的车辆巡航虚拟试验研究%Virtual Test Research of Vehicle Driving Based on TESIS DYNAware

    Institute of Scientific and Technical Information of China (English)

    杨新红; 高峰; 王国富; 刘国良; 周福全

    2011-01-01

    In Matlab/Simulink, basing on the real-time vehicle dynamics simulation software TESIS DYNAware, and by using Dspace single board DS1103, hardware control signals are connected to the model vedyna_traffic; Selecting "Standard" version of vehicle dynamics model veDYNA in DYNAware, and changing this model by the veDYNA module embedded in Simulink, a virtual experiment system based on DYNAware is established. The simulation control strategy of the adaptive cruise (AC) is analysed, the control model in a ". Mdl" mode is integrated into the experiment system. In the main working interface of veDYNA, data of the simulated type vehicle are input through the graphical editor of parameter file and ". M" interface of text editor, and the controllable items of simulation control and the user procedures are set respectively. By veDYNA, simulation traffic module and animation tool module playing their role together, the virtual tests of vehicle AC are carried out in the control of hardware signals, the related parameters are traced and their corresponding curves are compared with the curves which are acquired from the simulated type vehicle having AC function in quality. The results show that this method of AC virtual test research is a good research method.%在Matlab/Simulink环境下,基于车辆动力学实时仿真软件TESIS DYNAware,利用dSPACE单板系统DS1103,以建模的形式连接车辆的硬件操纵信号于vedyna_traffic模型中;选用DYNAware中车辆动力学模型veDYNA的“Standard”版本,借助嵌入Simulink的veDYNA模块对此模型进行更改,建立基于DYNAware的虚拟试验系统.对自适应巡航(Adaptivecruise,AC)的仿真控制策略进行分析,通过“.mdl”接口集成控制模型于试验系统中.在veDYNA的主工作界面,由参数文件的图形编辑器,以及文本编辑器的“.m”接口,输入仿真车型的车辆数据,对仿真控制的可控项、用户程序分别进行设置;veDYNA、交通仿真模块和动画工

  8. Wind-tunnel investigation of longitudinal and lateral-directional stability and control characteristics of a 0.237-scale model of a remotely piloted research vehicle with a thick, high-aspect-ratio supercritical wing

    Science.gov (United States)

    Byrdsong, T. A.; Brooks, C. W., Jr.

    1980-01-01

    A 0.237-scale model of a remotely piloted research vehicle equipped with a thick, high-aspect-ratio supercritical wing was tested in the Langley 8-foot transonic tunnel to provide experimental data for a prediction of the static stability and control characteristics of the research vehicle as well as to provide an estimate of vehicle flight characteristics for a computer simulation program used in the planning and execution of specific flight-research mission. Data were obtained at a Reynolds number of 16.5 x 10 to the 6th power per meter for Mach numbers up to 0.92. The results indicate regions of longitudinal instability; however, an adequate margin of longitudinal stability exists at a selected cruise condition. Satisfactory effectiveness of pitch, roll, and yaw control was also demonstrated.

  9. Electric vehicle data acquisition system

    DEFF Research Database (Denmark)

    Svendsen, Mathias; Winther-Jensen, Mads; Pedersen, Anders Bro

    2014-01-01

    A data acquisition system for electric vehicles is presented. The system connects to the On-board Diagnostic port of newer vehicles, and utilizes the in-vehicle sensor network, as well as auxiliary sensors, to gather data. Data is transmitted continuously to a central database for academic...... and industrial applications, e.g. research in electric vehicle driving patterns, vehicle substitutability analysis and fleet management. The platform is based on a embedded computer running Linux, and features a high level of modularity and flexibility. The system operates independently of the make of the car......, by using the On-board Diagnostic port to identify car model and adapt its software accordingly. By utilizing on-board Global Navigation Satellite System, General Packet Radio Service, accelerometer, gyroscope and magnetometer, the system not only provides valuable data for research in the field of electric...

  10. 77 FR 12355 - Enabling a Secure Environment for Vehicle-to-Vehicle and Vehicle-to-Infrastructure Transactions...

    Science.gov (United States)

    2012-02-29

    ... crash avoidance and other applications. Currently a public key infrastructure approach to security... Enabling a Secure Environment for Vehicle-to-Vehicle and Vehicle- to-Infrastructure Transactions Workshop; Notice of Public Meeting AGENCY: Research and Innovative Technology Administration, U.S. Department...

  11. Rail vehicle dynamics

    CERN Document Server

    Knothe, Klaus

    2017-01-01

    This book on the dynamics of rail vehicles is developed from the manuscripts for a class with the same name at TU Berlin. It is directed mainly to master students with pre-knowledge in mathematics and mechanics and engineers that want to learn more. The important phenomena of the running behaviour of rail vehicles are derived and explained. Also recent research results and experience from the operation of rail vehicles are included. One focus is the description of the complex wheel-rail contact phenomena that are essential to understand the concept of running stability and curving. A reader should in the end be able to understand the background of simulation tools that are used by the railway industry and universities today.

  12. Dynamics of aerospace vehicles

    Science.gov (United States)

    Schmidt, David K.

    1991-01-01

    The focus of this research was to address the modeling, including model reduction, of flexible aerospace vehicles, with special emphasis on models used in dynamic analysis and/or guidance and control system design. In the modeling, it is critical that the key aspects of the system being modeled be captured in the model. In this work, therefore, aspects of the vehicle dynamics critical to control design were important. In this regard, fundamental contributions were made in the areas of stability robustness analysis techniques, model reduction techniques, and literal approximations for key dynamic characteristics of flexible vehicles. All these areas are related. In the development of a model, approximations are always involved, so control systems designed using these models must be robust against uncertainties in these models.

  13. Advanced Tracking of Vehicles

    DEFF Research Database (Denmark)

    Jensen, Christian Søndergaard; Li, K.-J.; Pakalnis, Stardas

    2005-01-01

    With the continued advances in wireless communications, geo-location technologies, and consumer electronics, it is becoming possible to accurately track the time-varying location of each vehicle in a population of vehicles. This paper reports on ongoing research that has as it objective to develop...... efficient tracking techniques. More specifically, while almost all commercially available tracking solutions simply offer time-based sampling of positions, this paper's techniques aim to offer a guaranteed tracking accuracy for each vehicle at the lowest possible costs, in terms of network traffic...... and server-side updates. This is achieved by designing, prototyping, and testing novel tracking techniques that exploit knowledge of the road network and past movement. These resulting tracking techniques are to support mobile services that rely on the existence of a central server that continuously tracks...

  14. Dynamics of vehicle-road coupled system

    CERN Document Server

    Yang, Shaopu; Li, Shaohua

    2015-01-01

    Vehicle dynamics and road dynamics are usually considered to be two largely independent subjects. In vehicle dynamics, road surface roughness is generally regarded as random excitation of the vehicle, while in road dynamics, the vehicle is generally regarded as a moving load acting on the pavement. This book suggests a new research concept to integrate the vehicle and the road system with the help of a tire model, and establishes a cross-subject research framework dubbed vehicle-pavement coupled system dynamics. In this context, the dynamics of the vehicle, road and the vehicle-road coupled system are investigated by means of theoretical analysis, numerical simulations and field tests. This book will be a valuable resource for university professors, graduate students and engineers majoring in automotive design, mechanical engineering, highway engineering and other related areas. Shaopu Yang is a professor and deputy president of Shijiazhuang Tiedao University, China; Liqun Chen is a professor at Shanghai Univ...

  15. Research and development of vehicle mounted magnetic resonance imaging system%车载式磁共振成像系统的研制

    Institute of Scientific and Technical Information of China (English)

    刘志超; 杨炯; 王晓枫; 张志强; 刘海峰

    2014-01-01

    目的:研制具有诊断精确、性能稳定以及机动性和环境适应性强的车载式磁共振成像系统设备,保障应急医疗任务的完成。方法:运用相关专业技术,通过磁共振系统及车载系统布局设计,结合具体实际情况,基于开放型永磁核磁设备进行研制。结果:本研究从车载式磁共振成像系统及多方面因素进行设计研发,具有磁通会聚的恒定磁场技术、磁场反馈主动磁场稳定技术以及流线型射频发射技术等多项技术创新,采用多通道采集和多轨迹扫描技术对图像进行处理,利用现代化的信息系统快速成像,保证图像清晰,实现了固定式开放型永磁磁共振系统的功能要求。结论:车载式磁共振成像系统能够显著提高应急现场救治诊断的便捷性与准确性,达到快速、高效处理野外突发事件医疗能力的要求。%Objective:To adapt to the anti-terrorism, disaster relief emergency medical support tasks, we need to develop a device mounted magnetic resonance imaging system for diagnostic accuracy, stable performance, flexibility and adaptability to environment, etc. Methods:Use of relevant expertise, systems and automotive systems by magnetic resonance layout, combined with the actual situation of the specific research based on open type permanent magnetic resonance equipment. Results: The research of design and manufactory on vehicle-mouted magnetic resonance imaging system, for example mobility, stability, safety, operation cost, function configuration and image quality. With a constant magnetic field, magnetic flux convergence, feedback active magnetic field technology and streamlined RF technology and a number of technical innovation, the images were processed using technology channel acquisition and multitask scanning, using fast imaging of modern information system, ensure the image clarity. Using the relevant professional and technical, by magnetic resonance

  16. Research of the launch vehicle design made of composite materials under the aerodynamic, thermal and acoustic loadings

    Directory of Open Access Journals (Sweden)

    Davydovich Denis

    2017-01-01

    Full Text Available The experimental research of the carbon composite material sample of payload fairing half structural element was carried out under different types of loading. Mathematical and physical modeling of the sample loading using aerodynamic flow was conducted. Heat loading was researched by the method of a thermal analysis during which typical heat dots corresponding to the changes in the sample structure were determined. Ultrasonic influence on the sample characteristics was considered. As a result, the value of heat leak to the structure surface while moving in the atmospheric phase of the descent was determined.

  17. The Vehicle Routing Problem with Limited Vehicle Capacities

    Directory of Open Access Journals (Sweden)

    Fernando Taracena Sanz

    2013-09-01

    Full Text Available The vehicle routing problem (VRP has been an important research topic during the last decades because of his vital role in the productive systems efficiency. Most of the work done in this area has been directed to solve large scale problems which may not apply for small companies which are a very important engine of the world economy. This paper approaches the problem when limited vehicle resources are present and road transportation is used. This study assumes variable customer orders. Variable volume and weight vehicle capacities are considered and the proposed algorithm develops the vehicle delivery routes and the set of customer orders to deliver per vehicle minimizing a cost objective function. In sampling small company’s logistics costs, big cost savings are found when using the proposed method.

  18. 除冰车铲冰装置传送带的分析与研究%Analysis and Research of Deicing Special Vehicle Shovel Ice Device Conveyor

    Institute of Scientific and Technical Information of China (English)

    张志富; 黄其柏; 陈定方; 王晓娟

    2015-01-01

    In view of the phenomenon that icy roads to road traffic accidents have severely affected,a mechanical deicing special vehicle for road deicing,which carried on the reasonable design and layout is devised.The belt drive system of mechanical deicing device is major researched,infinitesimal dynamics equation of conveyor belt is established,and the belt drive system is analyzed in theory.Through theory design and engineering design algorithm,the belt transmission torque and power is analyzed,the foundation for the further study of belt transmission is laid.By using the ANSYS and ADAMS,the stress simulation and dynamics simulation of belt drive systems are carried out,and the correctness of the preliminary design of pulley drive system is validated,the technical support of the optimum design of deicing special vehicle is provided.The study of deicing special vehicle deicing efficiency has played a key role,which with better economic benefits and promotional value.%针对路面结冰对道路交通安全事故存在严重影响的现象,设计出了一款用于道路除冰的机械式除冰专用车,对其进行合理的设计与布局;主要研究机械铲冰装置的带传动系统,建立传送带的微元动力学方程,对带传动系统进行了理论分析;通过理论设计和工程设计算法对带传动的转矩和功率进行分析,为带传动进一步的研究奠定了基础;通过ANSYS和ADAMS对带传动系统分别进行应力仿真和动力学仿真,验证了初步设计的带轮传动系统的正确性,为除冰车的优化设计提供了技术支撑,对除冰车除冰效率的研究起到了关键的作用,具有较好的经济效益和推广价值.

  19. Research of brain-computer interface automatic vehicle system based on SSVEP%基于SSVEP的脑-机接口自动车系统研究

    Institute of Scientific and Technical Information of China (English)

    赵丽; 孙永; 马彦臻; 何洋

    2011-01-01

    This paper mainly carried out proposes the research of SSVEP brain-computer interface automatic vehicle control systems,which describes the principles of the visual evoked potentials that used in brain-computer interface,and the single-chip is used to designs visual stimulation. Base on the LABVIEW platform, it also uses Hilbert Huang Transform to extract evoked potential vector continuously,which produces brain-computer interface control signals that can be applied to automatic vehicle control system to control the car around before and after exercise. According to a lot of experiments to verify,this sistem can send out the control commands that the correct rate is higher than 83% and can also send a command less than 5 seconds compared with the average time based on SSVEP,so it proves that the system is feasible and has a high application value.%阐述了视觉诱发电位用于脑-机接口的原理,系统采用单片机设计视觉刺激器,同时在LABVIEW平台上,利用希尔伯特黄变换实时提取诱发电位向量,产生脑机接口控制信号,并用于自动车控制系统,从而控制小车的前后左右运动.通过大量实验验证,设计的基于稳态视觉诱发电位的脑-机接口自动车控制系统,发送控制命令正确率高于83%,发送一个命令的平均时间低于5 s,证明该系统的方案是可行的,具有较高的应用价值.

  20. CFD Research on Underwater Vehicle Hydrodynamic Damping Force Coefficient%水下航行体流体阻尼力系数的CFD计算研究

    Institute of Scientific and Technical Information of China (English)

    尤天庆; 王占莹; 程少华; 穆洲; 鲍文春

    2016-01-01

    Underwater vehicle hydrodynamic damping force is crucial to trajectory stability and maneuverability, especially for the vehicle with high angle velocity, thus the accurate prediction of hydrodynamic damping force is important. Based on the CFD method, Reynolds averaged N-S equations based hydrodynamic damping force calculation research is conducted. Combining with dynamic mesh and rotating reference frames, Pitch Damping Force coefficient calculation methods are introduced. Compared with experiment result, the validity and accuracy is proofed. Furthermore, the effect of cavitation is discussed.%水下航行体流体阻尼力关系到弹道的稳定性和操纵性,当航行体以较大角速度机动时阻尼力更是不可忽略,因此准确预示航行体流体阻尼力具有重要意义.以计算流体动力学(Computational Fluid Dynamic,CFD)方法为基础,结合动网格和动坐标系技术,进行基于雷诺平均 N-S 方程的阻尼力计算方法研究,发展针对水下航行体附加力系数和俯仰阻尼力矩系数的数值计算方法,通过与试验数据对比表明,该方法具有较好精度,在此基础上分析了空化现象对流体阻尼力系数的影响.

  1. 物流配送车辆调度问题算法综述%Research on Algorithm of Delivery Vehicle Routing Problems

    Institute of Scientific and Technical Information of China (English)

    陈君兰; 叶春明

    2012-01-01

    Delivery vehicle routing problems (VRP) is a kind of optimization problems, aiming at solving the vehicle routing problems in delivery section. And they have been a focus of research in logistics control optimization recently. After summarize different kinds of VRP, the article gives the relevant general models. The character and the application of genetic algorithm, simulated annealing, tabu search, ant colony algorithm, particle swarm optimization are analyzed and the current possibilities to solve VRP are also discussed. Finally, the development of VRP solution is presented, and point out that improved combined algorithm as well as new algorithm will be important measures to solve VRP.%配送车辆调度优化问题旨在解决配送中路径和车辆调度问题的一类组合优化问题,是近年来物流控制优化领域的研究热点。文章对运输调度问题进行了分类总结,给出总体模型的概括描述,分析遗传算法、模拟退火算法、禁忌搜索算法、蚁群算法和微粒群算法的特点及其在求解配送车辆调度优化问题中的求解思路,并讨论了其求解现状,对未来研究方向进行展望,指出改进混合现有算法,开拓新算法将是更有效解决配送车辆调度问题的好方法。

  2. Predictive Battery Management System for Commercial Hybrid Vehicles: Cooperative Research and Development Final Report, CRADA Number CRD-13-520

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Kandler [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2016-08-01

    NREL and Eaton Corporation will perform work together on DOE Advanced Research Projects Agency-Energy (ARPA-E) 'Advanced Management and Protection of Energy Storage Devices' program (DE-FOA0000675). NREL will experimentally characterize aging behavior of Eaton cells and packs. Eaton and NREL will implement NREL's prognostic life model in Eaton HEV supervisory controllers and demonstrate the algorithms in accelerated life hardware-in-the loop testing conducted at NREL.

  3. Dropsonde System for Unmanned Aerial Vehicles Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Unmanned Aerial Vehicles (UAVs) are assuming more numerous and increasingly important roles in global environmental and atmospheric research. There is a...

  4. Propane Vehicle Demonstration Grant Program

    Energy Technology Data Exchange (ETDEWEB)

    Jack Mallinger

    2004-08-27

    Project Description: Propane Vehicle Demonstration Grants The Propane Vehicle Demonstration Grants was established to demonstrate the benefits of new propane equipment. The US Department of Energy, the Propane Education & Research Council (PERC) and the Propane Vehicle Council (PVC) partnered in this program. The project impacted ten different states, 179 vehicles, and 15 new propane fueling facilities. Based on estimates provided, this project generated a minimum of 1,441,000 new gallons of propane sold for the vehicle market annually. Additionally, two new off-road engines were brought to the market. Projects originally funded under this project were the City of Portland, Colorado, Kansas City, Impco Technologies, Jasper Engines, Maricopa County, New Jersey State, Port of Houston, Salt Lake City Newspaper, Suburban Propane, Mutual Liquid Propane and Ted Johnson.

  5. Flight-Determined Subsonic Longitudinal Stability and Control Derivatives of the F-18 High Angle of Attack Research Vehicle (HARV) with Thrust Vectoring

    Science.gov (United States)

    Iliff, Kenneth W.; Wang, Kon-Sheng Charles

    1997-01-01

    The subsonic longitudinal stability and control derivatives of the F-18 High Angle of Attack Research Vehicle (HARV) are extracted from dynamic flight data using a maximum likelihood parameter identification technique. The technique uses the linearized aircraft equations of motion in their continuous/discrete form and accounts for state and measurement noise as well as thrust-vectoring effects. State noise is used to model the uncommanded forcing function caused by unsteady aerodynamics over the aircraft, particularly at high angles of attack. Thrust vectoring was implemented using electrohydraulically-actuated nozzle postexit vanes and a specialized research flight control system. During maneuvers, a control system feature provided independent aerodynamic control surface inputs and independent thrust-vectoring vane inputs, thereby eliminating correlations between the aircraft states and controls. Substantial variations in control excitation and dynamic response were exhibited for maneuvers conducted at different angles of attack. Opposing vane interactions caused most thrust-vectoring inputs to experience some exhaust plume interference and thus reduced effectiveness. The estimated stability and control derivatives are plotted, and a discussion relates them to predicted values and maneuver quality.

  6. Industrial Vehicle Routing

    OpenAIRE

    Hasle, Geir

    2008-01-01

    Solving the Vehicle Routing Problem (VRP) is a key to efficiency in transportation and supply chain management. The VRP is a computationally hard problem that comes in many guises. The VRP literature contains thousands of papers, and VRP research is regarded as one of the great successes of OR. An industry of routing tool vendors has emerged. Exact optimization methods of today cannot consistently solve VRP instances with more than 50-100 customers in reasonable time, which is generally a sma...

  7. Software architecture of biomimetic underwater vehicle

    Science.gov (United States)

    Praczyk, Tomasz; Szymak, Piotr

    2016-05-01

    Autonomous underwater vehicles are vehicles that are entirely or partly independent of human decisions. In order to obtain operational independence, the vehicles have to be equipped with a specialized software. The main task of the software is to move the vehicle along a trajectory with collision avoidance. Moreover, the software has also to manage different devices installed on the vehicle board, e.g. to start and stop cameras, sonars etc. In addition to the software embedded on the vehicle board, the software responsible for managing the vehicle by the operator is also necessary. Its task is to define mission of the vehicle, to start, to stop the mission, to send emergency commands, to monitor vehicle parameters, and to control the vehicle in remotely operated mode. An important objective of the software is also to support development and tests of other software components. To this end, a simulation environment is necessary, i.e. simulation model of the vehicle and all its key devices, the model of the sea environment, and the software to visualize behavior of the vehicle. The paper presents architecture of the software designed for biomimetic autonomous underwater vehicle (BAUV) that is being constructed within the framework of the scientific project financed by Polish National Center of Research and Development.

  8. Auditory perception of motor vehicle travel paths.

    Science.gov (United States)

    Ashmead, Daniel H; Grantham, D Wesley; Maloff, Erin S; Hornsby, Benjamin; Nakamura, Takabun; Davis, Timothy J; Pampel, Faith; Rushing, Erin G

    2012-06-01

    These experiments address concerns that motor vehicles in electric engine mode are so quiet that they pose a risk to pedestrians, especially those with visual impairments. The "quiet car" issue has focused on hybrid and electric vehicles, although it also applies to internal combustion engine vehicles. Previous research has focused on detectability of vehicles, mostly in quiet settings. Instead, we focused on the functional ability to perceive vehicle motion paths. Participants judged whether simulated vehicles were traveling straight or turning, with emphasis on the impact of background traffic sound. In quiet, listeners made the straight-or-turn judgment soon enough in the vehicle's path to be useful for deciding whether to start crossing the street. This judgment is based largely on sound level cues rather than the spatial direction of the vehicle. With even moderate background traffic sound, the ability to tell straight from turn paths is severely compromised. The signal-to-noise ratio needed for the straight-or-turn judgment is much higher than that needed to detect a vehicle. Although a requirement for a minimum vehicle sound level might enhance detection of vehicles in quiet settings, it is unlikely that this requirement would contribute to pedestrian awareness of vehicle movements in typical traffic settings with many vehicles present. The findings are relevant to deliberations by government agencies and automobile manufacturers about standards for minimum automobile sounds and, more generally, for solutions to pedestrians' needs for information about traffic, especially for pedestrians with sensory impairments.

  9. Hybrid Turbine Electric Vehicle

    Science.gov (United States)

    Viterna, Larry A.

    1997-01-01

    Hybrid electric power trains may revolutionize today's ground passenger vehicles by significantly improving fuel economy and decreasing emissions. The NASA Lewis Research Center is working with industry, universities, and Government to develop and demonstrate a hybrid electric vehicle. Our partners include Bowling Green State University, the Cleveland Regional Transit Authority, Lincoln Electric Motor Division, the State of Ohio's Department of Development, and Teledyne Ryan Aeronautical. The vehicle will be a heavy class urban transit bus offering double the fuel economy of today's buses and emissions that are reduced to 1/10th of the Environmental Protection Agency's standards. At the heart of the vehicle's drive train is a natural-gas-fueled engine. Initially, a small automotive engine will be tested as a baseline. This will be followed by the introduction of an advanced gas turbine developed from an aircraft jet engine. The engine turns a high-speed generator, producing electricity. Power from both the generator and an onboard energy storage system is then provided to a variable-speed electric motor attached to the rear drive axle. An intelligent power-control system determines the most efficient operation of the engine and energy storage system.

  10. Measures for increasing passive safety in commercial vehicles: findings from European Research Programs = Massnahmen zur Steigerung der passiven Sicherheit von Nutzfahrzeugen: Erkenntnisse aus europäischen Forschungsprogrammen

    NARCIS (Netherlands)

    Coo, P.J.A. de; Langwieder, K.; Gwehenberger, J.

    2003-01-01

    The ever increasing ties between European countries on the basis of a common market have long made passive safety in commercial vehicles a Europe-wide issue. Important, harmonized technical stipulations for commercial vehicles are in force within the European Union in the form of EEC directives, and

  11. Measures for increasing passive safety in commercial vehicles: findings from European Research Programs = Massnahmen zur Steigerung der passiven Sicherheit von Nutzfahrzeugen: Erkenntnisse aus europäischen Forschungsprogrammen

    NARCIS (Netherlands)

    Coo, P.J.A. de; Langwieder, K.; Gwehenberger, J.

    2002-01-01

    The ever increasing ties between European countries on the basis of a common market have long made passive safety in commercial vehicles a Europe-wide issue. Important, harmonized technical stipulations for commercial vehicles are in force within the European Union in the form of EEC directives, and

  12. 基于RFID的车辆自动化智能管理系统研究%Research of vehicle automatic management system based on RFID

    Institute of Scientific and Technical Information of China (English)

    张丽然; 沈胜利

    2012-01-01

    In order to solve the current residential parking problem,the residential vehicle automatic management system is designed based on ETC technology. With the analysis of the actual demand, the system includes three parts: vehicle out and in management, vehicle positioning management and vehicle parking management. The vehicle out and in management system could identify and confirm the vehicles going into the community automatically; vehicle positioning management system is responsible for tracking and positioning the vehicle in the community; vehicle parking management system would assign and unlock the parking space for the vehicle automatically. After practices, it proves that the system has good performance and practical value.%基于解决当前小区停车难问题的目的,采用ETC电子不停车收费相关技术,设计了小区车辆自动化管理系统;通过对实际需求的分析,所设计的系统主要包括3个部分:车辆出入管理、定位管理以及停车管理。其中,车辆出入管理系统对进入的车辆进行身份的自动识别和确认;车辆定位管理系统负责对在小区申行驶的车辆进行追踪定位;车辆停车管理系统则为进入的车辆自动分配车住和开启车位锁。经过实践的证明,本系统性能良好,具有较好的实用价值。

  13. 基于小波变换的车辆牌照定位研究%Research of vehicle license plate location based on wavelet transform

    Institute of Scientific and Technical Information of China (English)

    卢衍伟; 张金敏; 王思明

    2012-01-01

    Vehicle license plate precise location takes an important part of vehicle license plate recognition in intelligent transpor tation system (ITS). An approach of vehicle license plate centroid location based on wavelet transform is advanced to solve the vehicle license plate location problem of complex background and light influence. Firstly, vehicle license plate feature is extracted after wavelet analysis's plate image with mathematical morphology, then connect region's centroid method is adopted to locate the vehicle license plate with after characteristics extraction's vehicle license plate image, finally the vehicle license plate is gotten. The experiment indicates that the approach is a feasible vehicle license plate location method to locate the vehicle license plate precisely and quickly.%车辆牌照的准确定位是智能交通中车辆牌照识别技术的关键,提出一种基于小波变换的车牌质心定位方法,该方法可以很好地解决复杂背景与光照下的车牌定位.经过小波分析的车牌图像利用数学形态学进行车牌特征提取,对特征提取后的车牌图像采用连通区域质心的方法对车牌进行定位,最终得到车牌的准确区域.实验结果表明,该方法能够实现车牌的快速准确定位,是一种有效的车牌定位方法.

  14. 汽车检测与维修技术专业实践教学的改革与创新研究%Vehicle Inspection and Maintenance Technology Practice Teaching Reform and Innovation Research

    Institute of Scientific and Technical Information of China (English)

    韩亮

    2013-01-01

    The response of the Ministry of Education issues on deepening the reform of vocational education's call for vehicle inspection and maintenance of technical expertise practice teaching system reform, research vehicle inspection maintenance practice teaching innovation project design and teaching methods, Aimed at improving the technical vehicle inspection and maintenance of professional practice teaching quality.%本课题响应国家教育部关于深化职业教育改革的号召,针对汽车检测与维修技术专业实践教学体系改革,研究汽车检测维修实践教学的项目设计及教学方法创新,旨在提高汽车检测与维修技术专业实践教学质量。

  15. Longitudinal and lateral static stability and control characteristics of a 1/6-scale model of a remotely piloted research vehicle with a supercritical wing

    Science.gov (United States)

    Byrdsong, T. A.; Hallissy, J. B.

    1979-01-01

    An investigation was conducted in the Langley 8-foot transonic pressure tunnel to determine the longitudinal and lateral-directional static stability and control characteristics of a 1/6-scale force model of a remotely piloted research vehicle. The model was equipped with a supercritical wing and employed elevons for pitch and roll control. Test conditions were as follows: Reynolds number of about 6.6 x 10 to the 6th power per meter, variations of sideslip from -6 deg to 6 deg, elevon deflection angle (symmetrically and asymmetrically) from -9 deg to 3 deg, and rudder deflection angle from 0 deg to -10 deg. The model was longitudinally statically stable at angles of attack up to about 7 deg, which is significantly greater than the angle of attack for the cruise condition (approximately 4 deg). In the range of test Mach numbers, the model was directionally stable and had positive effective dihedral, sufficient pitch control, and positive effectiveness of roll and yaw control.

  16. 太阳能电动车碳纤维车身模具研制%Research on the mould for carbon fiber body of solar electric vehicle

    Institute of Scientific and Technical Information of China (English)

    孙志文; 魏利平; 刘可佳; 张宇

    2013-01-01

      The smallest energy loss can be achieved by using the carbon fiber to reduce the weight of the solar energy car. The development idea, manufacturing process and method of the 1/5 carbon fiber body of a solar electric vehicle were presented. The research provid⁃ed the technical basis for manufacturing carbon fiber full-size solar car and the feasibility was verified.%  阐述了将碳纤维应用于制作太阳能电动车车身可以大幅度减轻车身质量,从而降低能源损耗。详细介绍了设计制作1/5碳纤维车身模具的研制思路、制作过程以及已获得的经验和方法,从而为太阳能电动车碳纤维整车的研制提供了技术基础,并验证了全碳纤维车身的可行性。

  17. Hybrid vehicle characteristics and problems facing the development of research%混合动力汽车特点及发展面临问题研究

    Institute of Scientific and Technical Information of China (English)

    田宝春

    2013-01-01

    文章总结了各种类型电动汽车的优缺点,阐述了混合动力汽车三种类型的结构特点和工作原理,并分析了混合动力电动汽车发展所面临的问题。%Article summarizes the advantages and disadvantages of various types of electric vehicles, hybrid vehicles described three types of structural characteristics and working principle, and analyzes the hybrid electric vehicle develop-ment problems faced.

  18. Vehicle routing problem in investment fund allocation

    Science.gov (United States)

    Mamat, Nur Jumaadzan Zaleha; Jaaman, Saiful Hafizah; Ahmad, Rokiah Rozita; Mohd, Ismail

    2013-04-01

    Since its introduction by Dantzig and Ramser in 1959, vehicle routing problem keeps evolving in theories, applications and variability. The evolution in computing and technology are also important contributors to research in solving vehicle routing problem. The main sectors of interests among researchers and practitioners for vehicle routing problem are transportation, distribution and logistics. However, literature found that concept and benefits of vehicle routing problem are not taken advantages of by researchers in the field of investment. Other methods found used in investment include multi-objective programming, linear programming, goal programming and integer programming. Yet the application of vehicle routing problem is not fully explored. A proposal on a framework of the fund allocation optimization using vehicle routing problem is presented here. Preliminary results using FTSE Bursa Malaysia data testing the framework are also given.

  19. Preliminary Assessment of Overweight Mainline Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Siekmann, Adam [ORNL; Capps, Gary J [ORNL; Lascurain, Mary Beth [ORNL

    2011-11-01

    The Federal Motor Carrier Safety Administration requested information regarding overweight and oversized vehicle traffic entering inspection stations (ISs) in order to develop strategies for future research efforts and possibly help guide regulatory issues involving overweight commercial motor vehicles (CMVs). For a period of one month, inspection stations in Knox County and Greene County, Tennessee, recorded overweight and oversized vehicles that entered these ISs. During this period, 435 CMVs were recorded using an electronic form filled out by enforcement personnel at the IS. Of the 435 CMVs recorded, 381 had weight information documented with them. The majority (52.2%) of the vehicles recorded were five-axle combination vehicles, and 50.6% of all the vehicles were permitted to operate above the legal weight limit in Tennessee, which is 80,000 lb for vehicles with five or more axles. Only 16.8% of the CMVs recorded were overweight gross (11.5% of permitted vehicles) and 54.1% were overweight on an axle group. The low percentage of overweight gross CMVs was because only 45 of the vehicles over 80,000 lb. were not permitted. On average, axles that were overweight were 2,000 lb. over the legal limit for an axle or group of axles. Of the vehicles recorded, 172 vehicles were given a North American Standard (NAS) inspection during the assessment. Of those, 69% of the inspections were driver-only inspections (Level III) and only 25% of the inspections had a vehicle component (such as a Level I or Level II). The remaining 6% of inspections did not have valid Aspen numbers; the type of was inspection unknown. Data collected on the types of trailers of each vehicle showed that about half of the recorded CMVs could realistically be given a Level I (full vehicle and driver) inspection; this estimate was solely based on trailer type. Enforcement personnel at ISs without an inspection pit have difficulty fully inspecting certain vehicles due to low clearance below the trailer

  20. Research on Vehicle Information Simulation and Test System%车载信息仿真与测试系统研究

    Institute of Scientific and Technical Information of China (English)

    任崇广; 史恒亮; 白光一; 高德民

    2012-01-01

    传统的串行开发模式制约车载信息系统的开发.为此,通过对车载设备和车载操作系统进行仿真,获取设备通信履历,实现一种基于消息的车载信息仿真与测试系统.该系统通过实时获取车载设备的运行信息,对车载没备的运行情况进行监控.仿真实验结果证明,该系统可有效降低开发的错误率,实现车载信息系统的并行开发和测试.%The traditional serial development mode restricts vehicle information system development progress. To solve this problem, this paper presents a simulation of the vehicle equipment and operating system, real-time access to device communication curriculum vitae, to achieve the parallel development of vehicle information system. Though real-time access to running information of the vehicle equipment, and monitoring the operation of vehicle equipment, the system can effectively reduce the development of the error rate. Simulation results show that the system can effectively achieve the vehicle information system of parallel development and test.

  1. Study on Reverse Reconstruction Method of Vehicle Group Situation in Urban Road Network Based on Driver-Vehicle Feature Evolution

    Directory of Open Access Journals (Sweden)

    Xiaoyuan Wang

    2017-01-01

    Full Text Available Vehicle group situation is the status and situation of dynamic permutation which is composed of target vehicle and neighboring traffic entities. It is a concept which is frequently involved in the research of traffic flow theory, especially the active vehicle security. Studying vehicle group situation in depth is of great significance for traffic safety. Three-lane condition was taken as an example; the characteristics of target vehicle and its neighboring vehicles were synthetically considered to restructure the vehicle group situation in this paper. The Gamma distribution theory was used to identify the vehicle group situation when target vehicle arrived at the end of the study area. From the perspective of driver-vehicle feature evolution, the reverse reconstruction method of vehicle group situation in the urban road network was proposed. Results of actual driving, virtual driving, and simulation experiments showed that the model established in this paper was reasonable and feasible.

  2. Vehicle Development Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Supports the development of prototype deployment platform vehicles for offboard countermeasure systems.DESCRIPTION: The Vehicle Development Laboratory is...

  3. Vehicle Development Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Supports the development of prototype deployment platform vehicles for offboard countermeasure systems. DESCRIPTION: The Vehicle Development Laboratory is...

  4. Advanced hybrid and electric vehicles system optimization and vehicle integration

    CERN Document Server

    2016-01-01

    This contributed volume contains the results of the research program “Agreement for Hybrid and Electric Vehicles”, funded by the International Energy Agency. The topical focus lies on technology options for the system optimization of hybrid and electric vehicle components and drive train configurations which enhance the energy efficiency of the vehicle. The approach to the topic is genuinely interdisciplinary, covering insights from fields. The target audience primarily comprises researchers and industry experts in the field of automotive engineering, but the book may also be beneficial for graduate students.

  5. 汽车驾驶模拟器运动仿真系统的研究%Research on Motion System of Vehicle Driving Simulator

    Institute of Scientific and Technical Information of China (English)

    王泰魁; 段建民

    2011-01-01

    运动系统是汽车驾驶模拟器的主要部分,针对汽车驾驶模拟器运动系统进行分析并研究六自由度平台的控制算法一体感算法;尽管传统的经典体感算法有简单快速的优点,但是并不能真实全面地模拟汽车全工况驾驶,故采用自适应体感算法,对其进行分析并进行仿真;通过人体评价模型,对算法仿真结果进行评价和比较;仿真结果表明,自适应算法与经典算法相比,输出更平稳且精确,具有更好的逼真度,能模拟汽车全工况运动.%Motion system is the main part of the vehicle driving simulator. The control algorithm of 6 -DOF platform, called propriocep-tive algorithm, which is the important part of the motion system is researched in this paper. Although the traditional classic proprioceptive algorithm has the advantages of simple and fast, but can not fully simulate the full working condition of car driving. Therefore, the adaptive proprioceptive algorithm is analyzed and simulated. Through the human evaluation model, simulation results are evaluated and compared. Simulation results show that the algorithm is better than the classical algorithm in the accuracy and stability of its output, which can simulate the full working condition of car sports, and it improves the simulator' s fidelity.

  6. Control of Multiple Robotic Sentry Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Feddema, J.; Klarer, P.; Lewis, C.

    1999-04-01

    As part of a project for the Defense Advanced Research Projects Agency, Sandia National Laboratories is developing and testing the feasibility of using of a cooperative team of robotic sentry vehicles to guard a perimeter and to perform surround and diversion tasks. This paper describes on-going activities in the development of these robotic sentry vehicles. To date, we have developed a robotic perimeter detection system which consists of eight ''Roving All Terrain Lunar Explorer Rover'' (RATLER{trademark}) vehicles, a laptop-based base-station, and several Miniature Intrusion Detection Sensors (MIDS). A radio frequency receiver on each of the RATLER vehicles alerts the sentry vehicles of alarms from the hidden MIDS. When an alarm is received, each vehicle decides whether it should investigate the alarm based on the proximity of itself and the other vehicles to the alarm. As one vehicle attends an alarm, the other vehicles adjust their position around the perimeter to better prepare for another alarm. We have also demonstrated the ability to drive multiple vehicles in formation via tele-operation or by waypoint GPS navigation. This is currently being extended to include mission planning capabilities. At the base-station, the operator can draw on an aerial map the goal regions to be surrounded and the repulsive regions to be avoided. A potential field path planner automatically generates a path from the vehicles' current position to the goal regions while avoiding the repulsive regions and the other vehicles. This path is previewed to the operator before the regions are downloaded to the vehicles. The same potential field path planner resides on the vehicle, except additional repulsive forces from on-board proximity sensors guide the vehicle away from unplanned obstacles.

  7. Research and Analysis on Multi-sensor Data Fusion Algorithm Based on Intelligent Vehicle%基于智能车辆的多传感器数据融合算法研究与分析综述

    Institute of Scientific and Technical Information of China (English)

    宋维堂; 张鸰

    2012-01-01

    Multi-sensor data fusion is a new technology which developed in 1980s. It can be used to synthesize the intelligent vehicle data that collected by multiple sensors,and take advantage of redundancy and complementary between the multi-sensor data to arrive an accurate environmental information for ground vehicle location,vehicle tracking, vehicle navigation etc. Based on classification and summary of existing data fusion methods, this paper elaborates the research on multi-sensor data fusion algorithm and the application of data fusion technology. This paper could provide reference for research of multi-sensor data fusion on intelligent vehicles.%多传感器数据融合是20世纪80年代发展起来的一门新技术,将智能车辆中多个传感器采集的数据进行合成,并充分利用多感器数据间的冗余和互补特性,从而得出准确的环境信息用于地面车辆定位、车辆跟踪、车辆导航等。文章通过对现有的数据融合方法进行分类和归纳总结,对多传感器数据融合算法的研究和数据融合技术的应用情况进行阐述,为智能车辆多传感数据融合方面的研究提供参考。

  8. Research on communication of city cooperative vehicle infrastructure system and it's positioning technology%城市车路协同系统的通信及定位技术研究

    Institute of Scientific and Technical Information of China (English)

    彭登; 徐建闽; 林培群

    2011-01-01

    为了改善道路安全和提高交通效率,提出一种实现车-车、车-路之间无线通信和车路智能协同控制的方法.结合车路协同系统(cooperative vehicle infrastructure system,CVIS)的研究方法,介绍了基于无线传感器网络(wireless sensor network,WSN)技术的车路协同系统和车辆定位装置的整体设计,包括基于ARM920T(advanced RISC machines)内核的嵌入式车栽终端和路测终端的设计,全球定位系统(global positioning system,GPS)接收机的设计,以及设计一个中值滤波器和卡尔曼滤波器的组合来提高GPS接收机的精度.实验结果表明,优化后的GPS接收机定位位置误差明显减少,具有很高的精度和运行效率.%To improve road safety and traffic efficiency, a method is presented, which is used to realize intelligent cooperative vehicle infrastructure control and wireless communication between vehicle and vehicle, vehicle and road. CVIS (cooperative vehicle infrastructure system) research methods are combined. The overall design of CVlS based on WSN (wireless sensor network) technology and vehicle positioning device are introduced. Including the design of an embedded vehicle terminal and an embedded field test terminal based on ARM920T (Advanced RiSC Machines), the designs of GPS (global positioning system) receiver as well as a combination of a median filter and Kalman filter to improve the accuracy of GPS receivers. The experimental results show that the position error of optimized GPS positioning receiver significantly reduced, and the system has high accuracy and operating efficiency.

  9. 基于单目视觉的纵向车间距检测研究%Research on Detection of Longitudinal Vehicle Spacing Based on Monocular Vision

    Institute of Scientific and Technical Information of China (English)

    杨炜; 魏朗; 巩建强; 张倩

    2012-01-01

    提出了一种在结构化公路上基于单目视觉的纵向车间距的检测方法;利用Hough变换识别两侧车道标识线,确定前方车辆识别区域,检测并跟踪本车道内的前方车辆,在传统的静态单帧图像测距模型的基础上,建立了一种改进的静态单帧图像测距模型,并实现了纵向车间距的测量;实验结果表明,该方法能够实时识别跟踪前方车辆,准确检测纵向车间距,其测量值与真实测量值相比较,误差比较小,测量精度较为准确,完全能够满足实际测距要求,是一种非常有效的纵向车间距检测方法,具有较强的通用性.%A new detection method of longitudinal vehicle spacing based on monocular vision is proposed. Using Hough transform recognition on both sides of driveway logo lane, determine leading vehicle identification area, detection and tracking the front vehicle in the lane, on the basis of traditional static single frame image ranging model, establishing a modified static single frame image ranging model ?finished the detection of longitudinal vehicle spacing. The experimental results show that this method could real-time identification leading vehicle, accurately detection of longitudinal vehicle spacing, the measured value compared with the real value measurement, the error are small, measurement accuracy is more accurate, could meet the practical needs, is a kind of effective longitudinal vehicle spacing detection method, has strong generality.

  10. Research on natural gas vehicle filing station planning method%天然气汽车加气站规划方法研究

    Institute of Scientific and Technical Information of China (English)

    贾文磊; 张增刚; 田贯三; 王国磊

    2011-01-01

    Natural gas vehicle filling station planning is an important part of gas special planning. The natural gas vehicle filling station planning with broad prospects, coordination and a certain depth is helpful to the development of natural gas vehicles and the construction of city gas business. The paper analyzes the status and existing problems of natural gas vehicle filling stations, discusses several technical problems of natural gas vehicle filling station planning in gas special planning, explores the planning method and layout principle of the natural gas vehicle filling station, and gives some correlative advice on natural gas vehicle filling station planning.%天然气汽车加气站规划是燃气专项规划的重要组成部分,具有前瞻性、协调性和一定深度的天然气汽车加气站规划有利于天然气汽车事业的发展和城镇燃气事业的建设.分析了天然气汽车加气站的发展现状及存在问题,探讨了城市燃气专项规划中天然气汽车加气站规划中的几个技术问题;结合实例,研究了天然气汽车加气站规划的编制方法以及天然气汽车加气站选址布局的原则,并给出了天然气汽车加气站规划的相关建议.

  11. Vision-based Vehicle Detection Survey

    Directory of Open Access Journals (Sweden)

    Alex David S

    2016-03-01

    Full Text Available Nowadays thousands of drivers and passengers were losing their lives every year on road accident, due to deadly crashes between more than one vehicle. There are number of many research focuses were dedicated to the development of intellectual driver assistance systems and autonomous vehicles over the past decade, which reduces the danger by monitoring the on-road environment. In particular, researchers attracted towards the on-road detection of vehicles in recent years. Different parameters have been analyzed in this paper which includes camera placement and the various applications of monocular vehicle detection, common features and common classification methods, motion- based approaches and nighttime vehicle detection and monocular pose estimation. Previous works on the vehicle detection listed based on camera poisons, feature based detection and motion based detection works and night time detection.

  12. 基于DCT域的车标定位方法研究%Research on Vehicle Logo Localization Method Based on DCT Domain

    Institute of Scientific and Technical Information of China (English)

    潘艺; 李玉恵; 杨敏; 李全武

    2016-01-01

    为了能够对高速公路视频中的违法车辆特征进行提取,需要完成车辆对象的目标检测和特征区域定位工作。在特征区域定位研究中,车标定位是很重要的工作,文中研究了一种直接在车脸图像DCT域中进行车标定位的方法。该方法首先使用Adaboost算法对高速公路视频中的车辆对象进行车脸区域的定位,得到感兴趣的车脸区域图像,然后利用车脸图像中车标纹理和散热器隔栏纹理所具有的不同方向性特点,直接在DCT域中提取车标的横向、竖向、斜向纹理的方向信息,通过区别于散热器隔栏只有横、竖向纹理的特性,采用阈值方法把车标区域从车脸图像背景中分割出来,从而定位到车标区域。实验采用大量不同车标的车辆图片进行处理,结果表明,该算法处理速度较快,且可以有效实现车脸区域的车标定位。%In order to extract illegal vehicles’ feature in highway video,the target detection of vehicle objects and the localization of char-acteristics areas need to be completed. In the work of characteristics areas localization,vehicle logo localization is a very important work. A new approach is proposed for vehicle logo localization directly in DCT domain of face image. Firstly adaptive boosting ( Adaboost) al-gorithm is used to locate the vehicle face region of vehicle objects and the vehicle face images could be gained. Secondly the vehicle lo-go’ s horizontal,vertical,and diagonal texture information in the DCT domain are extracted by the different directional characteristics be-tween vehicle logo’ s and radiator grille’ s texture in vehicle face images,then threshold method is used to divide the vehicle logo region out of the background image which could rule out the radiator grille’ s horizontal,vertical texture information. A large number of vehicle images with different logos are used for experiments,and the results show that the

  13. The Vehicle Routing Problem with Split Demand and Its Research Progress%需求可拆分的车辆路径问题及其研究进展

    Institute of Scientific and Technical Information of China (English)

    李军; 张建勇; 张博

    2016-01-01

    Vehicle scheduling is the key of the transportation optimization, vehicle routing problem with split demand is an important branch, is more in line with the actual situation of vehicle delivery, and can better meet the actual needs of the enterprise management. This paper briefly introduces the vehicle routing problem with split demand, and then makes a detailed analysis of the domestic and foreign research progress.%车辆调度是运输环节优化的关键所在,可拆分车辆路径问题作为车辆路径问题的一个重要分支,具有更切合车辆配送的实际情况,更能满足企业经营管理的实际需求.本文首先对需求可拆分的车辆路径问题进行了简要介绍,然后对其国内外研究进展进行了详细分析.

  14. 微纳卫星专用发射运载器发展趋势研究%Research on the Trends of Developing Dedicated Launch Vehicle for Micro/Nano Satellite

    Institute of Scientific and Technical Information of China (English)

    战培国

    2013-01-01

    微纳卫星低成本、快速专用发射运载器是近些年来航天运输领域人们研究关注的问题之一。本文在简要介绍国外微纳卫星发展现状及趋势的基础上,分析微纳卫星发射运载器市场及供求关系,研究专用发射运载器研发及概念技术发展趋势,探讨专用发射运载器在民用和军事领域的发展前景。%The low-cost/responsive dedicated launch vehicle for micro/nano satellite is one of the problem in the area of aerospace transportation. This paper introduces development states and trends of micro/nano satelite , analyzes the supply and demand of the dedicated launch vehicle market, researches the development, concept and technology of the dedicated launch vehicle, discusses the trends of the dedicated launch vehicle in civil and military area.

  15. Electric and Hybrid Electric Vehicle Technologies

    Science.gov (United States)

    2007-11-02

    electric vehicles .10 In 1994, BART chose the bid submitted by U.S. Electricar to provide 45 converted Geo Prisms and to be the turnkey operator. However...Declining to Sign Contracts Rank (1 = highest) => 1 2 3 4 Cost too much per month (10) 6 2 1 1 Want to buy , not lease, an electric vehicle (4) 2 1...District DEFENSE ADVANCED RESEARCH PROJECTS AGENCY ELECTRIC AND HYBRID ELECTRIC VEHICLE TECHNOLOGIES COOPERATIVE AGREEMENT MDA972-93-1-0027 QUARTERLY

  16. Research on Precision Survey of Unmanned Aerial Vehicle Remote Sensing in Validation Field%无人机遥感载荷验证场精密测量研究

    Institute of Scientific and Technical Information of China (English)

    徐锐; 吴恒友; 赵天鹏

    2012-01-01

    Research on precision survey of unmanned aerial vehicle remote sensing in validation field provides basic survey data for establishing China first aerial remote sensing scale - field and the world first unmanned aerial vehicle remote sensing scale - field. The process of precision survey is introduced in this paper and the results of this research are shown too. This research provides reference for precision survey of unmanned aerial vehicle remote sensing in the future.%无人机遥感载荷验证场精密测量研究,为我国首个航空遥感定标场的建立、世界上首个无人机遥感定标场的建立提供了基础测绘数据保障.本文详细介绍了无人机遥感载荷验证场(南方场)精密测量的具体实施过程,以及本项目的主要成果.为今后无人机遥感验证工作提供借鉴.

  17. Electric vehicle batteries reports of the PPP European green vehicles initiative

    CERN Document Server

    Briec, Emma

    2014-01-01

    This edited volume presents research results of the PPP European Green Vehicle Initiative (EGVI), focusing on electric vehicle batteries. Electrification is one road towards sustainable road transportation, and battery technology is one of the key enabling technologies. However, at the same time, battery technology is one of the main obstacles for a broad commercial launch of electric vehicles. This book includes research contributions which try to bridge the gap between research and innovation in the field of battery technology for electric vehicles. The target audience primarily comprises r

  18. 基于车辆牌照图像的识别技术研究%Research on Image Recognition Technology Based on Vehicle License Plate

    Institute of Scientific and Technical Information of China (English)

    石昊苏

    2015-01-01

    This paper,the whole process of vehicle license plate image recognition is discussed in four aspects:preprocessing,vehicle license plate location,character segmentation and character recognition.Through the analysis of the part of the algorithm,the problem of image quality is solved effectively,and the related problems of batch and automatic vehicle license plate recognition are identiifed.%文章讨论了车辆牌照图像识别整个过程的四个环节:预处理、车辆牌照定位、字符分割、字符识别。通过优化改进Canny算法有效地解决了图像质量不足,批量、自动识别车辆牌照的相关问题。

  19. The Research and Application of GPS Monitoring System in Vehicle Management%车辆管理中GPS监控系统的应用研究

    Institute of Scientific and Technical Information of China (English)

    赵立军

    2015-01-01

    GPS监控系统又称为全球定位系统,对于车辆管理具有重大作用和意义.GPS监控系统在车辆管理中应用,首先要提高系统的运行稳定性和可靠性等性能.同时要采取措施,推广GPS监控系统在车管中的普及应用.%GPS monitoring system is also called the global positioning system,which has important function and meaning to vehicle management.In the application of GPS monitoring system in vehicle management,above all,the stability and reliability of the system should be improved.Meanwhile,measures should be taken to promote the wide application of GPS monitoring system in vehicle management.

  20. 需求可拆分的开放式车辆路径问题研究%Research on Split Delivery Open Vehicle Routing Problem

    Institute of Scientific and Technical Information of China (English)

    李三彬; 柴玉梅; 王黎明

    2011-01-01

    The traditional Open Vehicle Routing Problem(OVRP) assumes that the demand of the clients can not be split and the type of vehicles is the same, but in the practical logistics distribution, the type of vehicles is not exactly the same, sometimes the transportation cost can be reduced by splitting the demand of clients to make the best of the loading capacity of vehicles.This paper proposes the Split Delivery Open Vehicle Routing Problem with Heterogeneous Vehicles(SDOVRPHV), presents mathematic model of the integer programming of the problem, solves it with Tabu search algorithm and improves the generation of the initial solution and neighborhood structure in the algorithm.By experiments, the validity of the model is validated, and the results are compared with the traditional OVRP which indicates that the algorithm can reduce effectively the transportation cost.%传统的开放式车辆路径问题假设客户的需求不可拆分、车辆类型相同,但在实际的物流配送中,车辆类型不完全相同,对需求的拆分能充分利用车辆的装载能力,降低运输成本.为此,提出需求可拆分的不同种车辆的开放式车辆路径问题,给出整数规划的数学模型,利用禁忌搜索算法对该问题求解,改进算法中初始解和邻域结构的产生过程.通过实验验证模型的有效性,并将结果与传统的开放式车辆路径问题进行比较,表明该算法可有效减少运输成本.

  1. Simulation Research on Dynamic Performances of Railway Vehicles Based on SIMPACK%基于SIMPACK的轨道车辆动态性能仿真分析

    Institute of Scientific and Technical Information of China (English)

    黄安宁; 易智民; 张安全

    2013-01-01

    The whole dynamic modeling of a type of railway vehicle is modeled using the multi -body dynamics software SIMPACK. The linear and nonlinear critical speed of the railway vehicle is obtained by simulating different speeds through the linear track, whereas the curve passing ability of the railway vehicle is obtained by using different speeds through the different curved railway tracks. The stability index of the railway vehicle is analyzed under different speeds. The finite element modal of the vehicle is obtained with the finite element analysis software ANSYS, which is inputted into SIMPACK to model the multi - body system (MBS) dynamic model with rigid and flexible coupling. The dynamic performance of a type of railway vehicles can be thus obtained by solving this model.%利用多体动力学软件SIMPACK对某型轨道车辆进行整体建模;采用不同速度通过直线轨道线路而获得车辆的线性和非线性临界速度;使轨道车辆通过不同的曲线线路而获得其曲线通过能力;分析了轨道车辆在不同速度下的平稳性指标;采用有限元分析软件ANSYS获得车体的有限元模态文件,输入SIMPACK中获得刚柔耦合的多体动力学模型,并获得车体刚柔耦合的动态性能.

  2. Research on Indoor Position System for Autonomous Micro-vehicle%缩微智能车室内定位系统研究

    Institute of Scientific and Technical Information of China (English)

    玄建永; 王京春; 陆耿; 江永亨; 毕建权

    2014-01-01

    为在缩微交通环境下模拟实现现实交通中GPS对车辆的定位以及辅助驾驶功能,文中利用RFID以及网络通信技术建立了缩微智能车的室内定位系统,并在此基础上运用卡尔曼滤波算法对缩微智能车进行机动目标跟踪,实现了缩微车在缩微交通环境下的实时定位显示。大量实验结果表明,该室内定位系统能够可靠显示智能车的当前位置,定位误差小于0.07 m,满足缩微交通环境下缩微车的定位需求。%In order to provide the function of vehicle position and driving assistance in micro traffic environment as that of GPS for primal size vehicle,an indoor position system is built for autonomous micro-vehicle using RFID and network communication technology. In the system,Kalman filter is introduced to track and position the target and micro-vehicle can be shown in real-time. Experiment results show that the system can track the position of micro-vehicle with an error smaller than 0. 07 m in real time,which meets the position demands of micro-vehicle in micro traffic environment.

  3. 农用车的绿色维修与科学管理探究%Research on Green Maintenance and Scientific Management of Agricultural Vehicles

    Institute of Scientific and Technical Information of China (English)

    姚淑娴

    2014-01-01

    Many problems exist in maintenance and management of farm vehicles. The article mainly begins from the current situation of green maintenance and modern agricultural management, and actively explores green maintenance and scientific management countermeasures of agricultural vehicles.%目前农用车在维修和管理方面仍存在很多问题,文章主要从农用车的绿色维修和现代管理现状出发,积极探讨农用车的绿色维修与科学管理对策。

  4. Heavy Duty Vehicle Futures Analysis.

    Energy Technology Data Exchange (ETDEWEB)

    Askin, Amanda Christine; Barter, Garrett.; West, Todd H.; Manley, Dawn Kataoka

    2014-05-01

    This report describes work performed for an Early Career Research and Development project. This project developed a heavy-duty vehicle (HDV) sector model to assess the factors influencing alternative fuel and efficiency technology adoption. This model builds on a Sandia light duty vehicle sector model and provides a platform for assessing potential impacts of technological advancements developed at the Combustion Research Facility. Alternative fuel and technology adoption modeling is typically developed around a small set of scenarios. This HDV sector model segments the HDV sector and parameterizes input values, such as fuel prices, efficiencies, and vehicle costs. This parameterization enables sensitivity and trade space analyses to identify the inputs that are most associated with outputs of interest, such as diesel consumption and greenhouse gas emissions. Thus this analysis tool enables identification of the most significant HDV sector drivers that can be used to support energy security and climate change goals.

  5. Simulation Research on Braking Performance of Tracked Vehicle Hydraulic Energy Storage Braking System%履带车辆液压储能式制动系统制动性能仿真研究

    Institute of Scientific and Technical Information of China (English)

    赵广俊; 吕建刚; 宋彬; 滕飞

    2011-01-01

    为了实现对履带车辆制动能量的回收利用,针对某型履带车辆建立其液压储能式制动系统,分析系统工作模式;在AMESim下建立液压储能式制动系统及车辆模型,在Matlab/Simulink下建立控制系统模型;提出基于踏板行程逻辑门限值的模糊控制策略;在驾驶员不同的制动意图和系统负荷能力条件下,对履带车辆的制动工况进行联合仿真研究.结果表明,在该控制策略下液压储能式制动系统实现了对履带车辆的稳定制动和对制动能量的有效回收.%In order to achieve the tracked vehicle braking energy recovery and utilization, a certain type of tracked vehicle hydraulic energy storage braking system was established, and the working mode was analyzed. The model of hydraulic energy storage braking system and the vehicle was established in AMESim, and the control system model was established in Matlab/Simulink. Fuzzy logic control strategy based on pedal opening threshold was proposed. Under the driver's different braking intention and conditions of system load capacity, the tracked vehicle's braking process was researched under co-simulation. The results show that with the control strategy in the hydraulic energy storage braking system, the stable braking of tracked vehicle and the effective recovery of braking energy were achieved.

  6. Different Control Algorithms for a Platoon of Autonomous Vehicles

    Directory of Open Access Journals (Sweden)

    Zoran Gacovski

    2014-05-01

    Full Text Available This paper presents a concept of platoon movement of autonomous vehicles (smart cars. These vehicles have Adaptive or Advanced cruise control (ACC system also called Intelligent cruise control (ICC or Adaptive Intelligent cruise control (AICC system. The vehicles are suitable to follow other vehicles on desired distance and to be organized in platoons. To perform a research on the control and stability of an AGV (Automated Guided Vehicles string, we have developed a car-following model. To do this, first a single vehicle is modeled and since all cars in the platoon have the same dynamics, the single vehicle model is copied ten times to form model of platoon (string with ten vehicles. To control this string, we have applied equal PID controllers to all vehicles, except the leading vehicle. These controllers try to keep the headway distance as constant as possible and the velocity error between subsequent vehicles - small. For control of vehicle with nonlinear dynamics combi­nation of feedforward control and feedback control approach is used. Feedforward control is based on the inverse model of nominal dynamics of the vehicle, and feedback PID control is designed based on the linearized model of the vehicle. For simulation and analysis of vehicle and platoon of vehicles – we have developed Matlab/Simulink models. Simulation results, discussions and conclusions are given at the end of the paper.

  7. Ride Dynamics of a Tracked Vehicle with a Finite Element Vehicle Model

    Directory of Open Access Journals (Sweden)

    S. Jothi

    2016-01-01

    Full Text Available Research on tracked vehicle dynamics is by and large limited to multi-rigid body simulation. For realistic prediction of vehicle dynamics, it is better to model the vehicle as multi-flexible body. In this paper, tracked vehicle is modelled as a mass-spring system with sprung and unsprung masses of the physical tracked vehicle by Finite element method. Using the equivalent vehicle model, dynamic studies are carried out by imparting vertical displacement inputs to the road wheels. Ride characteristics of the vehicle are captured by modelling the road wheel arms as flexible elements using Finite element method. In this work, a typical tracked vehicle test terrain viz., Trapezoidal blocks terrain (APG terrain is considered. Through the simulations, the effect of the road wheel arm flexibility is monitored. Result of the analysis of equivalent vehicle model with flexible road wheel arms, is compared with the equivalent vehicle model with rigid road wheel arms and also with the experimental results of physical tracked vehicle. Though there is no major difference in the vertical bounce response between the flexible model and the rigid model, but there is a visible difference in the roll condition. Result of the flexible vehicle model is also reasonably matches with the experimental result.Defence Science Journal, Vol. 66, No. 1, January 2016, pp. 19-25, DOI: http://dx.doi.org/10.14429/dsj.66.9201

  8. The Research of Personality Characteristics of Motor Vehicle Drivers%机动车驾驶员人格特征研究

    Institute of Scientific and Technical Information of China (English)

    孟祥红; 连珂

    2004-01-01

    Using Cattell 16 PF personality test, the authors test the personality of 600 motor vehicle drivers of Handan City, reach the conclusion that there is a significant difference of 8 personality characteristics between drivers of accident group and those of safe group.

  9. 军事配送式后勤车辆路径问题研究%Research on Military Distribution Logistics Vehicle Routing

    Institute of Scientific and Technical Information of China (English)

    郝瑞卿; 闫莉

    2015-01-01

    In order to improve the distribution efficiency of military logistics vehicles and realize the quick response ,a multi-objective dynamic military logistics vehicle routing model with a single time window was established based on the analysis of the characteristics of military logistics vehicle routing . And then a Genetic Ant Colony Hybrid Algorithm of two stages was designed for the model . The simulation results show that the hybrid algorithm overcomes the lower efficiency of the genetic algorithm and the premature convergence of the Ant colony algorithm .It can effectively optimize the dynamic routing of the military logistics distribution vehicles .%为提高军事后勤车辆的配送效率,实现快速响应,文中在分析军事后勤车辆路径问题特点的基础上,建立了单时间窗多目标动态军事后勤车辆路径模型,设计了遗传-蚁群混合算法对模型进行两阶段求解。仿真实验结果表明,该算法解决了遗传算法求解效率低及蚁群算法收敛过早的问题,可有效解决军事后勤车辆动态路径优化问题。

  10. Research of electronic lock of electric vehicle interface%电动汽车充电接口的电子锁的研究

    Institute of Scientific and Technical Information of China (English)

    周红斌

    2012-01-01

    充电接口的电子锁是电动汽车推广的前提条件之一,电子锁是电动汽车充电的安全性保证。本文介绍了国外充电接口电子锁的发展和现状,结合中国电网行业和电动汽车行业的实际情况,本文分别对国内车辆端、桩端的电子锁的应用和技术细节做了简要描述。%The electronic lock of electric vehicle interface is the premise condition of promotion.The electronic lock is safety guarantee of electric vehicle charging。This paper introduces the development of foreign charging interface and the present situation。After study the state grid industry and the actual situation of the electric car industry respectively,the application and technical detail of different electric locks of electric vehicle side and electric vehicle side are s also briefly described。

  11. International Conference on Vehicle and Automotive Engineering

    CERN Document Server

    Bolló, Betti

    2017-01-01

    This book presents the proceedings of the first vehicle engineering and vehicle industry conference. It captures the outcome of theoretical and practical studies as well as the future development trends in a wide field of automotive research. The themes of the conference include design, manufacturing, economic and educational topics.

  12. LNG vehicle technology, economics, and safety assessment

    Science.gov (United States)

    Powars, Charles A.; Moyer, Carl B.; Lowell, Douglas D.

    1994-02-01

    Liquid natural gas (LNG) is an attractive transportation fuel because of its high heating value and energy density (i.e., Btu/lb. and Btu/gal.), clean burning characteristics, relatively low cost ($/Btu), and domestic availability. This research evaluated LNG vehicle and refueling system technology, economics, and safety. Prior and current LNG vehicle projects were studied to identify needed technology improvements. Life-cycle cost analyses considered various LNG vehicle and fuel supply options. Safety records, standards, and analysis methods were reviewed. The LNG market niche is centrally fueled heavy-duty fleet vehicles with high fuel consumption. For these applications, fuel cost savings can amortize equipment capital costs.

  13. Environmental assessment of lightweight electric vehicles

    CERN Document Server

    Egede, Patricia

    2017-01-01

    This monograph adresses the challenge of the environmental assessment of leightweight electric vehicles. It poses the question whether the use of lightweight materials in electric vehicles can reduce the vehicles’ environmental impact and compares the environmental performance of a lightweight electric vehicle (LEV) to other types of vehicles. The topical approach focuses on methods from life cycle assessment (LCA), and the book concludes with a comprehensive concept on the environmental assessment of LEVs. The target audience primarily comprises LCA practitioners from research institutes and industry, but it may also be beneficial for graduate students specializing in the field of environmental assessment.

  14. Vibration Isolation for Parallel Hydraulic Hybrid Vehicles

    Directory of Open Access Journals (Sweden)

    The M. Nguyen

    2008-01-01

    Full Text Available In recent decades, several types of hybrid vehicles have been developed in order to improve the fuel economy and to reduce the pollution. Hybrid electric vehicles (HEV have shown a significant improvement in fuel efficiency for small and medium-sized passenger vehicles and SUVs. HEV has several limitations when applied to heavy vehicles; one is that larger vehicles demand more power, which requires significantly larger battery capacities. As an alternative solution, hydraulic hybrid technology has been found effective for heavy duty vehicle because of its high power density. The mechanical batteries used in hydraulic hybrid vehicles (HHV can be charged and discharged remarkably faster than chemical batteries. This feature is essential for heavy vehicle hybridization. One of the main problems that should be solved for the successful commercialization of HHV is the excessive noise and vibration involving with the hydraulic systems. This study focuses on using magnetorheological (MR technology to reduce the noise and vibration transmissibility from the hydraulic system to the vehicle body. In order to study the noise and vibration of HHV, a hydraulic hybrid subsystem in parallel design is analyzed. This research shows that the MR elements play an important role in reducing the transmitted noise and vibration to the vehicle body. Additionally, locations and orientations of the isolation system also affect the efficiency of the noise and vibration mitigation. In simulations, a skyhook control algorithm is used to achieve the highest possible effectiveness of the MR isolation system.

  15. 车辆红外特征控制系统研究%Research on Infrared Signature Control System for Vehicle

    Institute of Scientific and Technical Information of China (English)

    余慧娟; 王丽伟; 刘相新; 韦学中

    2015-01-01

    By reason of the surface high temperature and thermal inertia disparity between the vehicle body and the ground background in the process of maneuvering of military ground vehicle, the infrared signature of vehicle couldn't blend with the ground background, and is easily identified and tracked by infrared imaging reconnaissance equipment and guided weapons. The vehicle infrared signature control technology including infrared signature stealth, infrared signature decoy and infrared signature change to disrupt and damage the infrared imaging detection was presented. The vehicle infrared signature control system based on the phase change temperature control device (PCTCD), low emissivity photonic crystal device (LEPCD), heat exhaust and insulation device (HEID), dynamic electrochromic variable temperature device (DEVTD) and emergency infrared countermeasure device (EICD) was study. The prototype experimental results show that the system application effect is obvious.%地面军事车辆有诸多热源,在行驶过程中,车体与不断变化的地物背景热惯量差异悬殊,使得车辆与地物背景红外特征存在较大差异,易被红外成像侦察设备和制导武器识别和跟踪.文中提出了通过红外特征隐身、特征示假和特征变化来破坏红外成像探测,并研究了基于相变温控装置、低发射率光子晶体装置、热源疏导与隔热装置、动态电致变温装置和应急红外对抗装置组成的车辆红外特征控制系统,经样件试验验证了应用效果明显.

  16. Research on Equivalent Equipment of Launch Vehicle Nozzle Base on FPGA%基于FPGA的运载火箭喷管等效装置研究

    Institute of Scientific and Technical Information of China (English)

    夏阳; 高晓颖; 邹莹

    2011-01-01

    In the hardware - in - the - loop simulation of launch vehicle control system, it is common that the e-quivalent equipment of launch vehicle nozzle is needed to simulate the speciality of nozzle and close the control system. The former equivalent equipment of nozzle couldnot meet the application demand of the simulation system nowadays. This paper firstly transforms the transfer function of the launch vehicle nozzle into the corresponding difference equations. Secondly, the operation process is realized with state machine principle based on the algorithm of floating point numbers with VHDL. Finally, the equivalent equipment of launch vehicle nozzle is realized based on the FPGA and other peripheral circuit. The tests of the equivalent equipment of launch vehicle nozzle indicate that it can simulate completely the speciality of the nozzles with high precision.%在运载火箭控制系统半实物仿真和全实物仿真过程中,通常需要喷管等效装置实现对运载火箭喷管的特性模拟和系统闭合.传统的喷管等效装置已不能满足现今的系统应用需求.从工程实际角度出发,首先将喷管传递函数离散化变换为对应的差分方程,再在VHDL浮点算法的基础上,采用状态机电路原理在FPGA上实现该差分方程的运算过程,最后基于该FPGA构建外围硬件电路,实现了运载火箭喷管等效装置.经测试表明,该喷管等效装置完全能够高精度模拟喷管特性.

  17. Constraint Embedding for Vehicle Suspension Dynamics

    Directory of Open Access Journals (Sweden)

    Jain Abhinandan

    2016-06-01

    Full Text Available The goal of this research is to achieve close to real-time dynamics performance for allowing auto-pilot in-the-loop testing of unmanned ground vehicles (UGV for urban as well as off-road scenarios. The overall vehicle dynamics performance is governed by the multibody dynamics model for the vehicle, the wheel/terrain interaction dynamics and the onboard control system. The topic of this paper is the development of computationally efficient and accurate dynamics model for ground vehicles with complex suspension dynamics. A challenge is that typical vehicle suspensions involve closed-chain loops which require expensive DAE integration techniques. In this paper, we illustrate the use the alternative constraint embedding technique to reduce the cost and improve the accuracy of the dynamics model for the vehicle.

  18. Research on Usability Evaluation Index of Armored Vehicle Computer System%车载计算机系统可用性评价指标体系研究

    Institute of Scientific and Technical Information of China (English)

    陈建明; 王洪艳; 金传洋

    2013-01-01

    针对目前车载计算机系统可用性研究中缺少可用性评估指标体系的问题,进行了深入地分析与研究,首先研究了构建车载计算机系统可用性评估体系的基本原则,分析了可用性评估的主要内容,最后提出了可用性评估的指标体系。研究结果表明:可用性评价一方面能从用户角度反映车载计算机系统存在的问题,为设计者决策提供依据,另一方面也能为供应商改进系统性能提供参考。%This paper conducted in-depth analysis and research of the problem of the lack of armored vehicle computer system usability evaluation index system.This paper firstly studied the basic principles of building the usability evaluation index system of armored vehicle computer system, then analyzed the main contents of usability evaluation, finally it brought forwards the usability evaluation index system of armored vehicle computer system from the effectiveness, efficiency and satisfaction aspects. The research shows that usability evaluation can not only find usability problems of armored vehicle computer system to provide basis for designer, but also improve system to give reference for the seller..

  19. Technology and implementation of electric vehicles and plug‐in hybrid electric vehicles

    DEFF Research Database (Denmark)

    Hansen, Kenneth; Mathiesen, Brian Vad; Connolly, David

    2011-01-01

    developments. Different business models and policies are also outlined along with a description of the on‐going research and demonstration projects. An analysis of the current and near term electric and plug‐in hybrid electric vehicles indicate that the cost for family cars will not change much, while...... the ranges of electric vehicles will increase and may even double for some family cars compared to the existing models. The average driving range in this report increases from around 150 km for existing electric vehicles to more than 200 km for near term electric vehicles (expected new models in 2012......In this report state of the art electric vehicle and plug‐in hybrid electric vehicle technology is presented to clarify the current and near term development. The current status of diffusion for electric vehicles in Denmark, Sweden and internationally is presented as well as the expected...

  20. Technology and implementation of electric vehicles and plug‐in hybrid electric vehicles

    DEFF Research Database (Denmark)

    Hansen, Kenneth; Mathiesen, Brian Vad; Connolly, David

    2011-01-01

    In this report state of the art electric vehicle and plug‐in hybrid electric vehicle technology is presented to clarify the current and near term development. The current status of diffusion for electric vehicles in Denmark, Sweden and internationally is presented as well as the expected...... developments. Different business models and policies are also outlined along with a description of the on‐going research and demonstration projects. An analysis of the current and near term electric and plug‐in hybrid electric vehicles indicate that the cost for family cars will not change much, while...... the ranges of electric vehicles will increase and may even double for some family cars compared to the existing models. The average driving range in this report increases from around 150 km for existing electric vehicles to more than 200 km for near term electric vehicles (expected new models in 2012...

  1. Electric and Hybrid Vehicle Technology: TOPTEC

    Energy Technology Data Exchange (ETDEWEB)

    1992-01-01

    Today, growing awareness of environmental and energy issues associated with the automobile has resulted in renewed interest in the electric vehicle. In recognition of this, the Society of Automotive Engineers has added a TOPTEC on electric vehicles to the series of technical symposia focused on key issues currently facing industry and government. This workshop on the Electric and Hybrid Vehicle provides an opportunity to learn about recent progress in these rapidly changing technologies. Research and development of both the vehicle and battery system has accelerated sharply and in fact, the improved technologies of the powertrain system make the performance of today's electric vehicle quite comparable to the equivalent gasoline vehicle, with the exception of driving range between refueling'' stops. Also, since there is no tailpipe emission, the electric vehicle meets the definition of Zero Emission Vehicle: embodied in recent air quality regulations. The discussion forum will include a review of the advantages and limitations of electric vehicles, where the technologies are today and where they need to be in order to get to production level vehicles, and the service and maintenance requirements once they get to the road. There will be a major focus on the status of battery technologies, the various approaches to recharge of the battery systems and the activities currently underway for developing standards throughout the vehicle and infrastructure system. Intermingled in all of this technology discussion will be a view of the new relationships emerging between the auto industry, the utilities, and government. Since the electric vehicle and its support system will be the most radical change ever introduced into the private vehicle sector of the transportation system, success in the market requires an understanding of the role of all of the partners, as well as the new technologies involved.

  2. Electric and Hybrid Vehicle Technology: TOPTEC

    Energy Technology Data Exchange (ETDEWEB)

    1992-12-01

    Today, growing awareness of environmental and energy issues associated with the automobile has resulted in renewed interest in the electric vehicle. In recognition of this, the Society of Automotive Engineers has added a TOPTEC on electric vehicles to the series of technical symposia focused on key issues currently facing industry and government. This workshop on the Electric and Hybrid Vehicle provides an opportunity to learn about recent progress in these rapidly changing technologies. Research and development of both the vehicle and battery system has accelerated sharply and in fact, the improved technologies of the powertrain system make the performance of today`s electric vehicle quite comparable to the equivalent gasoline vehicle, with the exception of driving range between ``refueling`` stops. Also, since there is no tailpipe emission, the electric vehicle meets the definition of ``Zero Emission Vehicle: embodied in recent air quality regulations. The discussion forum will include a review of the advantages and limitations of electric vehicles, where the technologies are today and where they need to be in order to get to production level vehicles, and the service and maintenance requirements once they get to the road. There will be a major focus on the status of battery technologies, the various approaches to recharge of the battery systems and the activities currently underway for developing standards throughout the vehicle and infrastructure system. Intermingled in all of this technology discussion will be a view of the new relationships emerging between the auto industry, the utilities, and government. Since the electric vehicle and its support system will be the most radical change ever introduced into the private vehicle sector of the transportation system, success in the market requires an understanding of the role of all of the partners, as well as the new technologies involved.

  3. Achievement report on the incoming projects related to ITS. Research and survey involving 'Research and development of universal design vehicle based on ITS technology'; ITS renkei kokei project an. 'ITS gijutsu wo tenkaishita universal design vehicle no kenkyu kaihatsu' ni kakawaru kenkyu chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-02-01

    For the promotion of 'Report on Strategy of Automobile Industrial Technologies - Strategy 2 - Promotion of Development of Vehicle Environment Recognition Technology and Driver's State Detection Technology,' investigations and studies including overseas surveys are conducted over six selected subjects which are (1) ITS (Intelligent Transportation System) and VCSS (Voice Communications Switching System), (2) old people, handicapped people, and universal design, (3) intelligent interface, (4) techniques of assessing bionic data and load of driving, (5) driving simulator and virtual reality, and (6) data communication, mobile data communication in particular. It is then found that, on the assumption that there exists a mobile communications environment such as ITS or Internet aboard the automobile, it is important to develop a universal design automobile which adapts itself to the driver thereby respecting driver's viewpoint and that such is to be accomplished by grasping driver's characteristics especially under extraordinary conditions in the way of Kansei engineering and by redesigning the driver's operating system making use of the active interface technology. A conclusion is reached that development should continue in compliance with the separately specified 6 items which are indispensable for the research and development of an ITS based man-adaptive automobile. (NEDO)

  4. Research on Force Sensing for Digital Steering Wheel of Powered Modular Vehicles%动力模块车组的驾驶真实感研究

    Institute of Scientific and Technical Information of China (English)

    郭为忠; 陈伟; 高峰; 刘仁强; 齐臣坤

    2013-01-01

    To obtain the force sensing during operating steering wheel of large powered modular vehicle, a new steering system with force feedback based on torque control of servo motor was proposed. Based on steering characteristics of common vehicles, a modified force model of single steering tire was built for common vehicles during steering, and then the force model of steering wheel of modular vehicles was built by using the relationship between steering angles of steering wheel and two suspending groups in the same axle. Based on the model, a servo motor driving experimental platform was built to simulate the force sensing on steering wheel of modular vehicles, and also a virtual driving circumstance was constructed to support the experiment. The results show that the steering torque curves are similar to that of common vehicles, satisfying the national standard. The proposed method is verified to be effective.%为了使驾驶人在驾驶大型动力模块车组时获得力反馈真实感,提出基于伺服电机扭矩控制的转向盘力觉真实感系统.基于普通车辆的转向系特性,建立转弯时单个转向轮的转向力修正模型,据此利用动力模块车组同一轴线上2个悬挂转角与转向盘转角的数学关系,建立动力模块车组转向盘转向力模型,在此基础上构建伺服电机驱动的转向盘转向力模拟试验平台和虚拟车辆行驶环境.结果表明:数字转向盘的转向力矩曲线与普通车辆转向力矩特性相近,符合中国标准的规定,验证了所提方法的有效性.

  5. Vehicle to Grid Demonstration Project

    Energy Technology Data Exchange (ETDEWEB)

    Willett Kempton; Meryl Gardner; Michael Hidrue; Fouad Kamilev; Sachin Kamboj; Jon Lilley; Rodney McGee; George Parsons; Nat Pearre; Keith Trnka

    2010-12-31

    This report summarizes the activities and accomplishments of a two-year DOE-funded project on Grid-Integrated Vehicles (GIV) with vehicle to grid power (V2G). The project included several research and development components: an analysis of US driving patterns; an analysis of the market for EVs and V2G-capable EVs; development and testing of GIV components (in-car and in-EVSE); interconnect law and policy; and development and filing of patents. In addition, development activities included GIV manufacturing and licensing of technologies developed under this grant. Also, five vehicles were built and deployed, four for the fleet of the State of Delaware, plus one for the University of Delaware fleet.

  6. Energy Saving Design and Research on Hydraulic System of Aerial Vehicle%高空作业车液压系统节能设计与研究

    Institute of Scientific and Technical Information of China (English)

    顾长明; 贾学军; 吕明亮

    2016-01-01

    Carrier rocket satellite fairing of docking and installation needs to be done using aerial vehicle, continue to work more than 4 hours, energy-saving hydraulic system on aerial vehicle, working hours .etc are put forward higher requirements. Based on aerial vehicle thermal limit under continuous operation and energy saving requirements, adopting a vale controlled load-sensing circuit to achieve energy efficiency goals,it is obtained by theoretical calculation that heating power and the temperature rise of hydraulic system. This paper builds simulation model of aerial vehicle hydraulic system load sensor, balance valve, the basic arm circuit , testing the energy saving effect of hy-draulic system, and verify the correctness of the energy-saving principle of the vale controlled load-sensing circuit.%运载火箭卫星整流罩的对接和安装需要使用高空作业车完成,持续工作时长4h以上,对高空作业车液压系统节能性、工作时长等都提出了较高要求。针对高空作业车持续作业下的发热限制和节能要求,采用了一种阀控负荷传感回路实现液压系统节能目标,建立高空作业车液压系统负荷传感阀、平衡阀、基本臂回路等的仿真模型,并对液压系统节能效果进行试验测试,验证了阀控负荷传感回路节能原理的正确性。

  7. Research on Vehicle Routing Problem Based on Improved Genetic Algorithm%改进遗传算法下的车辆路径问题研究

    Institute of Scientific and Technical Information of China (English)

    陈果

    2016-01-01

    The vehicle routing problem is a typical combinatorial optimization problem.With the continuous improvement of logistics requirements, the basic genetic algorithm has been difficult to meet the needs of customers.The basic genetic algorithm in solving this kind of problem,often appear premature convergence, and delivery time of the vehicle has the defects of limited,can not to solve the optimization of this kind of problem,so this paper uses improved genetic algorithm on vehicle routing problem were studied,and explore the improved genetic algorithm in solving the vehicle routing problem is effective.%车辆路径问题是一种典型的组合优化类问题,随着客户对物流要求的不断提升,基本的遗传算法已经很难满足客户的需求。基本的遗传算法在求解这类问题的时候,经常会出现早熟收敛,以及对车辆的运送时间存在限制等方面的缺陷,不能够对这类问题进行最优化求解,所以本文采用改进的遗传算法就车辆路径问题进行研究,并探究改进下的遗传算法在求解车辆路径问题时的有效性。

  8. 基于Android的车载导航系统的研究与设计%Research and Implementation of Vehicle Navigation System Based on Android

    Institute of Scientific and Technical Information of China (English)

    肖文平; 杨斌

    2012-01-01

    为了缩短嵌入式车载导航系统开发进程,提高系统维护和升级能力,研究了Android平台的特点及车载导航系统的性能需求。建立以Android操作系统、GPS技术为核心的车载导航系统终端软件。此软件对系统平台的实时路径获取、地图匹配算法校正定位模块的误差、地图的显示更新以及采用Dijkstra算法实现最短路径的导航规划都进行了详细的分析。实验结果表明,开发人员基于Android的通用框架编写的车载系统的应用软件,便于在不同平台间移植和升级。%To shorten the development process of embedded vehicle navigation system and improve the ability of system maintence and upgrade,this paper studies characteristics of Android platform and performenee requirements of vehicle navigation system. The vehicle navigation system terminal software is established based on Android operating system and GPS technology. Real-time path acquirement, map - matching algorithm correction location module's error, map's display and upgrade, and the shortest path navigation planning using Dijkstra algorithm are analyzed in detail. Experimental result shows that application software of the vehicle system based on Android commom framework is easy to port and upgrade in different platforms.

  9. GPS Fire Vehicle Monitoring and Management System Design and Research%GPS消防车辆监控管理系统设计研究

    Institute of Scientific and Technical Information of China (English)

    栾涛

    2012-01-01

    首先分析了GPS导航定位技术,然后着重分析了GPS在消防车辆调度中的应用,开发了一套以GPS技术为核心的消防车辆调度监控管理信息系统.该系统管理高效,有效地提高了数字化管理水平,能够合理调度消防车辆,提高企业管理效率,同时节约了开支,实现管理成本和运营成本量化,大大节省运营成本.%This paper first analyzes the CPS navigation and positioning technology, and then focuses on the analysis of GPS in fire fighting vehicle scheduling, develops a set to GPS technology as the core of fire vehicle scheduling and monitoring management information system, the system of efficient management, effectively improve the digital management level, to schedule fire vehicles, improve enterprise management efficiency, at the same lime, save money, to realize the management cost and the operating cost of quantification, greatly saves the operation coat.

  10. Research on Vehicle Routing Problem Based on Improved Genetic Algorithm%基于改进遗传算法的车辆路径问题研究

    Institute of Scientific and Technical Information of China (English)

    朱志勇; 刁洪祥

    2011-01-01

    车辆路径问题是一个典型的组合优化类问题,而传统的算法无法满足顾客需求对物流运输提出的要求.遗传算法是求解此类问题的方法之一,针对遗传算法容易出现早熟收敛,以及车辆运送的时间限制,该文采用改进的遗传算法对有时间窗的车辆路径问题进行分析,实验验证了算法的有效性.%Vehicle routing problem is a typical combinational optimization problem, and the traditional algorithms can not meet customer needs for logistics transport. Genetic algorithm is one of the methods used to solve -VRP,because of premature convergence of genetic algorithm and the time constraints of vehicles transporting, this paper analysis vehicle routing problem with Time Window using an improved genetic algorithm. Experiment data prove the effectiveness of the algorithm.

  11. 北斗智能车载终端的研究与实现%Research and Implementation of Beidou Intelligent Vehicle Terminal

    Institute of Scientific and Technical Information of China (English)

    王古月; 陶庭叶; 张耀允

    2016-01-01

    The intelligent vehicle terminalin intelligent transportation system of the role and significance are studied. Combined with the WIFI module which based on the Socket communication and GSM/GPRS communication technology,the Beidou intelligent ve-hicle terminal of cm-level positioning precision is achieved by using beidou high precision real-time differential positioning technology, the Beidou intelligent vehicle terminal based on mobile GIS platform are realized by using Android developmentplatform.%文章对智能交通系统中智能车载终端的作用与意义进行了研究,利用北斗高精度实时差分定位技术,并结合基于WIFI模块的Socket通信和GSM/GPRS通信技术,实现了厘米级定位精度,同时基于Android开发平台,实现了基于移动GIS平台的北斗智能车载终端。

  12. Research on the Choosing Behavior of Vehicle T ravel%小汽车方式出行选择行为研究

    Institute of Scientific and Technical Information of China (English)

    施杰; 江琪

    2015-01-01

    Taking example of traffic in Shanghai and selecting influence factors such as daily average tr‐avel times and the average travel time distance and so on ,Logit model is established to clarify the in‐fluence degree and the significant level of various factors on the way of vehicle travel choice ,and to have a quantitative analysis of the vehicle travel choice probability under the condition of various fac‐tors .On this basis ,the control variable method is used to draw curves .Elastic analysis and the mar‐ginal rate of substitution reveals the dynamic characteristic of the vehicle travel choice behavior .%以上海市交通为研究对象,选取日均出行次数、平均每次出行时间距离等影响因素,建立Logit模型,理清各因素对小汽车方式出行选择的影响程度与显著水平,定量分析小汽车方式出行在各因素条件下的选择概率。在此基础上,采用控制变量法绘制曲线,由弹性分析与边际替代率揭示小汽车方式出行选择行为的动态特性。

  13. Research on Path Tracking Control of Autonomous Vehicle%无人驾驶车路径跟踪控制研究

    Institute of Scientific and Technical Information of China (English)

    修彩靖; 陈慧

    2012-01-01

    研究被控对象无人驾驶车,基于预瞄控制思想,设计一种无人驾驶车路径跟踪控制器,将控制器分为预瞄控制和补偿控制两部分,预瞄控制模拟驾驶员在驾驶车辆过程中对前方的道路环境信息进行预瞄,根据道路曲率程度决定方向盘转向,补偿控制是对车辆遇到干扰偏离原车道的纠正.仿真实验结果表明,该控制器能够保证无人驾驶车准确跟踪各种参考路径,且具有较好的鲁棒性.%This paper designs path tracking controller based on preview control thought for autonomous vehicle that is non-linear controlled object. Controller includes two parts, preview control and compensation control, preview control previews ahead road by simulation for the process of driving, and generates control signal of steering angle according to the curvature of road, while the compensation control is the amendment for the interference encountered in the vehicle lane deviation from the original correction. Simulation experimental results show that the proposed control algorithm can ensure tracking reference path of autonomous vehicles accurately, and has good robustness.

  14. PASSIVE DETECTION OF VEHICLE LOADING

    Energy Technology Data Exchange (ETDEWEB)

    Garrett, A.

    2012-01-03

    The Digital Imaging and Remote Sensing Laboratory (DIRS) at the Rochester Institute of Technology, along with the Savannah River National Laboratory is investigating passive methods to quantify vehicle loading. The research described in this paper investigates multiple vehicle indicators including brake temperature, tire temperature, engine temperature, acceleration and deceleration rates, engine acoustics, suspension response, tire deformation and vibrational response. Our investigation into these variables includes building and implementing a sensing system for data collection as well as multiple full-scale vehicle tests. The sensing system includes; infrared video cameras, triaxial accelerometers, microphones, video cameras and thermocouples. The full scale testing includes both a medium size dump truck and a tractor-trailer truck on closed courses with loads spanning the full range of the vehicle's capacity. Statistical analysis of the collected data is used to determine the effectiveness of each of the indicators for characterizing the weight of a vehicle. The final sensing system will monitor multiple load indicators and combine the results to achieve a more accurate measurement than any of the indicators could provide alone.

  15. 基于预防性维修的车辆调度优化仿真研究%Research on Optimization of Vehicle Scheduling Simulation Based on Preventive Maintenance

    Institute of Scientific and Technical Information of China (English)

    毕占东; 张磊; 刘义乐; 张建; 王兴野

    2016-01-01

    以装甲车辆调度优化为研究目标,通过分析我军现行预防性维修制度的规律、种类和维修规划,采用离散型建模技术构建了基于预防性维修的装甲车辆调度模型,并结合典型案例应用Anylogic仿真软件对装甲车辆合理调度进行优化研究,为部队装甲车辆使用合理规划提供了参考依据。%The paper aimed at researching the optimization of armored vehicle scheduling. Through analyzing the current law,types and maintenance plan of the preventive maintenance system,the paper used discrete modeling technology to establish an armored vehicle scheduling model based on preventive maintenance. And combined with a typical case,the paper used simulation software named Anylogic to optimize the scheduling of armored vehicles,which provides references for our army to use military equipment more reasonably.

  16. Analysis of Data Planning Research to Support R & D Management Decision of Electric Vehicle%支持电动汽车研发管理决策的数据规划研究浅析

    Institute of Scientific and Technical Information of China (English)

    彭洁; 张新民; 张英杰

    2014-01-01

    Aimed at the information resource planning, we will regard multi-sourced data as the research object to support the development of electric vehicles management decision making. After referencing Zachman framework and enterprise architecture (EA) programming method, there is an analysis of the R&D management business environment of electric vehicle decision support. hTen it raises the electric vehicles decision support business frame and data frame. At last it focus on R&D base of the electric car technology planning, carry out data management for example on how to support the decision framework by integrating different data.%围绕信息资源规划,将为电动汽车研发管理决策提供支持的多源数据作为研究对象,借鉴Zachman框架思路和企业架构(EA)规划方法,分析电动汽车研发管理决策支持的业务环境,提出统一的电动汽车决策支持业务框架和数据框架,最后针对电动汽车技术规划的研发基础环节,对数据框架如何支撑决策活动、开展数据管理进行应用示例。

  17. GPS Attitude Determination for Launch Vehicles Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Toyon Research Corporation proposes to develop a family of compact, low-cost GPS-based attitude (GPS/A) sensors for launch vehicles. In order to obtain 3-D attitude...

  18. Electric-vehicle batteries

    Science.gov (United States)

    Oman, Henry; Gross, Sid

    1995-02-01

    Electric vehicles that can't reach trolley wires need batteries. In the early 1900's electric cars disappeared when owners found that replacing the car's worn-out lead-acid battery costs more than a new gasoline-powered car. Most of today's electric cars are still propelled by lead-acid batteries. General Motors in their prototype Impact, for example, used starting-lighting-ignition batteries, which deliver lots of power for demonstrations, but have a life of less than 100 deep discharges. Now promising alternative technology has challenged the world-wide lead miners, refiners, and battery makers into forming a consortium that sponsors research into making better lead-acid batteries. Horizon's new bipolar battery delivered 50 watt-hours per kg (Wh/kg), compared with 20 for ordinary transport-vehicle batteries. The alternatives are delivering from 80 Wh/kg (nickel-metal hydride) up to 200 Wh/kg (zinc-bromine). A Fiat Panda traveled 260 km on a single charge of its zinc-bromine battery. A German 3.5-ton postal truck traveled 300 km with a single charge in its 650-kg (146 Wh/kg) zinc-air battery. Its top speed was 110 km per hour.

  19. Electric Vehicle Charging Modeling

    OpenAIRE

    Grahn, Pia

    2014-01-01

    With an electrified passenger transportation fleet, carbon dioxide emissions could be reduced significantly depending on the electric power production mix. Increased electric power consumption due to electric vehicle charging demands of electric vehicle fleets may be met by increased amount of renewable power production in the electrical systems. With electric vehicle fleets in the transportation system there is a need for establishing an electric vehicle charging infrastructure that distribu...

  20. Distributed Control in Multi-Vehicle Systems

    Directory of Open Access Journals (Sweden)

    Paul A. Avery

    2013-12-01

    Full Text Available The Southwest Research Institute (SwRI Mobile Autonomous Robotics Technology Initiative (MARTI program has enabled the development of fully-autonomous passenger-sized commercial vehicles and military tactical vehicles, as well as the development of cooperative vehicle behaviors, such as cooperative sensor sharing and cooperative convoy operations. The program has also developed behaviors to interface intelligent vehicles with intelligent road-side devices. The development of intelligent vehicle behaviors cannot be approached as stand-alone phenomena; rather, they must be understood within a context of the broader traffic system dynamics. The study of other complex systems has shown that system-level behaviors emerge as a result of the spatio-temporal dynamics within a system's constituent parts. The design of such systems must therefore account for both the system-level emergent behavior, as well as behaviors of individuals within the system. It has also become clear over the past several years, for both of these domains, that human trust in the behavior of individual vehicles is paramount to broader technology adoption. This paper examines the interplay between individual vehicle capabilities, vehicle connectivity, and emergent system behaviors, and presents some considerations for a distributed control paradigm in a multi-vehicle system.

  1. Distributed Control in Multi-Vehicle Systems

    Directory of Open Access Journals (Sweden)

    Paul A. Avery

    2013-12-01

    Full Text Available The Southwest Research Institute (SwRI Mobile Autonomous Robotics Technology Initiative (MARTI program has enabled the development of fully-autonomous passenger-sized commercial vehicles and military tactical vehicles, as well as the development of cooperative vehicle behaviors, such as cooperative sensor sharing and cooperative convoy operations. The program has also developed behaviors to interface intelligent vehicles with intelligent road-side devices. The development of intelligent vehicle behaviors cannot be approached as stand-alone phenomena; rather, they must be understood within a context of the broader traffic system dynamics. The study of other complex systems has shown that system-level behaviors emerge as a result of the spatio-temporal dynamics within a system's constituent parts. The design of such systems must therefore account for both the system-level emergent behavior, as well as behaviors of individuals within the system. It has also become clear over the past several years, for both of these domains, that human trust in the behavior of individual vehicles is paramount to broader technology adoption. This paper examines the interplay between individual vehicle capabilities, vehicle connectivity, and emergent system behaviors, and presents some considerations for a distributed control paradigm in a multi-vehicle system.

  2. Unmanned vehicle mobility: Limits of autonomous navigation

    Science.gov (United States)

    McCormac, A. W.; Hanna, D. M.; McFee, J.

    Considerable research is being conducted on the development of unmanned vehicles for military and civilian applications, particularly for hostile environments. It is desirable to produce a vehicle which can select its own route, not requiring remote navigation, but then it would be required to sense its surroundings. Although imaging systems and modern computers make this possible, the extreme data processing demands usually make it impractical. It is suggested that an inverse relationship exists between vehicle mobility and the complexity of the autonomous navigation system required for an unmanned vehicle. An overview of vehicle navigation is presented which shows the degree to which navigation is affected by increasing inherent mobility. If the inherent mobility of a vehicle is greatly enhanced, the scene image processing requirements and navigational computations are greatly simplified. This means the vehicle path selection and speed and steering adjustments may be made more quickly, resulting in higher vehicle speeds whenever possible. Combined with reduced deviation from the intended path, this would greatly increase the speed of the vehicle from one given point to another, suggesting that high speed autonomous navigation may be feasible.

  3. RADIOSS整车碰撞模型转换方法及其应用%Research of the RADIOSS Conversion Method Based on Vehicle Crash FE Model and Its Application

    Institute of Scientific and Technical Information of China (English)

    周会锋; 杜汉斌; 王大志; 汤晓东

    2012-01-01

    整车被动安全性研究是汽车研发领域中的重点,工程实际中经常遇到不同软件有限元模型之间的转化问题.根据实际工程的应用情况,详细的介绍了上海汽车某轿车整车碰撞模型从LS-DYNA格式转化为RADIOSS格式的具体应用方法,并最终将使用RADIOSS显式求解器对整车碰撞各工况的仿真分析计算结果与整车试验测试数据进行比较分析.从对比结果可以看出,采用RADIOSS显式求解器得到的整车碰撞仿真结果与试验结果吻合较好,计算精度较高,从而验证了新转化的RADIOSS模型的有效性,并进一步验证了模型的转化方法的可行性和合理性.同时,文中所介绍的模型转换方法和流程,可为各领域类似的模型转换工作提供一定的指导作用,具有重要的工程应用价值.%The research of vehicle crash Worseness is the keystone in vehicle research and development area. In engineering practice, the problem of converting the finite element (FE) model between different softwares in simulation work. In this article, the FE model conversion method from LS-DYNA to RADIOSS was studied and used in detail based on one SAIC (Shanghai Automotive Industry Company) passenger car. And then, the result between the simulation data achieved by RADIOSS solver and the vehicle crash physical test data is compared. From the comparison result , the relative high precision between CAE and physical test is found. It proved that this method which used conversion from LS-DYNA to RADIOSS based on a vehicle structure model is feasible, and this vehicle FE model is quite right. At the same time, this conversion work has high useful value in industry field and engineering application.

  4. Electric Vehicle Technician

    Science.gov (United States)

    Moore, Pam

    2011-01-01

    With President Obama's goal to have one million electric vehicles (EV) on the road by 2015, the electric vehicle technician should have a promising and busy future. "The job force in the car industry is ramping up for a revitalized green car industry," according to Greencareersguide.com. An electric vehicle technician will safely troubleshoot and…

  5. Road-rail vehicle

    NARCIS (Netherlands)

    Evers, J.J.M.

    2002-01-01

    A transport vehicle equipped with a number of first wheel sets, having wheels provided with tires, to which steering means and driving means, if any, are coupled to enable the transport vehicle to be moved over a road surface. The transport vehicle further comprises at least one second wheel set, ha

  6. Electric vehicles: Driving range

    Science.gov (United States)

    Kempton, Willett

    2016-09-01

    For uptake of electric vehicles to increase, consumers' driving-range needs must be fulfilled. Analysis of the driving patterns of personal vehicles in the US now shows that today's electric vehicles can meet all travel needs on almost 90% of days from a single overnight charge.

  7. Vehicle chassis monitoring system

    Energy Technology Data Exchange (ETDEWEB)

    Pisu, P.; Soliman, A.; Rizzoni, G. [Ohio State Univ., Columbus (United States). Center for Automotive Research

    2001-07-01

    Fault detection and isolation is becoming one of the most important aspects in vehicle control system design. In order to achieve this FDI schemes, particular vehicle subsystems integrated with a controller have been proposed. This paper introduces a new model-based fault detection and fault diagnosis method for monitoring the vehicle chassis performance. (orig.)

  8. Electric Vehicle Technician

    Science.gov (United States)

    Moore, Pam

    2011-01-01

    With President Obama's goal to have one million electric vehicles (EV) on the road by 2015, the electric vehicle technician should have a promising and busy future. "The job force in the car industry is ramping up for a revitalized green car industry," according to Greencareersguide.com. An electric vehicle technician will safely troubleshoot and…

  9. Automotive vehicle sensors

    Energy Technology Data Exchange (ETDEWEB)

    Sheen, S.H.; Raptis, A.C.; Moscynski, M.J.

    1995-09-01

    This report is an introduction to the field of automotive vehicle sensors. It contains a prototype data base for companies working in automotive vehicle sensors, as well as a prototype data base for automotive vehicle sensors. A market analysis is also included.

  10. Consumer Views: Fuel Economy, Plug-in Electric Vehicle Battery Range, and Willingness to Pay for Vehicle Technology

    Energy Technology Data Exchange (ETDEWEB)

    Singer, Mark [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2017-05-11

    This presentation includes data captured by the National Renewable Energy Laboratory (NREL) to support the U.S. Department of Energy's Vehicle Technologies Office (VTO) research efforts. The data capture consumer views on fuel economy, plug-in electric vehicle battery range, and willingness to pay for advanced vehicle technologies.

  11. 直线电机大架修车辆段检修主厂房工艺设计研究%Research on Process Planning of Main Maintenance Workshop for Overhaul and Un - wheeling Repair of Linear Motor Vehicle in Metro Vehicle Depot

    Institute of Scientific and Technical Information of China (English)

    李强

    2012-01-01

    Research purposes:The Yuzhu Vehicle Depot of Line 5 of Guangzhou metro is the first metro vehicle depot for the overhaul and un - wheeling repair of linear motor vehicle in China. Its main maintenance workshop undertakes the overhaul and un - wheeling repair works and has the first maintenance operation line for the wheel - set of A, B and L types in China. According to the characteristics of linear motor vehicle, the process planning of the main maintenance workshop has been researched for the maintenance mode, inspection and maintenance system and flexible design of the wheel - set operation line for the linear motorvehicle. The maintenance workshop was designed compositely with a number of innovations and the process layout was reasonable and compact. Such design can provide an important reference to the similar works in future.Research conclusions:The combined capital repair and shed repair system was adopted for the linear motor vehicle. By using this system, the repair cycle extanded 30% compared with the repair system for the common wheel and rail vehicle. The main repair workshop was desired with capital and un - wheeling workshop as main part and the main maintenance workshops were all near the capital and un - wheeling workshop. The flexible design was made for the operation line for the wheel - set maintenance and it could meet the demand of repairing three types of wheel - set.%研究目的:广州地铁五号线鱼珠车辆段是我国第一座直线电机大架修车辆段,检修主厂房既承担直线电机车辆大架修任务,又同时设置国内第1条融合A、B、L三种车型的轮对检修作业线,针对直线电机车辆的特点,检修主厂房工艺设计对直线电机车辆检修模式、检修制度、轮对作业线柔性化设计进行研究,为今后国内直线电机大架修车辆段检修主厂房工艺设计提供了重要的参考标准.研究结论:直线电机车辆检修模式采用大修、段修合修制;检修周期比

  12. Vehicle Routing Algorithms for Local Delivery at Naval Supply Centers.

    Science.gov (United States)

    1981-03-01

    the purpose of selecting a vehicle routing algorithm that can be automated. This investigation led the author to a survey of " vehicle routing problem " (also...the vehicle routing problem model is described and solution techniques are sur- veyed. Additionally, computational experience that operations...researchers have had with these solution techniques is pre- sented. There are several classical and theoretical problems related to the vehicle routing problem . These

  13. Vehicle Testing and Integration Facility; NREL (National Renewable Energy Laboratory)

    Energy Technology Data Exchange (ETDEWEB)

    None

    2015-03-02

    Engineers at the National Renewable Energy Laboratory’s (NREL’s) Vehicle Testing and Integration Facility (VTIF) are developing strategies to address two separate but equally crucial areas of research: meeting the demands of electric vehicle (EV) grid integration and minimizing fuel consumption related to vehicle climate control. Dedicated to renewable and energy-efficient solutions, the VTIF showcases technologies and systems designed to increase the viability of sustainably powered vehicles. NREL researchers instrument every class of on-road vehicle, conduct hardware and software validation for EV components and accessories, and develop analysis tools and technology for the Department of Energy, other government agencies, and industry partners.

  14. Research on Chaos Particle Swarm Optimization Algorithm for Vehicle Routing Problem%车辆路径问题的混沌粒子群算法研究

    Institute of Scientific and Technical Information of China (English)

    李毅; 陆百川; 刘春旭

    2012-01-01

    According to characters of the vehicle routing problem, a novel chaos particle swarm optimization ( CPSO) algorithm was proposed to solve the basic type of single depot and non-full load. After the chaos was introduced to the particle swarm optimization(PSO) , the random, regularity and ergodicity were used to initialize particles in order to cover the solution space of the vehicle routing problem in large range, enhance the ability for optimal route searching, and prevent the su-boptimal solution of the PSO in the way of exerting chaos disturbance at the place of suboptimal solution to help algorithm to abandon the current searching route. Illustration results showed the CPSO had the strong ability to search the global optimal in the vehicle routing problem.%针对车辆路径问题中单仓库非满载这一基本类型的具体特性,设计了一种混沌粒子群算法;利用混沌系统的随机性、规律性和遍历性初始化粒子,大范围覆盖车辆路径问题的解空间,加强算法最优路径的搜索能力;通过在求解过程中的次优路径处施加混沌扰动,使算法放弃当前求解的路径,避免结果为次优解.并通过试验验证了该算法在车辆路径问题中具有很强的寻优能力.

  15. 基于进化策略的开放式车辆路径问题%Research on Evolution Strategy for Open Vehicle Routing Problem

    Institute of Scientific and Technical Information of China (English)

    朱超; 许兆义; 尹智宏

    2011-01-01

    Open Vehicle Routing Problem (OVRP) is an extension of the classic vehicle routing problem (VR P), in which the vehicle does not return to the starting depot after serving the last customer. The paper presents a modified evolution strategy for the OVRP. The proposed method generates the initial population based on a strictly generational course and offsprings are produced solely via mutation based on different trajectories. A multi-parent recombination operator is used to determine the strategy parameters. The paper also examines the performance of the proposed method by use of some well-known examples. Results show that the proposed ES is an effective tool for OVRP.%开放式车辆路径问题(OVRP)是标准车辆路径问题(VRP)的一个扩展,该问题是针对车辆在服务完最后一个顾客点后不需要回到车场的车辆路径问题.针对这类问题,提出了一种改进的进化策略.首先通过优化选择方案研究初始种群,然后基于轨迹进行变异获得子代,同时通过多父代组合来确定每个个体的策略参数.最后,通过若干经典OVRP实例对该算法进行了检验,结果表明这种改进的进化策略是一种求解OVRP问题的有力工具,

  16. Space vehicle chassis

    Energy Technology Data Exchange (ETDEWEB)

    Judd, Stephen; Dallmann, Nicholas; Seitz, Daniel; Martinez, John; Storms, Steven; Kestell, Gayle

    2017-07-18

    A modular space vehicle chassis may facilitate convenient access to internal components of the space vehicle. Each module may be removable from the others such that each module may be worked on individually. Multiple panels of at least one of the modules may swing open or otherwise be removable, exposing large portions of the internal components of the space vehicle. Such chassis architectures may reduce the time required for and difficulty of performing maintenance or modifications, may allow multiple space vehicles to take advantage of a common chassis design, and may further allow for highly customizable space vehicles.

  17. Research on Military Highway Vehicle Transportation Scheduling System%全军公路运输指挥调度系统研究

    Institute of Scientific and Technical Information of China (English)

    王玮; 杨晶

    2008-01-01

    公路运输是军队后勤保障的一项重要组成部分.在对道路网分析的基础上,针对不同的运输任务提出了针对公路运输指挥的道路选优数学模型.给出了解决车辆调度问题(Vehicle Scheduling Problem,简称VSP)的启发式算法,即C-W节约启发式算法.

  18. 汽车发动机盖抗凹性的研究与应用%The Researching and Application of BIW Panel Denting on Vehicle Hood

    Institute of Scientific and Technical Information of China (English)

    张建伟; 柴志; 杨邦安

    2014-01-01

    某车型发动机盖抗凹性不足。本文对抗凹性的原理进行分析,并提出了改进建议,对发动机盖设计有较好的指导建议。%BIW panel denting of the vehicle hood is not meet target.In this paper, by analyzing the matter of BIW panel denting, and giving the melioration suggestion, which is prodound for the hood design.

  19. How important is vehicle safety in the new vehicle purchase process?

    Science.gov (United States)

    Koppel, Sjaanie; Charlton, Judith; Fildes, Brian; Fitzharris, Michael

    2008-05-01

    Whilst there has been a significant increase in the amount of consumer interest in the safety performance of privately owned vehicles, the role that it plays in consumers' purchase decisions is poorly understood. The aims of the current study were to determine: how important vehicle safety is in the new vehicle purchase process; what importance consumers place on safety options/features relative to other convenience and comfort features, and how consumers conceptualise vehicle safety. In addition, the study aimed to investigate the key parameters associated with ranking 'vehicle safety' as the most important consideration in the new vehicle purchase. Participants recruited in Sweden and Spain completed a questionnaire about their new vehicle purchase. The findings from the questionnaire indicated that participants ranked safety-related factors (e.g., EuroNCAP (or other) safety ratings) as more important in the new vehicle purchase process than other vehicle factors (e.g., price, reliability etc.). Similarly, participants ranked safety-related features (e.g., advanced braking systems, front passenger airbags etc.) as more important than non-safety-related features (e.g., route navigation systems, air-conditioning etc.). Consistent with previous research, most participants equated vehicle safety with the presence of specific vehicle safety features or technologies rather than vehicle crash safety/test results or crashworthiness. The key parameters associated with ranking 'vehicle safety' as the most important consideration in the new vehicle purchase were: use of EuroNCAP, gender and education level, age, drivers' concern about crash involvement, first vehicle purchase, annual driving distance, person for whom the vehicle was purchased, and traffic infringement history. The findings from this study are important for policy makers, manufacturers and other stakeholders to assist in setting priorities with regard to the promotion and publicity of vehicle safety features

  20. Advanced Vehicle and Power Initiative

    Science.gov (United States)

    2010-07-29

    bases.) Qualifying advanced propulsion vehicles for this initiative are battery electric vehicles (BEV), hybrid electric vehicles (HEV), hybrid...hydraulic vehicles (HHV), plug-in hybrid electric vehicles (PHEV) and fuel cell electric vehicles (FCEV). The AVPI integrates use of renewable energy at

  1. Distributed control system for vehicles

    Science.gov (United States)

    Callen, Jeffrey N.; Iaconis, John M.

    1997-01-01

    Previously, control systems for remotely controlled vehicles (RCVs) and unmanned ground vehicles (UGVs) have largely been of a centralized design, in which all vehicles sensing and servo control systems are individually interfaces to a central computer. These controllers often have been completely redeveloped for each new application. This approach leads to increased development, installation, and maintenance costs, and to a product that is not easily adaptable to other platforms or tasks. Under a Phase II SBIR program, RedZone Robotics is developing a distributed control systems (DCS) that reduces development, installation, and maintenance costs while enhancing adaptability to other platforms or applications. The DCS consists of a distributed control network of small, intelligent local controller nodes acting on the vehicle motion and sensing system components. A central card oversees the network and handles higher level commands. The central card and local nodes are linked through the controller area network serial bus. The node hardware is of standardized design so that application specific tasks are largely accomplished in software. The standardized design makes the DCS potentially compatible with multiple UGV platforms and eventual dual-use applications in commercial vehicles. More sophisticated functionality, such as remote control or autonomous navigation can be layered on top of the low level control supplied by DCS. Thus, the DCS can be an enabling component for development of advanced UGV technologies. ALso, intelligent nodes enable fault identification and orderly shutdown to be accomplished directly at the vehicle actuators. This SBIR is sponsored by the US Army Tank-Automotive Research, Development and Engineering Center.

  2. TIRE MODELS USED IN VEHICLE DYNAMIC APPLICATIONS AND THEIR USING IN VEHICLE ACCIDENT SIMULATIONS

    Directory of Open Access Journals (Sweden)

    Osman ELDOĞAN

    1995-01-01

    Full Text Available Wheel model is very important in vehicle modelling, it is because the contact between vehicle and road is achieved by wheel. Vehicle models can be dynamic models which are used in vehicle design, they can also be models used in accident simulations. Because of the importance of subject, many studies including theoretical, experimental and mixed type have been carried out. In this study, information is given about development of wheel modelling and research studies and also use of these modellings in traffic accident simulations.

  3. 基于 VANET环境高速公路车辆换道安全车距研究%Research on Safety Distance between Lane-changing Vehicles on Expressways Based on the VANET Environment

    Institute of Scientific and Technical Information of China (English)

    姜华; 林加华

    2016-01-01

    高速公路具有车速快、车辆多的特点,由于车辆换道发生追尾的交通事故,造成的经济损失较为惨重。本文基于VANET环境,在典型的换道场景中,利用V2 V通信的技术,根据汽车动力学原理,通过对换道的4个阶段的分析研究,提出了车辆从本车道变换到目标车道,与目标车道的前车应保持的换道安全车距模型,最后在NCTUNS网络仿真软件下建立了仿真实验环境。实验结果表明,换道安全车距模型是正确的,具有较好的实用性,可为汽车自动驾驶、辅助驾驶或预警系统的应用奠定基础。%Fast and crowded,vehicles on expressways easily run into each other when changing lanes, resulting in huge losses. This paper presents a research based on the VANET environment where the V2V communication technology is employed to analyze the four stages of a typical lance changing operation to suggest a safety distance model for a vehicle attempting to change from the current lane to the destination one according to theories of vehicle dynamics. Finally,a simulation experimental environment is set up with the help of the network simulation tool ! NCTUNS. Results of the experiment show that the model of safety distance for lane changing vehicles is workable and practical and can thus be applied to automatic drive,assisted drive and the collision warning systems of vehicles.

  4. Research on the application of big data based on vehicle networking%基于车联网的大数据应用研究

    Institute of Scientific and Technical Information of China (English)

    梁雪辉

    2016-01-01

    大数据技术具有数据处理量大、可处理非结构化数据、实时性高等特点.针对交通安全问题,提出将大数据技术应用于车联网中数据采集、数据分析和数据处理的问题.基于大数据技术,管理所有系统数据资源,并进行各种智能化数据分析处理.立足于为车联网提供智能支撑,让用户体验到交通管理智能化.%Big Data technology has the characteristics of processing large amount of data,real-time and dealing with unstructured data.Aiming at the problem of traffic safety,we put forward the Big Data technique is used to solve the problems of data collection,data analysis and data processing in Vehicle networking affects the traffic safety.Based on Big Data technology,managing all the data resources of the transport sectors and a variety of intelligent data analysis processing,We provide intelligent support for the Vehicle networking,allowing users to experience the intelligence of traffic management.

  5. 车辆运行信息无线传输可行性研究%Research on Wireless Transmission for Vehicle Running Information

    Institute of Scientific and Technical Information of China (English)

    余忠皋; 张宇探

    2014-01-01

    本文基于用户车辆运行信息采集装置,设计了运行信息无线传输可行性试验的方案。包括分别进行了静态与动态传输测试,不同道路(区域)传输测试和传输稳定性测试。根据试验结果,对测试网络的传输速度和稳定性进行了评估。本文的研究内容为车辆运行信息无线回传的实施提供了重要数据支撑。%This assay designed a test of data transmission feasibility via wireless network for vehicle running signal acquisition system. Static test and dynamic test were carried out respectively as well as tests in different road types. According to the results, network transmission speed and its stability were then evaluated. This assay provides important references for vehicle running data wireless transmission.

  6. 混合动力汽车超级电容能量控制研究%Research on hybrid electric vehicle supercapacitor energy control

    Institute of Scientific and Technical Information of China (English)

    陈坤华; 孙玉坤; 王富良; 项倩雯

    2015-01-01

    超级电容的高功率密度特性可作为混合动力汽车辅助电源。研究了超级电容数学模型,给出了超级电容荷电状态估计方法,在分析升降压双向直流功率电路基础上,提出了超级电容能量存储系统控制策略,在超级电容荷电状态允许范围内,该控制策略满足混合动力汽车启动、加速、制动要求,实验证明该能量存储系统能适应各种负载变换情况。%Hybrid electric vehicle can use high power density supercapacitor as auxiliary power. The maths model of supercapacitor was studied. The estimation method of state of charge of supercapacitor was given. Based on the analysis of the buck-boost converter, the control strategy of supercapacitor energy storage was proposed. At the permitted range of state of charge of supercapacitor, the control strategy can meet the needs of hybrid electric vehicle start, acceleration and brake. Experiments prove the energy storage system can adapt various changes of loads.

  7. 基于Qt/Embedded的车载GUI的研究与实现%Research and Implement of Vehicle GUI Based on Qt/Embedded

    Institute of Scientific and Technical Information of China (English)

    周超杰; 孔繁虹

    2012-01-01

    开发具有友好的人机交互界面和现场可操作性的嵌入式系统是开发智能车载终端的重要环节.使用嵌入式Linux操作系统作为底层软件平台,并使用嵌入式Qt/Embedded (Qt/E)图形用户界面库作为开发工具,设计一种友好的车载人机交互界面.重点介绍了Qt/E开发平台的搭建和Qt/E的绘图机制,并给出车载GUI中关键模块的实现过程.%Developing friendly interactive interface and on-site operational embedded systems is an important part of development of intelligent vehicle terminal. This paper uses an embedded Linux operating system as the underlying software platform and the embedded Qt/Embedded ( Qt/E) as a graphical user interface library development tools to design a car-friendly interactive interface. Focuses on the building of Qt/E development platform and Qt/E drawing mechanism and describes the implementation process of the key module in vehicle GUI.

  8. 低碳交通电动汽车碳减排潜力及其影响因素分析%Research on Carbon Reduction Potential of Electric Vehicles for Low-Carbon Transportation and Its Influencing Factors

    Institute of Scientific and Technical Information of China (English)

    施晓清; 李笑诺; 杨建新

    2013-01-01

    交通运输是城市能源消耗和碳排放的重点行业,为通过节能减排实现低碳城市发展目标,传统汽油车向新能源汽车的转型是一项重要的举措,其中电动汽车因其节能减排的优势将在这次转型中发挥重要作用.在全面总结现有电动汽车节能减排研究成果的基础上,分析了影响电动汽车的减排因素,并应用燃料生命周期的理论,结合北京市的电动汽车推广计划,以纯电动汽车为例,采用改进的燃料碳排放模型,并设置6种情景分析了电动汽车的碳排放及其减排潜力,包括发电能源结构、车用燃料类型(单位燃料的CO2排放系数)、汽车类型(百公里能耗)、城市交通状况(时速)、煤电发电技术、电池类型(重量、能效)等因素对电动汽车减排潜力的影响.结果表明,改进后的模型能更科学测算燃料消耗碳排放;纯电动汽车具有明显的制约性碳减排潜力,在分析的6种影响因素中其波动幅度为57% ~ 81.2%,其中,发电能源结构和煤电技术供电路线对电动汽车燃料生命周期碳减排空间起决定性作用,其减排空间分别可达78.1%及81.2%.最后从改善能源结构、提高煤电技术、推广节能技术、加快动力蓄电池研发、推广纯电动汽车等方面提出了推广电动汽车降低交通能耗和碳排放的优化措施,以期为低碳交通新能源汽车转型政策的制定提供科学依据和方法支撑.%Transportation is the key industry of urban energy consumption and carbon emissions. The transformation of conventional gasoline vehicles to new energy vehicles is an important initiative to realize the goal of developing low-carbon city through energy saving and emissions reduction, while electric vehicles ( EV) will play an important role in this transition due to their advantage in energy saving and lower carbon emissions. After reviewing the existing researches on energy saving and emissions reduction of

  9. Market potentials and CO{sub 2} balance of electromobility. Work packages 2 to 5 of the research project OPTUM. Optimization of the potentials of environmental relief of electric-powered vehicles; Marktpotenziale und CO{sub 2}-Bilanz von Elektromobilitaet. Arbeitspakete 2 bis 5 des Forschungsvorhabens OPTUM. Optimierung der Umweltentlastungspotenziale von Elektrofahrzeugen

    Energy Technology Data Exchange (ETDEWEB)

    Hacker, Florian; Harthan, Ralph; Kasten, Peter; Loreck, Charlotte; Zimmer, Wiebke

    2011-10-15

    Germany wants to reduce its greenhouse gas emissions by 40% up to 2020 compared to 1990. Among other reasons, the Federal Government promotes the electromobility. The overall target of this research project is to investigate the environment relief by electric-powered vehicles. The key objectives of this investigation are: (a) Analysis of the acceptance and attractiveness of electric-powered vehicles; (b) Derivation of market potential for electric-powered vehicles; (c) Consideration of the interaction with the energy sector; (d) Determination of the potential of elecromobility in the reduction of CO{sub 2} emissions.

  10. Research on the Open Incident Vehicle Routing Problems%开放式关联运输调度问题的研究

    Institute of Scientific and Technical Information of China (English)

    汤雅连; 蔡延光; 黄刚

    2013-01-01

    Aiming at Open Incident Vehicle Routing Problem with Soft Time Windows ( OIVRPSTW) and relating to the VRP( Vehicle Routing Problem ) of goods supply in chain stores , this paper introduces the fundamental principle of PSO ( Particle Swarm Optimization ) , adopting the nonlinear dynamic self -adapting method to adjust inertia weight factor , so that the weight factor can change along with the target value , combined with the advantage of using chaos to generate initial population and design a kind of CPSO(Chaos Particle Swarm Optimizaton).Meanwhile, SA (simulated annealing) mechanism is brought in the CGA (Chaos Genetic Algorithm), adjusting crossover probability and mutation probability adaptively .At last, both of the modified algorithms are applied to solve OIVRPSTW , so does GA ( Genetic Algorithm ) .The result shows that the advantage of using chaos to generate ini-tial population is flexible to solve this kind of OIVRP and can obtain the satisfied result .%针对带软时间窗的开放式关联运输调度问题( Open Incident Vehicle Routing Problem with Soft Time Windows, OIVRPSTW),联系实际应用中连锁店超市中货物供应的车辆路径问题,介绍了粒子群算法的基本原理,采用一种非线性动态自适应调节惯性权重因子的方法,使得惯性系数会随着粒子目标值的变化而自动改变,结合混沌搜索产生初始种群的方法,设计了一种混沌粒子群优化算法。同时也设计了引入了模拟退火机制的混沌遗传算法,自适应地调整交叉概率和变异概率。并用这两种算法来对OIVRPSTW求解,然后与基本的遗传算法求解此模型的结果相比较。实例证明用混沌搜索产生初始种群的方法在求解此类开放式关联运输调度问题是可行的,能取得令人满意的效果。

  11. Research and Simulation of Assist Robot Driving Vehicle%辅助实现机器人驾驶车辆的研究与仿真

    Institute of Scientific and Technical Information of China (English)

    杨琼琼; 孔斌; 朱勇军

    2014-01-01

    针对机器人驾驶汽车在未知复杂环境下行驶的问题,提出一种基于图像的辅助实现机器人驾驶车辆的方法。根据机器人驾驶过程中所拍摄的路面图像,在图像中取一点作为车辆行驶的目标位置点;根据此点的位置,计算出车辆行驶时的转弯半径;对方向盘转角与转弯半径之间的关系进行曲线拟合,计算得出方向盘的转角;根据转角信息在图像上画出可供参考的车辆可行驶辅助线。本文算法利用 matlab 进行了仿真研究,实验结果表明,采用这种方法获取辅助线能够较为准确的作为车辆行驶的参考,为辅助机器人驾驶车辆行驶带来了很大的便利。%In this paper we present a kind of auxiliary line access method based on image approach to help humanoid robots driving a car in a complicated unknown environments. According to road image taken during driving robot , a point was picked as the next point of the robot driving. According to the location of this point, calculate turning radius. On the steering wheel angle and the turning radius curve fitting, steering wheel angle calculated; According to the Angle of information and draw the vehicle auxiliary line on the image. This algorithm simulated on matlab environment, experimental results show that this method can obtain more accurate auxiliary lines as a reference when the vehicle driving, and bring great convenience to assist the robot successfully driving the vehicle.

  12. 履带车辆试验路面统计特性的仿真%Modeling Research on Road Used for Virtual Experiment of Tracked Vehicle

    Institute of Scientific and Technical Information of China (English)

    薛劲橹; 王红岩; 迟宝山

    2012-01-01

    3D stochastic road model for the virtual test of tracked vehicle is built by using Matlab programming, and the power spectral estimation on the toad roughness of single path and the verification on the correlation among different single paths are conducted. A universal algorithm for node creation of 3D road surface suitable for tracked vehicle module ATV in Adams software is created. The effects of mesh size on the accuracy of road surface model are analyzed for both 3D stochastic road and road with definite profile respectively. A virtual test of vehicle straight running on stochastic road is performed. The results show that the 3D and 2D stochastic roads give quite different results of virtual tests. 3D stochastic road can simulate the action of loads in both vertical and lateral directions so is superior to 2D stochastic road.%利用Matlab编程建立了用于履带车辆虚拟试验的三维随机路面模型,并对单道路面不平度进行了功率谱估计和不同单道相关性验证.创建了适用于Adams软件履带车辆模块(ATV)路面模型的三维路面节点生成通用算法.分别分析了三维随机路面和有确定外形路面网格数量对路面模型精度的影响.在随机路面上进行车辆直驶虚拟试验,结果表明,三维随机路面的虚拟试验结果与二维随机路面的有较大不同;三维随机路面可以模拟车辆垂向和侧向两个方向载荷的作用,优于二维随机路面.

  13. Research

    African Journals Online (AJOL)

    ebutamanya

    2015-09-01

    Sep 1, 2015 ... doctors, nurses, and pharmacists are one of the most important group of workers facing such .... while the highest obesity rates (31.7%) were documented among motor vehicle operators[25]. ..... patients' safety?. Nurs Econ.

  14. Research and Implementation of Frequency Synchronization in Vehicle Communication System based on IEEE 802.11p%基于802.11p的车辆通信系统频率同步研究与实现

    Institute of Scientific and Technical Information of China (English)

    沈佳伟; 罗涛; 黄丽娜

    2014-01-01

    车联网作为移动互联网的重要组成部分,正在蓬勃发展,人们对于车联网中车辆通信的质量需求也越来越高。IEEE 802.11p作为车联网中车车/车路协同通信的主要技术标准,其物理层采用64点的OFDM技术。OFDM对频偏敏感,在车辆通信中,由高速运动造成的多普勒频移会对信号接收造成严重影响。因此,对802.11p中的频率同步研究具有重要意义。本文给出了一种在802.11p下适用于车辆通信的频率同步算法,再利用短训练符号做频偏粗估计的基础上利用导频做相位跟踪,并进行了硬件实现和使用验证。对于FPGA实现中遇到的一些问题给出了适用于硬件实现的解决方法,为车辆通信系统的研究与应用提供了借鉴。%As an important part of Mobile Internet, Telematics is booming and people’s require-ment of vehicle communication quality is higher. IEEE 802.11p is the main technical standard of V2V/V2I cooperative communication in telematics, the OFDM technology of 64 FFT points is used in its physical layer. OFDM is sensitive to frequency offset and Doppler frequency shift caused by high-speed movement in vehicle communication has serious effects on signal receiving. Therefore, the research on frequency synchronization of 802.11p has important significance. This paper presents a frequency syn-chronization algorithm in 802.11p which is suitable for vehicle communication and the algorithm is implemented on FPGA hardware and is verified. For some problems encountered in the implementation of FPGA, this paper gives some solutions and provides the reference for the research and application of ve-hicle communication system.

  15. Statistical Characterization of Medium-Duty Electric Vehicle Drive Cycles; NREL (National Renewable Energy Laboratory)

    Energy Technology Data Exchange (ETDEWEB)

    Prohaska, R.; Duran, A.; Ragatz, A.; Kelly, K.

    2015-05-03

    With funding from the U.S. Department of Energy’s Vehicle Technologies Office, the National Renewable Energy Laboratory (NREL) conducts real-world performance evaluations of advanced medium- and heavy-duty fleet vehicles. Evaluation results can help vehicle manufacturers fine-tune their designs and assist fleet managers in selecting fuel-efficient, low-emission vehicles that meet their economic and operational goals. In 2011, NREL launched a large-scale performance evaluation of medium-duty electric vehicles. With support from vehicle manufacturers Smith and Navistar, NREL research focused on characterizing vehicle operation and drive cycles for electric delivery vehicles operating in commercial service across the nation.

  16. Analysis of Vehicle-Based Security Operations

    Energy Technology Data Exchange (ETDEWEB)

    Carter, Jason M [ORNL; Paul, Nate R [ORNL

    2015-01-01

    Vehicle-to-vehicle (V2V) communications promises to increase roadway safety by providing each vehicle with 360 degree situational awareness of other vehicles in proximity, and by complementing onboard sensors such as radar or camera in detecting imminent crash scenarios. In the United States, approximately three hundred million automobiles could participate in a fully deployed V2V system if Dedicated Short-Range Communication (DSRC) device use becomes mandatory. The system s reliance on continuous communication, however, provides a potential means for unscrupulous persons to transmit false data in an attempt to cause crashes, create traffic congestion, or simply render the system useless. V2V communications must be highly scalable while retaining robust security and privacy preserving features to meet the intra-vehicle and vehicle-to-infrastructure communication requirements for a growing vehicle population. Oakridge National Research Laboratory is investigating a Vehicle-Based Security System (VBSS) to provide security and privacy for a fully deployed V2V and V2I system. In the VBSS an On-board Unit (OBU) generates short-term certificates and signs Basic Safety Messages (BSM) to preserve privacy and enhance security. This work outlines a potential VBSS structure and its operational concepts; it examines how a vehicle-based system might feasibly provide security and privacy, highlights remaining challenges, and explores potential mitigations to address those challenges. Certificate management alternatives that attempt to meet V2V security and privacy requirements have been examined previously by the research community including privacy-preserving group certificates, shared certificates, and functional encryption. Due to real-world operational constraints, adopting one of these approaches for VBSS V2V communication is difficult. Timely misbehavior detection and revocation are still open problems for any V2V system. We explore the alternative approaches that may be

  17. 动车组车载信息实时传输方案研究%Research on scheme of EMUs vehicle information real-time transmission

    Institute of Scientific and Technical Information of China (English)

    吕赫

    2013-01-01

    The paper summarized the real-time transmission technology of vehicle information and the concurrent network system technology of high load at home and abroad, put forward a technical project of concurrent network system of high load based on asynchronous time-sharing queue, promoted the stability of real-time data while the train was running at high speed.%本文以国内外车载信息实时数据传输及高负载大并发网络系统技术为基础,提出了一种基于异步分时队列技术实现的高负载大并发网络系统技术方案,该方案可以提高列车在高速运行下实时数据的稳定性.

  18. Research results from the advanced lead-acid battery consortium point the way to longer life and higher specific energy for lead/acid electric-vehicle batteries

    Energy Technology Data Exchange (ETDEWEB)

    Moseley, P.T. [The International Lead Zinc Research Organization, Research Triangle Park, NC (United States)

    1998-05-18

    Amidst the welter of publicity devoted to the newer battery chemistries, the remarkable progress made by lead/acid battery technologists in response to the needs of the emerging electric-vehicle market has tended to be overlooked. The flooded design of battery, launched by Gaston Plante around 1860, has given way to a valve-regulated variant which has a history dating only from the 1970s. The key parameters of this `maintenance free` battery have been improved markedly during the course of the development programme of the advanced lead-acid battery consortium (ALABC), and it is likely that lead/acid will continue to feature strongly in motive-power applications as a result of its cost advantage and of its enhanced effectiveness. (orig.)

  19. Research on a 20-Slot/22-Pole Five-Phase Fault-Tolerant PMSM Used for Four-Wheel-Drive Electric Vehicles

    Directory of Open Access Journals (Sweden)

    Yi Sui

    2014-03-01

    Full Text Available This paper presents a five-phase fault-tolerant permanent-magnet synchronous machine (PMSM used for electric vehicles. In multiphase fault-tolerant PMSMs equipped with fractional-slot concentrated windings, excessive magneto-motive force (MMF harmonics can lead to thermal demagnetization of the permanent magnets (PMs. In order to reduce the lower-order harmonics, the origins of the 2-pole harmonic in conventional winding configurations are investigated, and an unequal-turn winding configuration is applied to cancel the lower-order harmonics. The main electromagnetic performances of the unequal-turn winding configuration are investigated and compared with conventional winding topologies. Based on the principle of maintaining constant instantaneous power, the fault-tolerant control strategies for open-circuits of up to two phases are developed. All of the investigations are verified by finite element analysis (FEA results.

  20. 某车型正面碰撞耐撞性与轻量化研究%Lightweight and Frontal Structural Crashworthiness Research on a Vehicle

    Institute of Scientific and Technical Information of China (English)

    胡远志; 梁永福; 刘西; 周林

    2016-01-01

    First front crash for a mini-MPV was simulated and correlated with its test using finite element meth-od, and the vehicle structural crashworthiness was optimized based on the test data and the model.Then under the premise of satisfying the requirement of crashworthiness and basically remaining its stiffness, modal and so on, a method was provided to maximum reduce components’ masses to light weight and control cost.Finally, a frontal crash test of this optimized vehicle was performed to verify that the structure optimization and lightweight method is feasible.%针对国内某款微型MPV,首先用有限元方法进行正面100%碰撞工况数值模拟和对标,在基础模型和试验数据的基础上进行正面碰撞的结构耐撞性优化。然后在保证车身结构满足耐撞性要求,刚度、模态等其他性能基本不变的前提下,最大限度地减轻各零部件的质量,实现车身的轻量化和成本控制。最后通过100%正碰实车试验验证了此结构优化和轻量化方案是可行的。

  1. 轮毂电机驱动车辆转向控制策略%Research on Steering Control Strategy for In-Wheel Motor Drive Vehicle

    Institute of Scientific and Technical Information of China (English)

    刘春光; 阳贵兵; 廖自力; 李嘉麒

    2016-01-01

    为提高轮毂电机驱动车辆转向机动灵活性以及安全稳定性,提出了一种基于直接横摆力矩控制的转向控制策略。以带有双桥转向机构的8轮轮毂电机驱动车辆为研究对象,研究其双重转向控制问题,建立基于车辆二自由度单轨模型的车辆参考模型,并以横摆角速度作为控制变量,建立基于横摆力矩PID控制器和横摆力矩分配控制器的转向分层控制模型。利用硬件在环实时仿真实验对所提出的转向控制策略的可行性和有效性进行分析验证。%In order to improve the steering flexibility,security and stability of the in-wheel motor drive vehicle,a steering control strategy based on DYC (Direct Yaw Moment Control)is established. The double-axle steering mechanism is taken as an object of study for its dual steering control. A vehicle model is established based on a monorail model with 2 degree of freedom. And a hierarchical control model based on PID controller and yaw moment distribution controller,in which the yaw angular velocity is chosen to be a controlling variable. The steering control strategy established in this paper is proven to be feasible and effective through the HIL(Hardware-in-Loop)real time simulation.

  2. Research of Vehicle Location Assisted by Bluetooth Signposts%蓝牙路标辅助车辆定位方法研究

    Institute of Scientific and Technical Information of China (English)

    孙亚飞; 潘通

    2015-01-01

    车辆定位是智能交通系统的核心部分,现有车载导航大多采用GPS与DR航位推算系统组合的方式.针对GPS/DR车载导航系统在高楼、遂道等GPS被遮挡情况下存在定位盲区的问题,该文利用蓝牙路标信息,在导航盲区安装蓝牙路标传感器,对GPS/DR定位结果进行修正.该课题中重点研究了蓝牙路标传感器定位误差修正方法,并分析了路标定位误差模型.研究结果表明:当车速70 km/h,且<170 km/h,位置修正精度可以达到20m以内.%The vehicle location is the core part of intelligent transportation system, most of the existing vehicle navigation use GPS and Dead Reckoning(DR) navigation system. To solve the GPS/DR system problems of positioning blind area problem in high-rise buildings or tunnels,this paper uses bluetooth information, and installs bluetooth signposts sensor in navigation blind area,to correct the GPS/DR positioning results.This topic mainly studies the positioning error correction methods of bluetooth signposts sensor, and analyzes the signpost positioning error model.The results show that when the speed is less than 70 km/h, fixed position accuracy using bluetooth signposts can reach 10 meters;when the speed is more than 70km/h, and less than 170km/h, position correction precision can reach within 20 meters.

  3. Research of vehicle license plate recognition based on OpenCV%基于OpenCV的车牌识别系统研究

    Institute of Scientific and Technical Information of China (English)

    姜宇; 张子潮; 周富强

    2011-01-01

    车牌识别系统是以汽车牌照为特定目标的专用计算机视觉系统.是智能交通系统的重要组成部分.介绍了一种基于Visual C++平台与Intel开源计算机视觉库OpenCV的静态复杂背景下的车牌识别系统的开发方式.该方式中采用空间域滤波和形态学方法确定车牌的轮廓.采用频域、空间域分析和几何校正相结合的方法对车牌歪斜情况进行校正,最后通过字符分割和模板匹配实现车牌号码识别.经在Visual C++平台下验证,此方法适用于车牌歪斜的情况,识别速度快,准确率高.%Vehicle license plate recognition system is a specified computer vision system on license plate and an important part of the intelligent traffic system. This paper introduces a method of vehicle license plate recognition in a complex background based on Visual C+ + and a Intel open source computer vision library OpenCV. The method adopts the way of space domain filtering and morphological processing to locate the license plate, rectifies the beveled plate using a combination of frequency domain and space domain analysis and geometric rectification, and achieves license number recognition by character segmentation and matching. The method has been implemented on Visual C + + on beveled plate and turnod out to be efficient and accurate.

  4. 纯电动汽车自动同步换挡系统设计%Automatic Synchronization Shift of Pure Electric Vehicle System Design and Research

    Institute of Scientific and Technical Information of China (English)

    张进; 沈安文

    2011-01-01

    The transmission of the pure electric vehicle has important sense, can improve the electric starting performance and accelerating ability, climbing performance, high-speed performance and improve the maximum mileage of electric vehicle. Through the comparison and analysis of several existing transmission advantages and disadvantages, learn these types of transmission systems based on self-5development and design of a synchronous system (AST) .the article describes in detail the internal structure of AST systems, structural design and work principle, AST system experiment platform and gear shift strategy and process to achieve, through experimental results obtained a good description of AST system, excellent performance, with high practical value.%变速器对纯电动汽车具有重要意义,可以改善电动汽车的起步性能、加速性能、爬坡性能、高速性能以及提高电动汽车最高续航里程.本文对比分析现有几种变速器的优缺点,借鉴这几种变速器系统的基础上,自行开发设计自动同步换挡变速器系统(AST),文章详细介绍AST系统的内部结构,结构设计与工作原理,AST系统的实验平台以及AST换挡策略和换挡过程实现,通过实验得到的实验结果很好的说明AST系统优异性能,具有很高的实用价值.

  5. 菱形车回正性能分析与研究%Analysis and Research of Returnability for Rhombic Vehicles

    Institute of Scientific and Technical Information of China (English)

    查云飞; 钟志华; 张义

    2009-01-01

    Since the special layout of steering system,the rhombic vehicle cannot obtain the returnability by means of the steering wheel's orientation parameters.A spring returnable structure was used to turn around the revolving drum of the steering system to carry out the returnablity of the steering wheel.The analysis of steering resistance torque and returnable torque suggests that extra torque is necessary to obtain the returnability.The formula of the locus was obtained based on the analysis.The returnability test suggests the spring returnable system can ensure good returnability of the rhombic vehicles.%菱形车特殊的转向轮结构布置,导致菱形车无法通过转向轮定位参数实现回正.采用弹簧回正机构驱动菱形车转向系统的转筒回转,实现转向轮的回正.通过对菱形车的转向阻力矩和回正力矩的分析,认为要使转向轮实现回正需要施加外加力矩,并推导出了弹簧回正机构的曲线方程.通过转向回正性能试验验证了弹簧回正机构具有较好的回正性能,解决了菱形车的回正问题.

  6. Research of the Effect of the Characteristic of Silicone Oil Viscous Limited Slip Differential to the Vehicle's Controllability%硅油式防滑差速器特性对汽车操纵性能的影响研究

    Institute of Scientific and Technical Information of China (English)

    盛德号; 王志

    2012-01-01

    The mensuration test on the characteristic of transferring torque of viscous limited slip differential is introduced by using of electrical - control driveline test - rig, in order to study the torque characteristic of the viscous limited slip differential. In addition, the contrast parameters determined by computer simulation experiment, such as turning radius ratio, yaw velocity, lateral acceleration and etc, are analyzed to research on the effect of torque charac-teristic of viscous limited slip differential to the vehicle's controllability. The test results show that if the limited torque of viscous limited slip differential is appropriate, the vehicle of viscous limited slip differential is better controllable than the ordinary vehicle Differential.%为了研究硅油式防滑差速器的转矩输出特性,通过电控动力传动系试验台对硅油式防滑差速器转矩输出特性进行了测定试验.通过仿真对比试验测定汽车转弯半径比、横摆角速度及侧向加速度等,并作为对比参数来考察硅油式防滑差速器转矩特性对汽车操纵稳定性的影响.仿真试验结果表明,若硅油式防滑差速器的防滑转矩设计合适,汽车装硅油式防滑差速器比装普通差速器更有利于汽车的操纵稳定性.

  7. 带软时间窗的开放式满载车辆路径问题研究%Research on open vehicle routing problem with full load and soft-time windows

    Institute of Scientific and Technical Information of China (English)

    孙国华

    2011-01-01

    为满足某些生产制造企业的满载运输需求,针对运输任务对车辆具有独占性的特点,分析得到总运输费用的大小取决于车辆的空车行驶费用,在此基础上,将带软时间窗的开放式满载车辆路径问题转化为带软时间窗的多车场开放式车辆路径问题,在非对称图上建立了相应的数学模型,并设计了近邻粒子群算法对模型进行求解.设计算例对算法进行了验证,实验结果表明:该算法可以快速求得软时间窗的开放式满载车辆路径问题的满意解.%The full load transportation problem is researched to satisfy the demand of production enterprises. Based on the exclusive characteristic of this problem, it's concluded that the total transportation cost is determined by the empty-load transportation cost. Then the open vehicle routing problem with full load and soft-time windows is transferred to a multi-depot open vehicle routing problem with soft-time windows and a mixed-integer mathematical model is presented based on the transferred asymmetric graph. PSO algorithm with near neighbor interactions is given to solve the problem and is verified through an example. The experiment results prove the high efficiency of the algorithm to solve the open vehicle routing problem with full load and soft-time windows.

  8. Steering Performance, Tactical Vehicles

    Science.gov (United States)

    2015-07-29

    NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Automotive Instrumentation Division (TEDT-AT-AD-I) U.S. Army Aberdeen Test Center 400...characterize the on-center vehicle responses of military vehicles for the purposes of influencing vehicle design and ensuring military truck steering... mechanism attached to the test vehicle’s steering wheel (or replaces the steering wheel) that is strain gaged and calibrated to measure the steering effort

  9. Ground Vehicle Robotics

    Science.gov (United States)

    2013-08-20

    Ground Vehicle Robotics Jim Parker Associate Director, Ground Vehicle Robotics UNCLASSIFIED: Distribution Statement A. Approved for public...DATE 20 AUG 2013 2. REPORT TYPE Briefing Charts 3. DATES COVERED 09-05-2013 to 15-08-2013 4. TITLE AND SUBTITLE Ground Vehicle Robotics 5a...Willing to take Risk on technology -User Evaluated -Contested Environments -Operational Data Applied Robotics for Installation & Base Ops -Low Risk

  10. Electric Vehicle Propulsion System

    OpenAIRE

    2014-01-01

    Electric vehicles are being considered as one of the pillar of eco-friendly solutions to overcome the problem of global pollution and radiations due to greenhouse gases. Present thesis work reports the improvement in overall performance of the propulsion system of an electric vehicle by improving autonomy and torque-speed characteristic. Electric vehicle propulsion system consists of supply and traction system, and are coordinated by the monitoring & control system. Case of light electric veh...

  11. Cooperative sentry vehicles and differential GPS leapfrog

    Energy Technology Data Exchange (ETDEWEB)

    FEDDEMA,JOHN T.; LEWIS,CHRISTOPHER L.; LAFARGE,ROBERT A.

    2000-06-07

    As part of a project for the Defense Advanced Research Projects Agency, Sandia National Laboratories Intelligent Systems and Robotics Center is developing and testing the feasibility of using a cooperative team of robotic sentry vehicles to guard a perimeter, perform a surround task, and travel extended distances. This paper describes the authors most recent activities. In particular, this paper highlights the development of a Differential Global Positioning System (DGPS) leapfrog capability that allows two or more vehicles to alternate sending DGPS corrections. Using this leapfrog technique, this paper shows that a group of autonomous vehicles can travel 22.68 kilometers with a root mean square positioning error of only 5 meters.

  12. Intelligent vehicle electrical power supply system with central coordinated protection

    Science.gov (United States)

    Yang, Diange; Kong, Weiwei; Li, Bing; Lian, Xiaomin

    2016-07-01

    The current research of vehicle electrical power supply system mainly focuses on electric vehicles (EV) and hybrid electric vehicles (HEV). The vehicle electrical power supply system used in traditional fuel vehicles is rather simple and imperfect; electrical/electronic devices (EEDs) applied in vehicles are usually directly connected with the vehicle's battery. With increasing numbers of EEDs being applied in traditional fuel vehicles, vehicle electrical power supply systems should be optimized and improved so that they can work more safely and more effectively. In this paper, a new vehicle electrical power supply system for traditional fuel vehicles, which accounts for all electrical/electronic devices and complex work conditions, is proposed based on a smart electrical/electronic device (SEED) system. Working as an independent intelligent electrical power supply network, the proposed system is isolated from the electrical control module and communication network, and access to the vehicle system is made through a bus interface. This results in a clean controller power supply with no electromagnetic interference. A new practical battery state of charge (SoC) estimation method is also proposed to achieve more accurate SoC estimation for lead-acid batteries in traditional fuel vehicles so that the intelligent power system can monitor the status of the battery for an over-current state in each power channel. Optimized protection methods are also used to ensure power supply safety. Experiments and tests on a traditional fuel vehicle are performed, and the results reveal that the battery SoC is calculated quickly and sufficiently accurately for battery over-discharge protection. Over-current protection is achieved, and the entire vehicle's power utilization is optimized. For traditional fuel vehicles, the proposed vehicle electrical power supply system is comprehensive and has a unified system architecture, enhancing system reliability and security.

  13. Electric vehicle propulsion alternatives

    Science.gov (United States)

    Secunde, R. R.; Schuh, R. M.; Beach, R. F.

    1983-01-01

    Propulsion technology development for electric vehicles is summarized. Analytical studies, technology evaluation, and the development of technology for motors, controllers, transmissions, and complete propulsion systems are included.

  14. Assessment of the potential of hybrid vehicles: Summary

    Science.gov (United States)

    Surber, F. T.

    1980-01-01

    The potential of hybrid vehicles as a replacement of the conventional gasoline or diesel fueled internal combustion engine vehicle within the next 20 to 30 years, was assessed. Hybrid vehicle designs and applications which are technically and economically viable were studied to determine if reductions in petroleum usage were large enough to warrant major expenditures of research and development funds. Critical technical areas where research and development can be most usefully concentrated were identified.

  15. Variable Dynamic Testbed Vehicle: Dynamics Analysis

    Science.gov (United States)

    Lee, A. Y.; Le, N. T.; Marriott, A. T.

    1997-01-01

    The Variable Dynamic Testbed Vehicle (VDTV) concept has been proposed as a tool to evaluate collision avoidance systems and to perform driving-related human factors research. The goal of this study is to analytically investigate to what extent a VDTV with adjustable front and rear anti-roll bar stiffnesses, programmable damping rates, and four-wheel-steering can emulate the lateral dynamics of a broad range of passenger vehicles.

  16. Analysis of Natural Gas Vehicle Industry : none

    OpenAIRE

    Li, Zhen

    2014-01-01

    A vehicle powered by natural gas is becoming a prevalent trend and direction in automobile manufacturing. The thesis is aiming at analyzing the natural gas vehicle industry from its environmental effectiveness, economic effectiveness, recent status and its development in the near future with statistical data. And also it will find out the potential problems and relevant technologies. Investigation and literature research method are mainly used to fully collect the correct information and d...

  17. 75 FR 76692 - Federal Motor Vehicle Safety Standards; Small Business Impacts of Motor Vehicle Safety

    Science.gov (United States)

    2010-12-09

    ..., and 571 Federal Motor Vehicle Safety Standards; Small Business Impacts of Motor Vehicle Safety AGENCY... passenger vehicles, trucks, buses, trailers, incomplete vehicles, motorcycles, and motor vehicle...

  18. Advanced Wireless Power Transfer Vehicle and Infrastructure Analysis (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Gonder, J.; Brooker, A.; Burton, E.; Wang, J.; Konan, A.

    2014-06-01

    This presentation discusses current research at NREL on advanced wireless power transfer vehicle and infrastructure analysis. The potential benefits of E-roadway include more electrified driving miles from battery electric vehicles, plug-in hybrid electric vehicles, or even properly equipped hybrid electric vehicles (i.e., more electrified miles could be obtained from a given battery size, or electrified driving miles could be maintained while using smaller and less expensive batteries, thereby increasing cost competitiveness and potential market penetration). The system optimization aspect is key given the potential impact of this technology on the vehicles, the power grid and the road infrastructure.

  19. Key Technology of Flywheel Battery for Vehicle and Its Current Research Status%车载飞轮电池的关键技术分析及其研究现状

    Institute of Scientific and Technical Information of China (English)

    周红凯; 谢振宇; 王晓

    2014-01-01

    介绍了车载飞轮电池的储能和运行机理,详细分析了飞轮材料、磁悬浮技术、电动/发电机和电力电子转换装置等关键技术的国内外研究现状,探讨了车载飞轮电池的动力学特性及车载飞轮电池的发展趋势。%This paper briefly introduces the en-ergy storage and operation mechanism of the fly-wheel battery for vehicle,and analysis of the re-search status of the key technology at home and a-broad in detail,which includes flywheel material, magnetic levitation technology,motor/generator and power electronic devices.This paper also dis-cusses the development trend and the dynamics of flywheel battery for vehicle.

  20. Research of Braking Force Distribution and Energy Recovery Control Strategy of Hybrid Electric Vehicle%混合动力电动汽车制动力分配及能量回收控制策略研究

    Institute of Scientific and Technical Information of China (English)

    金宇华; 张庭芳; 刘建春

    2011-01-01

    Braking energy recovery is one of resource of HEV great advantage over traditional vehicles. Through regenerative braking, kinetic energy in the course of braking can be transformed to electricity energy into battery which can be utilized again when driving, so the vehicle energy efficiency is improved. So it's necessary to research on how to coordinate and control the assignment proportion between friction brake and regenerative brake, and try to recycle braking energy as much as possible under the precondition that brake security is ensured, and then the secondary development of regenerative braking control strategy module in simulation software ADVISOR is carried out.%制动能量回收是混合动力汽车相对于传统燃油汽车的巨大节能优势来源之一.利用再生制动,可以将制动过程中的动能转化为电能储存到电池当中,以备驱动时使用,提高整车的能量利用率.深入研究了如何协调控制摩擦制动和再生制动之间的分配比例,在保证制动稳定性前提下,尽可能多地回收制动能量,并对ADVISOR中再生制动控制策略模块进行二次开发.

  1. Research on wind cooling disperse heat of micro electric vehicle power cabin%微型纯电动汽车动力舱风冷散热研究

    Institute of Scientific and Technical Information of China (English)

    徐晓明; 赵又群

    2012-01-01

    微型纯电动汽车的进风口可以布置在多个位置,将进风口布置在微型纯电动汽车动力舱前端,研究这种进风方式的散热效率;不同进出风模式是否可以改善动力舱的散热性能也是一个值得关注的问题.研究结果表明:电池组发热量、车外环境温度及进风温度对动力舱内的温度影响较大,进风口数目及动力舱进风速度对其影响较小;当进风温度低于环境温度时,增加进风口数目和提高车速可以提高散热性能,当进风温度高于环境温度时,减少进风口数目和降低车速可以提高散热性能.上述结论为微型纯电动汽车动力舱散热方案实施提供了参考依据.%Air-inlet of micro electric vehicle can be arranged in a plurality of positions. It is worth researching whether the air-inlet arranged in the front of micro electric vehicle pow- er cabin can improve disperse heat efficiency. It is also important to choose a finer air-inlet b- air-outlet pattern to improve disperse heat efficiency. The results indicate that the tem- perature of power cabin is affected evidently by the battery heat, environment temperature and air-inlet temperature, whereas is affected less by air-outlet pattern, number and speed of the air-inlet~ when the intake air temperature is lower than the ambient temperature, in- creasing the number of air-inlet quantity and vehicle speed can improve the cooling perform- ance, and when the intake air temperature is above the ambient temperature, reducing the number of air-inlet quantity and vehicle speed can improve the cooling performance. Then the reference basis for choosing disperse heat project was provided.

  2. 基于“蝇眼”网络模糊控制的装甲车避障系统研究%Armored Vehicle Obstacle Avoidance System Research Based on“Fly's Sye”Network Fuzzy Control

    Institute of Scientific and Technical Information of China (English)

    杨英杰; 张科

    2014-01-01

    Armored car body weight,body length there such as congenital disadvantage,in the process of vehicle walking vision less than 180degrees,the body and the distance between the obstacles only by the human eye estimating,appear visual blind area,in turn and reverse often appear collision.This paper puts forward a based on the“fly's eye”network fuzzy control technology of armored vehicle obstacle avoid-ance system research,the armored car around the obstacles 360degree detection,real-time display bearing and distance,vehicle body of da-ta transmission using high stability of CAN bus technology,to realize the sensor information fusion based on neural network with fuzzy con-trol obstacle avoidance technology on armored vehicles to walk for intelligent obstacle avoidance control.In different environment of system test the obstacle avoidance method can make the obstacles bearing and distance measurement accuracy assurance in 95% and 98% above, have very strong practicability.%装甲车车身重,存在车体长宽等先天劣势,在车辆行走的过程中视野不到180度,车身与障碍物之间的距离只能通过人眼进行估测,驾驶员出现视觉盲区,在转弯与倒车时经常出现碰撞;提出一种基于“蝇眼”网络模糊控制技术的装甲车避障系统研究,对装甲车周围的障碍物进行360°的探测,实时显示方位与距离,车辆本体中的数据传输使用稳定性较高的 CAN 总线技术实现,对传感器的信息融合后使用基于神经网络模糊控制的避障技术对装甲车行走进行智能避障控制;在不同环境下的系统测试中本文的避障方法能够将障碍物的方位与距离测量准确率保证在95%与98%以上,具有很强的实用性。

  3. Research on modeling of flight vehicle design deviations%飞行器设计偏差量建模方法研究

    Institute of Scientific and Technical Information of China (English)

    高显忠; 侯中喜; 刘建霞

    2011-01-01

    It lays an important foundation of analyzing and evaluatiyng the performance and probabilistic design of a flight vehicle that the design variables deviations and modelled and fit into a probability density function ( PDF). For normal distribution limited in fitners and mixed Gamma distribution unable to be fit test data over the whole number axis, the method using mixed Gouss distribution to fit test data into arbitzazy functions was proposed after its rational demonstration,in which the parameters in Gauss mixed distribution was estimated by expectation maximization (EM) algorithm. The general procedure was designed,and the strategy utilizing prior distribution information and controlling incremental number of branches was proposed so as to reduce computational load and ensure the fita ccuracy. Some examples were given to illustrate the effectiveness of the method. Finally,the experiment data of axis angle deviation in an flight vehicle engine was taken as an example to show the feasibility of the proposed method in engineering application.%对设计变量的偏差量进行建模,拟合偏差量服从的概率密度函数,是分析评价飞行器性能和概率设计的重要基础.针对常用分布拟合能力有限,以及混合Gamma分布无法在整个数轴上对试验数据进行拟合的问题,在论证混合Gauss分布拟合任意概率密度函数合理性的基础上,提出了利用混合Gauss分布对试验数据进行拟合,并运用期望极大化算法(EM)估计混合Gauss分布中的参数.设计了通用的拟合试验数据的流程,提出利用先验分布信息的策略和递增的分支数控制策略,以减少运算量,保证拟合精度.通过实例验证了方法的有效性,并结合时某型飞行器发动机轴线偏斜角测试数据建模的问题开展了应用研究,表明该方法在工程应用中具有可行性.

  4. Current challenges in autonomous vehicle development

    Science.gov (United States)

    Connelly, J.; Hong, W. S.; Mahoney, R. B., Jr.; Sparrow, D. A.

    2006-05-01

    The field of autonomous vehicles is a rapidly growing one, with significant interest from both government and industry sectors. Autonomous vehicles represent the intersection of artificial intelligence (AI) and robotics, combining decision-making with real-time control. Autonomous vehicles are desired for use in search and rescue, urban reconnaissance, mine detonation, supply convoys, and more. The general adage is to use robots for anything dull, dirty, dangerous or dumb. While a great deal of research has been done on autonomous systems, there are only a handful of fielded examples incorporating machine autonomy beyond the level of teleoperation, especially in outdoor/complex environments. In an attempt to assess and understand the current state of the art in autonomous vehicle development, a few areas where unsolved problems remain became clear. This paper outlines those areas and provides suggestions for the focus of science and technology research. The first step in evaluating the current state of autonomous vehicle development was to develop a definition of autonomy. A number of autonomy level classification systems were reviewed. The resulting working definitions and classification schemes used by the authors are summarized in the opening sections of the paper. The remainder of the report discusses current approaches and challenges in decision-making and real-time control for autonomous vehicles. Suggested research focus areas for near-, mid-, and long-term development are also presented.

  5. Research on Application of Airport Special Vehicles Scheduling Based on Nearest Neighbors Algorithm%基于最邻近算法的机场特种车辆调度应用研究

    Institute of Scientific and Technical Information of China (English)

    殷龙; 衡红军

    2016-01-01

    window constraints according to the business of the airport refue-ling service is built in this paper. After that,the research of using the nearest neighbor algorithm on the solution of the model is given,and taking the actual flight data of a domestic airport as an example,the model is verified the effectiveness on the issue. At last,the optimum fuel filler task allocation result is obtained. Experimental results show that the algorithm can greatly reduce the service cost for special scheduling vehicles.

  6. Mobility in Turkey. Electric Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Yazgan, M. [Embassy of the Kingdom of the Netherlands, Turan Gunes Bulvari, Hollanda Caddesi, No.5,06550 Yildiz-Ankara (Turkey)

    2013-01-15

    The purpose of this report is to provide information about electric vehicles (EVs) and e-mobility as an emerging market in Turkey. EVs receive attention from the Turkish government for a number of reasons: Turkey has a strong automotive industry and needs to follow the technological developments taking place regarding intelligent vehicles and intelligent transport systems, as well as electric transportation technologies. Secondly, a considerable amount of carbon emissions from motor vehicles is of great concern in relation to climate change. EVs might be an alternative which can break the dependence of Turkey on imported fuel that has a negative influence on its current account deficit (CAD). On top of these factors, the Prime Minister of Turkey has a desire to have a 'Local Brand Vehicle' before the 100th year of the establishment of the Republic in 2023 and preferably an 'EV'. EVs are included in the strategy documents and action plans of almost all ministries and public institutions. Among all ministries, the Ministry of Science, Industry and Technology (MoSI and T) takes a leading position. It holds bi-annual meetings with stakeholders to monitor and evaluate progress about the level of actualization of the identified policies on e-mobility. MoSI and T's related institution of the Scientific and Technological Research Council of Turkey (TUBITAK) co-ordinates the R and D activities and provides generous R and D incentives. EVs have been put on sale in Turkey in 2012 and are still very limited in number. Public institutions are taking the lead by converting their vehicle fleet to EVs. EVs are also more suitable for businesses/ duties with a fixed/short route; therefore it is expected that the growth of the sector will mainly come from the vehicle fleet of the public organisations and institutions, followed by the private vehicle fleet of companies, e.g. freight companies. Although there are some on-going test drives, it is not yet proven

  7. Modeling Languages Refine Vehicle Design

    Science.gov (United States)

    2009-01-01

    Cincinnati, Ohio s TechnoSoft Inc. is a leading provider of object-oriented modeling and simulation technology used for commercial and defense applications. With funding from Small Business Innovation Research (SBIR) contracts issued by Langley Research Center, the company continued development on its adaptive modeling language, or AML, originally created for the U.S. Air Force. TechnoSoft then created what is now known as its Integrated Design and Engineering Analysis Environment, or IDEA, which can be used to design a variety of vehicles and machinery. IDEA's customers include clients in green industries, such as designers for power plant exhaust filtration systems and wind turbines.

  8. Rich Vehicle Routing Problems and Applications

    DEFF Research Database (Denmark)

    Wen, Min

    The Vehicle Routing Problem (VRP) is one of the most important and challenging optimization problems in the field of Operations Research. It was introduced by Dantzig and Ramser (1959) and defined as the problem of designing the optimal set of routes for a fleet of vehicles in order to serve...... a given set of customers. The VRP is a computationally hard combinatorial problem and has been intensively studied by numerous researchers in the last fifty years. Due to the significant economic benefit that can be achieved by optimizing the routing problems in practice, more and more attention has been...... given to various extensions of the VRP that arise in real life. These extensions are often called Rich Vehicle Routing Problems (RVRPs). In contrast to the research of classical VRP that focuses on the idealized models with unrealistic assumptions, the research of RVRPs considers those complicated...

  9. How important is vehicle safety for older consumers in the vehicle purchase process?

    Science.gov (United States)

    Koppel, Sjaan; Clark, Belinda; Hoareau, Effie; Charlton, Judith L; Newstead, Stuart V

    2013-01-01

    and their family from a crash, their traffic infringement history, and whether they had children. These findings are consistent with previous research that suggests that, though older consumers highlight the importance of safety features (i.e., seat belts, air bags, braking), they often downplay the role of safety in their vehicle purchasing process and are more likely to equate vehicle safety with the presence of specific vehicle safety features or technologies rather than the vehicle's crash safety/test results or crashworthiness. The findings from this study provide a foundation to support further research in this area that can be used by policy makers, manufacturers, and other stakeholders to better target the promotion and publicity of vehicle safety features to particular consumer groups (such as older consumers). Better targeted campaigns may help to emphasize the value of safety features and their role in reducing the risk of injury/death. If older consumers are better informed of the benefits of safety features when purchasing a vehicle, a further reduction in injuries and deaths related to motor vehicle crashes may be realized.

  10. 甲醇汽油发动机应用浅析%Analysis on Vehicle Methanol Gasoline Research of Present Situation and Prospect

    Institute of Scientific and Technical Information of China (English)

    陶巍巍; 华海宁; 包伟

    2013-01-01

    文章主要从甲醇汽油在发动机应用上的动力性、非常规排放冷启动、常规排放、毒性及使用安全性等方面与汽油发动机进行了对比分析,在此基础上介绍了目前甲醇汽油的应用现状情况及其推广前景。%Recent developments have raised increased interest on the methanol gasoline as the most promis-ing alternative energy sources for gasoline engine vehicle.This article mainly analyzes the methanol gasoline in engine application performance, irregular emissions in cold start, conventional gasoline engine emis-sions,toxicity and use safety and so on,and based on this,this paper introduces the present situation and application of methanol gasoline and its prospect of promotion.

  11. 车辆道路试验数据实时采集系统研究%Real-time data acquisition vehicle road tests Research Systems

    Institute of Scientific and Technical Information of China (English)

    刘遵勇; 党瑞宁

    2014-01-01

    This paper introduces a kind of test data acquisition and transmission system, which integrates CAN bus communication technology, GPS global positioning technology with GPRS mobile communication technology. The problems in road test are solved after applying the system to heavy-duty commercial diesel vehicle, such as: extreme environment, complex operating condition, long mileage, multifarious data and unable to acquire the test data timely and accurately. The article focuses on the method of real-time data collection in road test.%本文介绍了一种基于CAN总线通信技术、GPS全球定位技术、GPRS移动通信技术等为一体的试验数据采集传输系统,通过该系统在重型电控柴油商用车上的应用,解决了汽车道路试验中环境极端、工况复杂、里程长,数据繁杂、试验数据无法及时、准确获取等问题,重点讲述了车辆道路试验数据实时采集方法的实现。

  12. Research on power equalization using a low-loss DC-DC chopper for lithium-ion batteries in electric vehicle

    Science.gov (United States)

    Wei, Y. W.; Liu, G. T.; Xiong, S. N.; Cheng, J. Z.; Huang, Y. H.

    2017-01-01

    In the near future, electric vehicle is entirely possible to replace traditional cars due to its zero pollution, small power consumption and low noise. Lithium-ion battery, which owns lots of advantages such as lighter and larger capacity and longer life, has been widely equipped in different electric cars all over the world. One disadvantage of this energy storage device is state of charge (SOC) difference among these cells in each series branch. If equalization circuit is not allocated for series-connected batteries, its safety and lifetime are declined due to over-charge or over-discharge happened, unavoidably. In this paper, a novel modularized equalization circuit, based on DC-DC chopper, is proposed to supply zero loss in theory. The proposed circuit works as an equalizer when Lithium-ion battery pack is charging or discharging or standing idle. Theoretical analysis and control method have been finished, respectively. Simulation and small scale experiments are applied to verify its real effect.

  13. 基于车辆特征的关键帧提取方法研究%Research of the key frame extraction method based on vehicle characteristics

    Institute of Scientific and Technical Information of China (English)

    王正玉; 李勃; 张明辉; 欧玉荣

    2011-01-01

    In this paper, several types of existing key frame extraction methods are analyzed, and a new key frame extraction method is presented based on the characteristics of the vehicle itself. This method has better universality and adaptability. It is computed simply and has high exactness. It can control the quantity of the extracted key frames while avoiding redundancy. Experiment results prove that this approach has better validity in key frame extraction.%对目前存在的几类提取关键帧的方法进行了分析,并基于车辆自身特征提出一种新的关键帧提取方法。该算法具有良好的通用性和适应性,计算简单,正确率高,有效避免了冗余,并可以控制关键帧的数量。实验结果表明,该算法在提取关键帧方面具有良好的有效性。

  14. A Survey of Vehicle Routing Problem

    Directory of Open Access Journals (Sweden)

    Cao Wujun

    2017-01-01

    Full Text Available In recent years, vehicle routing problem (VRP has become an important content in logistics management research, and has been widely used in transportation system, logistics distribution system and express delivery system. In this paper, we discuss the classification of VRP, and summarize the common constraints of VRP, model algorithm and the main research results in recent years. Finally, we analyzes the future of VRP, and it is considered that the intelligent vehicle routing problem and intelligent heuristic algorithm will be an important field of future research.

  15. Vehicle usage verification system

    NARCIS (Netherlands)

    Scanlon, William G.; McQuiston, Jonathan; Cotton, Simon L.

    2012-01-01

    EN)A computer-implemented system for verifying vehicle usage comprising a server capable of communication with a plurality of clients across a communications network. Each client is provided in a respective vehicle and with a respective global positioning system (GPS) by which the client can determi

  16. Electric Vehicle Battery Challenge

    Science.gov (United States)

    Roman, Harry T.

    2014-01-01

    A serious drawback to electric vehicles [batteries only] is the idle time needed to recharge their batteries. In this challenge, students can develop ideas and concepts for battery change-out at automotive service stations. Such a capability would extend the range of electric vehicles.

  17. Vehicle Routing Problem Models

    Directory of Open Access Journals (Sweden)

    Tonči Carić

    2004-01-01

    Full Text Available The Vehicle Routing Problem cannot always be solved exactly,so that in actual application this problem is solved heuristically.The work describes the concept of several concrete VRPmodels with simplified initial conditions (all vehicles are ofequal capacity and start from a single warehouse, suitable tosolve problems in cases with up to 50 users.

  18. Motor Vehicle Safety

    Science.gov (United States)

    ... to prevent these crashes is one part of motor vehicle safety. Here are some things you can do to be safer on the road: Make sure your vehicle is safe and in working order Use car seats for children Wear your seat belt Don' ...

  19. Electric Vehicle Battery Challenge

    Science.gov (United States)

    Roman, Harry T.

    2014-01-01

    A serious drawback to electric vehicles [batteries only] is the idle time needed to recharge their batteries. In this challenge, students can develop ideas and concepts for battery change-out at automotive service stations. Such a capability would extend the range of electric vehicles.

  20. Whither electric vehicles?

    OpenAIRE

    Shukla, AK

    2002-01-01

    In the late 1890s, at the dawn of the automobile era, steam, gasoline and electric vehicles all competed to become the dominant automobile technology. By the early 1900s, the battle was over and Internal Combustion Engine Vehicles (ICEVs) were poised to become the prime movers of the twentieth century.

  1. Video surveillance of pedestrians and vehicles

    Science.gov (United States)

    Gutchess, Daniel; Ablavsky, Vitaly; Thangali, Ashwin; Sclaroff, Stan; Snorrason, Magnús

    2007-04-01

    In this paper, we focus on the problem of automated surveillance in a parking lot scenario. We call our research system VANESSA, for Video Analysis for Nighttime Surveillance and Situational Awareness. VANESSA is capable of: 1) detecting moving objects via background modeling and false motion suppression, 2) tracking and classifying pedestrians and vehicles, and 3) detecting events such as person entering or exiting a vehicle. Moving object detection utilizes a multi-stage cascading approach to identify pixels that belong to the true objects and reject any spurious motion, (e.g., due to vehicle headlights or moving foliage). Pedestrians and vehicles are tracked using a multiple hypothesis tracker coupled with a particle filter for state estimation and prediction. The space-time trajectory of each tracked object is stored in an SQL database along with sample imagery to support video forensics applications. The detection of pedestrians entering/exiting vehicles is accomplished by first estimating the three-dimensional pose and the corresponding entry and exit points of each tracked vehicle in the scene. A pedestrian activity model is then used to probabilistically assign pedestrian tracks that appear or disappear in the vicinity of these entry/exit points. We evaluate the performance of tracking and pedestrian-vehicle association on an extensive data set collected in a challenging real-world scenario.

  2. Yeager Airport Hydrogen Vehicle Test Project

    Energy Technology Data Exchange (ETDEWEB)

    Davis, Williams [West Virginia University Research Corporation, Morgantown, WV (United States)

    2015-10-01

    The scope of this project was changed during the course of the project. Phase I of the project was designed to have the National Alternative Fuels Training Consortium (NAFTC), together with its partners, manage the Hydrogen Vehicle Test Project at the Yeager Airport in conjunction with the Central West Virginia Regional Airport Authority (CWVRAA) in coordination with the United States Department of Energy National Energy Technology Laboratory (U.S. DOE NETL). This program would allow testing and evaluation of the use of hydrogen vehicles in the state of West Virginia utilizing the hydrogen fueling station at Yeager Airport. The NAFTC and CWVRAA to raise awareness and foster a greater understanding of hydrogen fuel and hydrogen-powered vehicles through a targeted utilization and outreach and education effort. After initial implementation of the project, the project added, determine the source(s) of supply for hydrogen powered vehicles that could be used for the testing. After completion of this, testing was begun at Yeager Airport. During the course of the project, the station at Yeager Airport was closed and moved to Morgantown and the West Virginia University Research Corporation. The vehicles were then moved to Morgantown and a vehicle owned by the CWVRAA was purchased to complete the project at the new location. Because of a number of issues detailed in the report for DE-FE0002994 and in this report, this project did not get to evaluate the effectiveness of the vehicles as planned.

  3. Hydrogen vehicle fueling station

    Energy Technology Data Exchange (ETDEWEB)

    Daney, D.E.; Edeskuty, F.J.; Daugherty, M.A. [Los Alamos National Lab., NM (United States)] [and others

    1995-09-01

    Hydrogen fueling stations are an essential element in the practical application of hydrogen as a vehicle fuel, and a number of issues such as safety, efficiency, design, and operating procedures can only be accurately addressed by a practical demonstration. Regardless of whether the vehicle is powered by an internal combustion engine or fuel cell, or whether the vehicle has a liquid or gaseous fuel tank, the fueling station is a critical technology which is the link between the local storage facility and the vehicle. Because most merchant hydrogen delivered in the US today (and in the near future) is in liquid form due to the overall economics of production and delivery, we believe a practical refueling station should be designed to receive liquid. Systems studies confirm this assumption for stations fueling up to about 300 vehicles. Our fueling station, aimed at refueling fleet vehicles, will receive hydrogen as a liquid and dispense it as either liquid, high pressure gas, or low pressure gas. Thus, it can refuel any of the three types of tanks proposed for hydrogen-powered vehicles -- liquid, gaseous, or hydride. The paper discusses the fueling station design. Results of a numerical model of liquid hydrogen vehicle tank filling, with emphasis on no vent filling, are presented to illustrate the usefulness of the model as a design tool. Results of our vehicle performance model illustrate our thesis that it is too early to judge what the preferred method of on-board vehicle fuel storage will be in practice -- thus our decision to accommodate all three methods.

  4. Research of Quick Damage Estimating System of Accident Vehicles Based on Cloud Technology%基于云技术的事故车辆快速定损报价系统研究和设计

    Institute of Scientific and Technical Information of China (English)

    楼荣; 陈开考; 乔文山; 盛琦

    2016-01-01

    通过对事故车辆定损业务要求的分析,结合云技术的发展现状,研究和实践了基于云技术的快速定损报价系统。该系统界面友好,操作简单,成本低。系统可通过手机移动终端进行操作,并适用于各主流品牌车型。%Through analysis on requirement of the accident vehicle damage estimating business, combined with the current development of cloud-technology, carries on the research and practice about the quick damage estimating system based on the cloud-technology. This systematic interface is friendly, operating is easy and the cost is low. It can be operated by mobile terminal, and suitable for the major brand models.

  5. A Few Questions on Flight Control System Research and Design of Near Space Vehicle%关于近空间飞行器飞行控制系统研究设计的几个问题

    Institute of Scientific and Technical Information of China (English)

    姜长生

    2015-01-01

    Several problems on the flight control system design of Near Space Vehicle ( NSV ) are discussed. Firstly, the recent developments and the importance of NSV research are introduced. Then, several important problems for the NSV flight control are discussed, including:1 ) modeling of NSV flight motion control;2 ) robustness of NSV flight attitude control;3 ) integrated coordination control between flight attitude and centre-of-gravity motion;4 ) integrated coordination control between flight and engine control;and 5 ) anti-disturbance of flight control. The corresponding view is given and methods are proposed for solution of the problems. At last, the author’s viewpoints on design principles of NSV flight control system are presented, and the significance of applying integrated coordination control idea in NSV flight control system design is pointed out.

  6. Genesis of the Lunar Landing Vehicle

    Science.gov (United States)

    Gelzer, Christian

    2009-01-01

    The author examines early research regarding return flight from a Moon landing made prior to President Kennedy's 1961 challenge to put men on the Moon before the end of the decade. Organizations involved in early research include NACA, the Flight Research Center (now Dryden) Bell Aircraft Corporation. The discussion focuses on development of a flight simulator to model the Moon's reduced gravity and development of the Lunar Landing Research Vehicle.

  7. 基于双目视觉的无人引导运输装置的研究%Research on Automated Guided Vehicle Based on Binocular Vision

    Institute of Scientific and Technical Information of China (English)

    吴年祥; 吴卫东

    2015-01-01

    针对路径单一、路径变化需重复施工,柔性和智能化程度不足的传统式无人引导运输装置,研究出基于高射频识别、磁条导向与双目视觉导航结合技术、路径规划技术、区域匹配的算法等基础上的无人引导运输装置。协助人工完成货物的登记,入库以及运输,具有精确朝向与完整定位、磁条和视觉校正的循迹和导航、货物追踪管理、智能任务分配和路径规划、目标跟踪等功能。广泛应用于机械、汽车、电子等诸多智能工厂领域,减少人力成本。%An unmanned guided transport is developed based on high frequency identification,magnetic orien-tation and navigation based on binocular vision technology,path planning technology,region matching algorithm and so on are aimed at traditional AGV(Automated Guided Vehicle)that single path,path changes need to repeat construction ,Lack of flexibility and intelligence .The AGV assit artificial complete the registration,storage and transportation of goods,with accurate orientation,and complete positioning,tracking and navigation of magnetic stripe and visual correction,cargo tracking management,smart task assignment and path planning,target tracking, and other functions.AGV is widely used in machinery,automobile,electronics and many other fields of intelligent plant reduce the manpower cost.

  8. Research on Auto Flight Path Planning Algorithm of Multiple Unmanned Air Vehicles%多无人机飞行路径自动规划算法研究

    Institute of Scientific and Technical Information of China (English)

    马传焱

    2015-01-01

    The path planning plays an important role in the reconnaissance task of unmanned air vehicle(UAV).Aiming at auto flight path planning algorithm of multi⁃UAV,this paper analyzes the key technologies of modeling and algorithm design.The algorithm uses Voronoi diagram for path planning. Based on the constructed battlefield environment V diagram, the Dijkstra algorithm in graph theory is used for initial path search and optimization.The simulation results show that this algorithm can be used to plan flight path for a typical multi⁃UAV flight task,and adapt to multiple constraint conditions.At last,it is shown that reasonable results of path planning are obtained.%路径规划对无人机完成其侦察作战任务具有重要意义。针对多无人机飞行路径自动规划算法,从模型建立和算法设计2个方面对规划过程中的关键技术进行了详细分析。算法采用构造Voronoi多边形图的方法来进行路径规划。基于构建的战场环境V图,采用图论中的Dijkstra 算法,对V图进行搜索得到初始航路并进行优化。经过分析仿真结果证明,该算法能对典型的多无人机飞行任务进行路径规划,并能满足多种约束条件,获取合理的规划结果。

  9. 基于回归森林的车载组合导航系统研究%Research on Vehicle Integrated Navigation System Based on Forest Regression

    Institute of Scientific and Technical Information of China (English)

    张树君; 马永强

    2014-01-01

    Vehicle navigation system based GPS has been widely used. But GPS has a major defect that is it can navigate depending on at least 4 satellites’ signal. To overcome this shortage of GPS, a combined system consisting of GPS and INS is utilized. INS subsystem may produce accumulated errors. In order to improve the accuracy, Kalman filter and artificial intelligence approaches have been put forward. In this study, a combined system based on forest regression is proposed. The result of this experiment illustrates that this method has a significant optimized in the positional error.%基于 GPS 的车载导航系统被广泛应用,但是 GPS 存在不可避免的缺陷,需要4颗以上的卫星信号才可以实现导航,INS/GPS组合导航可以有效的弥补这一缺陷,实现全时全地形导航。INS子系统易产生累计误差,人们已经就如何减少累计误差做了很多研究,卡尔曼滤波及其改进算法,以及近年来提出的基于人工智能的多种方法。本文提出一种基于回归森林的组合导航算法,实验结果也证明此方法在减少导航误差方面有了大幅度的优化。

  10. BOA技术在车辆感知网络中的应用研究%Applied research on BOA technology in the internet of vehicle

    Institute of Scientific and Technical Information of China (English)

    崔建明

    2012-01-01

    “车联网技术”的兴起,大量传感技术得到应用,受无线传输设备与传感器体积限制,信息只能单向传递,缺少与被感知设备间交互。提出一种通过BOA技术远程感知交通设备中部件访问的双向交互技术,配合虚拟独立地址技术可以达到部件分组独立控制。这样BOA通过CAN总线集成可以对设备整体进行全部部件监控和更多的优化操作.达到更大范围内的远程参数获取与监控。最后,通过具有BOA技术的实例证明,此种技术可行。%The rise of the internet of vehicle (IoV), a large number of sensor technology has been applied ,and because there are some limits that the wireless transmission device and the sensor size, information pass in only one-way, the lack of interaction with the be sensing equipment. It has been proposed that a two-way interactive technology for access the traffic equipment parts by the BOA remote sensing, the components grouping can be achieved independent control with the virtual independent address technology. In this way, BOA can monitor all parts in whole equipment and more optimization operating by integrated CAN-BUS, and reach for remote get 他 the parameter of the equipment and monitor it in a wider range. Finally, examples of the BOA technology show that the technical is feasible.

  11. The Research on Network Trafifc Vehicle Based on DSRC%基于DSRC交通路口的车联网的研究

    Institute of Scientific and Technical Information of China (English)

    吴志红; 胡力兴; 朱元

    2015-01-01

    首先阐述了车联网的一些概念,车联网是一种物联网,是在道路交通网络中的具体应用,并从车联网的三个层次,感知层、网络层和云平台进行阐述。接着介绍了车载专用短程通讯技术(Dedicated Short Range Communication, DSRC)中的IEEE802.11p协议和IEEE1609标准,其中IEEE802.11p是从IEEE802.11协议扩充来的,IEEE1609标准为车载网络提供了有效的存取方式。最后针对交通路口的事故频发的问题,提出了一种基于DSRC技术的智能交通路口模型的车联网解决方案。%This article describes some concepts of the internet of vehicles (IOV), which is a kind of the internet of things (IOT) and is a concrete application of IOT in the network of road trafifc. It discusses three layers of IOV (perception layer, network layer and the cloud platform). Then it focuses on IEEE802.11p protocol and IEEE1609 standard in DSRC, the IEEE802.11p protocol extends from IEEE802.11 protocol and the IEEE1609 standard provides effective access method for vehicular network. Aiming at the problems of the frequent accidents at trafifc intersection, this article puts forward a kind of IOV solution to intelligent trafifc intersection model.

  12. 众泰电动汽车公共租赁点的设计研究%Research on Design of Zhongtai Electric Vehicle Public Rental Point

    Institute of Scientific and Technical Information of China (English)

    俞海红

    2013-01-01

    汽车租赁业务已在我国发展得如火如荼,而电动汽车环保节能污染少,如果能够成为杭州城市公共交通工具,可以自由地供市民及外来游客租用,将对改善城市空气质量和缓解交通压力有重要作用。本文在与众泰汽车合作开发项目的基础上,以浙江经贸职业技术学院租赁点为例,探讨了杭州众泰电动汽车公共租赁点的硬件规划和所配套的公共租赁服务内容,以供众泰汽车开展电动汽车公共租赁项目借鉴。%As the car rental business in China has developed fast,and electric automobile has advantage of environmental protection and energy saving,if electric automobile becomes Hangzhou city public transportation which can be rented for the public and foreign visitors,it must improve city air quality and have an important role to alleviate traffic pressure. Based on the cooperation of development project with Zotye Auto,the article takes ZheJiang Economic & Trade Polytechnic rental point as an example, discusses the design of hardware planning of Hangzhou Zhongtai electric vehicle public rental point ,and the service content for supporting it,which can provide the experience For Zotye Auto developing the electric automobile public rental project.

  13. Research on Armored Vehicle Fire Control System Performance Test Method%装甲车辆火控系统性能测试方法研究

    Institute of Scientific and Technical Information of China (English)

    张华; 魏洁英

    2016-01-01

    为了解决装甲车辆火控系统性能测试精度低、测试方法复杂、耗时长的问题,本文提出了一种装甲火控系统性能测试的自动化测试系统。该测试系统是一种针对新型总线化火控系统定量性能指标的测试系统,实现了从激励信号的注入、信号的采集到信号处理整个过程的自动化。通过使用该系统可以提高火控系统性能测试的精度,同时缩短测试时间,节约人力和物力资源,给系统测试提供了很大的方便,具有一定的实用性价值。%In order to make up the disadvantage of armored vehicle fire control system performance test as being of low precision, being complicate test system focuses on new bus fire control system quantitative performance index, and realizes the automation covering from excitation signal input, signal collection to signal processing. It promotes the precision of fire control system performance test, saves the testing time, and also saves both human and material resources, bringing huge convenience to the system performance test.

  14. Research on Control System of Deformable Unmanned Aerial Vehicle(D-UAV)%折叠翼飞行机器人(D-UAV)控制系统研究

    Institute of Scientific and Technical Information of China (English)

    樊永超; 陆永华; 王代武

    2015-01-01

    In view of the low altitude defense system,the Deformable Unmanned Aerial Vehicle (D-UAV) of defense phalanx is designed,and the principle with actions is introduced,then designing the D-UAV operation control system.This paper adopts the traditional 2.4G 9 channel FS-TH9X remote controls and 8 channel FS-R8B wireless receiver to implement part of D-UAV control function.The whole control system is built with single chip microcomputer,gyroscope , wireless and various implementation module structures.Adopting fuzzy control algorithm,experiment shows that the control system is stable and reliable,and successfully applied to the D-UAV.%针对低空防御系统,设计了防御方阵中的折叠翼飞行机器人(D-UAV),介绍了D-UAV的工作与实现原理,设计了D-UAV运行控制系统。采用2.4G通讯频率9通道FS-TH9X遥控器、8通道FS-R8B无线接收器实现了D-UAV部分控制功能,配合单片机、陀螺仪、无线以及各种执行模块搭建了整个控制系统。采用模糊控制算法,试验表明该控制系统稳定可靠,并成功应用于D-UAV。

  15. Application research of vehicle management system based on VxWorks%VxWorks在飞行器管理系统中的应用研究

    Institute of Scientific and Technical Information of China (English)

    汤小明; 李引娟; 程农

    2011-01-01

    提出了一种操作系统分级调度模型,该模型能够将多个传统子系统综合到一个应用平台中,并能保证各子系统在时间上相互独立.结合实时操作系统VxWorks,论述了该模型的最佳实践方法辅助时钟法,并对VxWorks的启动、存储管理,中断与异常管理等进行了详细论述.采用该模型在飞行器管理系统中将飞行控制系统、导航系统、数传模块以及任务管理系统等传统的子系统进行了综合,并给出了在某系统中的具体应用和性能评估,实验结果表明了该系统具有高性能、增量开发与部署的能力.%A hierarchical scheduling model of operating system is proposed, which make a number of traditional subsystems integrated to one application platform and isolated in temporal domain. Based on the real-time operating system VxWorks, the best practical method,the auxiliary clock scheduling algorithm is provided. The start-up, memory management, interrupt and exception management in VxWorks is depicted as well. And then the flight control system, navigation system, data transmission system and mission management system are integrated into one platform of vehicle management system by this hierarchical scheduling model. In the end, the performance evaluation is conducted, which indicates this project has features of high performance, incremental development and deployment.

  16. 关于重型商用车总装工艺规划的研究%Research about Assembly process planning on heavy commercial vehicle

    Institute of Scientific and Technical Information of China (English)

    郭俊; 张明福

    2016-01-01

    This paper analyzes the production program, workshop area, investment budget and new technology of heavy commercial vehicle assembly shop;At the same time considering the diversity of product structure of heavy truck,the most economical and reasonable technical scheme and advanced process engineering are adopted,Our company has successfully built a flexible production line of 80 cars a day.According to the structure and characteristics of 40 different car models of the company, the process planning, equipment utilization, process innovation and so on are described in detail in this paper.%文章对重型商用车总装车间的生产纲领、车间面积、投资预算、新工艺的运用等全面的分析;同时考虑重卡产品结构变化的多样性,采用最经济、最合理的技术方案和先进的工艺技术,为我们公司成功建设了一条单班80辆整车柔性化生产线。根据公司近40种不同车型的结构及特点,文章对总装车间中所涉及到的工艺规划、设备运用、工艺创新运用等进行了详细的阐述。

  17. TARDEC Ground Vehicle Robotics: Vehicle Dynamic Characterization and Research

    Science.gov (United States)

    2015-09-01

    reason why most consumer automobiles come from the factory in an understeer configuration, so that if something goes wrong in a maneuver, the car will...This has a bit to do with suspension design, which isn’t something I want to dive into, so I’ll keep the explanations brief and google can fill... car loses traction and skids out. This test is essential in characterizing the UNCLASSIFIED UNCLASSIFIED steady state cornering capabilities of

  18. The 1991 natural gas vehicle challenge: Developing dedicated natural gas vehicle technology

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, R.; Rimkus, W. [Argonne National Lab., IL (United States); Davies, J. [General Motors of Canada Ltd., Toronto, ON (Canada); Zammit, M. [AC Rochester, NY (United States); Patterson, P. [USDOE, Washington, DC (United States)

    1992-02-01

    An engineering research and design competition to develop and demonstrate dedicated natural gas-powered light-duty trucks, the Natural Gas Vehicle (NGV) Challenge, was held June 6--11, 1191, in Oklahoma. Sponsored by the US Department of Energy (DOE), Energy, Mines, and Resources -- Canada (EMR), the Society of Automative Engineers (SAE), and General Motors Corporation (GM), the competition consisted of rigorous vehicle testing of exhaust emissions, fuel economy, performance parameters, and vehicle design. Using Sierra 2500 pickup trucks donated by GM, 24 teams of college and university engineers from the US and Canada participated in the event. A gasoline-powered control testing as a reference vehicle. This paper discusses the results of the event, summarizes the technologies employed, and makes observations on the state of natural gas vehicle technology.

  19. The 1991 natural gas vehicle challenge: Developing dedicated natural gas vehicle technology

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, R.; Rimkus, W. (Argonne National Lab., IL (United States)); Davies, J. (General Motors of Canada Ltd., Toronto, ON (Canada)); Zammit, M. (AC Rochester, NY (United States)); Patterson, P. (USDOE, Washington, DC (United States))

    1992-01-01

    An engineering research and design competition to develop and demonstrate dedicated natural gas-powered light-duty trucks, the Natural Gas Vehicle (NGV) Challenge, was held June 6--11, 1191, in Oklahoma. Sponsored by the US Department of Energy (DOE), Energy, Mines, and Resources -- Canada (EMR), the Society of Automative Engineers (SAE), and General Motors Corporation (GM), the competition consisted of rigorous vehicle testing of exhaust emissions, fuel economy, performance parameters, and vehicle design. Using Sierra 2500 pickup trucks donated by GM, 24 teams of college and university engineers from the US and Canada participated in the event. A gasoline-powered control testing as a reference vehicle. This paper discusses the results of the event, summarizes the technologies employed, and makes observations on the state of natural gas vehicle technology.

  20. Modular Energy Storage System for Hydrogen Fuel Cell Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, Janice [Magna International, Rochester Mills, MI (United States)

    2010-08-27

    The objective of the project is to develop technologies, specifically power electronics, energy storage electronics and controls that provide efficient and effective energy management between electrically powered devices in alternative energy vehicles plug-in electric vehicles, hybrid vehicles, range extended vehicles, and hydrogen-based fuel cell vehicles. The in-depth research into the complex interactions between the lower and higher voltage systems from data obtained via modeling, bench testing and instrumented vehicle data will allow an optimum system to be developed from a performance, cost, weight and size perspective. The subsystems are designed for modularity so that they may be used with different propulsion and energy delivery systems. This approach will allow expansion into new alternative energy vehicle markets.

  1. A high-resolution vehicle emission inventory for China

    Science.gov (United States)

    Zheng, B.; Zhang, Q.; He, K.; Huo, H.; Yao, Z.; Wang, X.

    2012-12-01

    Developing high resolution emission inventory is an essential task for air quality modeling and management. However, current vehicle emission inventories in China are usually developed at provincial level and then allocated to grids based on various spatial surrogates, which is difficult to get high spatial resolution. In this work, we developed a new approach to construct a high-resolution vehicle emission inventory for China. First, vehicle population at county level were estimated by using the relationship between per-capita GDP and vehicle ownership. Then the Weather Research and Forecasting (WRF) model were used to drive the International Vehicle Emission (IVE) model to get monthly emission factors for each county. Finally, vehicle emissions by county were allocated to grids with 5-km horizon resolution by using high-resolution road network data. This work provides a better understanding of spatial representation of vehicle emissions in China and can benefit both air quality modeling and management with improved spatial accuracy.

  2. Plug in electric vehicles in smart grids energy management

    CERN Document Server

    Rajakaruna, Sumedha; Ghosh, Arindam

    2014-01-01

    This book highlights the cutting-edge research on energy management within smart grids with significant deployment of Plug-in Electric Vehicles (PEV). These vehicles not only can be a significant electrical power consumer during Grid to Vehicle (G2V) charging mode, they can also be smartly utilized as a controlled source of electrical power when they are used in Vehicle to Grid (V2G) operating mode. Electricity Price, Time of Use Tariffs, Quality of Service, Social Welfare as well as electrical parameters of the network are all different criteria considered by the researchers when developing

  3. Vehicles under electricity. Result booklet; Autos unter Strom. Ergebnisbroschuere

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-09-15

    The booklet under consideration reports on the environmental relief of electric-driven vehicles by means of the research project OPTUM 'Potentials of environmental relief of electric driven vehicles - Integrated analysis of vehicle usage and energy economy'. Experts from the Institute for Applied Ecology (Freiburg, Federal Republic of Germany) and the Institute for Social-Ecological Research (Frankfurt (Main), Federal Republic of Germany) are devoted to the following issues: (1) What is the acceptance for electric-driven vehicles?; (2) What is their future market potential?; (3) What are the advantages of electromobility with respect to the climate?; (4) Are their supply shortages concerning major raw materials?.

  4. Innovative control systems for tracked vehicle platforms

    CERN Document Server

    2014-01-01

     This book has been motivated by an urgent need for designing and implementation of innovative control algorithms and systems for tracked vehicles. Nowadays the unmanned vehicles are becoming more and more common. Therefore there is a need for innovative mechanical constructions capable of adapting to various applications regardless the ground, air or water/underwater environment. There are multiple various activities connected with tracked vehicles. They can be distributed among three main groups: design and control algorithms, sensoric and vision based in-formation, construction and testing mechanical parts of unmanned vehicles. Scientists and researchers involved in mechanics, control algorithms, image processing, computer vision, data fusion, or IC will find this book useful.

  5. Structural Weight Estimation for Launch Vehicles

    Science.gov (United States)

    Cerro, Jeff; Martinovic, Zoran; Su, Philip; Eldred, Lloyd

    2002-01-01

    This paper describes some of the work in progress to develop automated structural weight estimation procedures within the Vehicle Analysis Branch (VAB) of the NASA Langley Research Center. One task of the VAB is to perform system studies at the conceptual and early preliminary design stages on launch vehicles and in-space transportation systems. Some examples of these studies for Earth to Orbit (ETO) systems are the Future Space Transportation System [1], Orbit On Demand Vehicle [2], Venture Star [3], and the Personnel Rescue Vehicle[4]. Structural weight calculation for launch vehicle studies can exist on several levels of fidelity. Typically historically based weight equations are used in a vehicle sizing program. Many of the studies in the vehicle analysis branch have been enhanced in terms of structural weight fraction prediction by utilizing some level of off-line structural analysis to incorporate material property, load intensity, and configuration effects which may not be captured by the historical weight equations. Modification of Mass Estimating Relationships (MER's) to assess design and technology impacts on vehicle performance are necessary to prioritize design and technology development decisions. Modern CAD/CAE software, ever increasing computational power and platform independent computer programming languages such as JAVA provide new means to create greater depth of analysis tools which can be included into the conceptual design phase of launch vehicle development. Commercial framework computing environments provide easy to program techniques which coordinate and implement the flow of data in a distributed heterogeneous computing environment. It is the intent of this paper to present a process in development at NASA LaRC for enhanced structural weight estimation using this state of the art computational power.

  6. Passive Earth Entry Vehicle Landing Test

    Science.gov (United States)

    Kellas, Sotiris

    2017-01-01

    Two full-scale passive Earth Entry Vehicles (EEV) with realistic structure, surrogate sample container, and surrogate Thermal Protection System (TPS) were built at NASA Langley Research Center (LaRC) and tested at the Utah Test and Training Range (UTTR). The main test objective was to demonstrate structural integrity and investigate possible impact response deviations of the realistic vehicle as compared to rigid penetrometer responses. With the exception of the surrogate TPS and minor structural differences in the back shell construction, the two test vehicles were identical in geometry and both utilized the Integrated Composite Stiffener Structure (ICoSS) structural concept in the forward shell. The ICoSS concept is a lightweight and highly adaptable composite concept developed at NASA LaRC specifically for entry vehicle TPS carrier structures. The instrumented test vehicles were released from a helicopter approximately 400 m above ground. The drop height was selected such that at least 98% of the vehicles terminal velocity would be achieved. While drop tests of spherical penetrometers and a low fidelity aerodynamic EEV model were conducted at UTTR in 1998 and 2000, this was the first time a passive EEV with flight-like structure, surrogate TPS, and sample container was tested at UTTR for the purpose of complete structural system validation. Test results showed that at a landing vertical speed of approximately 30 m/s, the test vehicle maintained structural integrity and enough rigidity to penetrate the sandy clay surface thus attenuating the landing load, as measured at the vehicle CG, to less than 600 g. This measured deceleration was found to be in family with rigid penetrometer test data from the 1998 and 2000 test campaigns. Design implications of vehicle structure/soil interaction with respect to sample container and sample survivability are briefly discussed.

  7. Cumulative Vehicle Routing Problems

    OpenAIRE

    Kara, &#;mdat; Kara, Bahar Yeti&#;; Yeti&#;, M. Kadri

    2008-01-01

    This paper proposes a new objective function and corresponding formulations for the vehicle routing problem. The new cost function defined as the product of the distance of the arc and the flow on that arc. We call a vehicle routing problem with this new objective function as the Cumulative Vehicle Routing Problem (CumVRP). Integer programming formulations with O(n2) binary variables and O(n2) constraints are developed for both collection and delivery cases. We show that the CumVRP is a gener...

  8. Blast resistant vehicle seat

    Energy Technology Data Exchange (ETDEWEB)

    Ripley, Edward B

    2013-02-12

    Disclosed are various seats for vehicles particularly military vehicles that are susceptible to attack by road-bed explosive devices such as land mines or improvised explosive devices. The seats often have rigid seat shells and may include rigid bracing for rigidly securing the seat to the chassis of the vehicle. Typically embodiments include channels and particulate media such as sand disposed in the channels. A gas distribution system is generally employed to pump a gas through the channels and in some embodiments the gas is provided at a pressure sufficient to fluidize the particulate media when an occupant is sitting on the seat.

  9. 美国高超声速飞行器转捩装置设计研究综述%Review of Design and Research for Transition Devices of USA Hypersonic Flight Vehicle

    Institute of Scientific and Technical Information of China (English)

    战培国

    2015-01-01

    吸气式高超声速飞行器前体边界层转捩研究是美国高超声速研究计划的重要内容之一。简述美国吸气式高超声速飞行器(X-43)转捩装置设计的背景,阐述转捩装置的设计策略和位置确定原则,介绍美国转捩试验风洞的选择依据和主要风洞,归纳美国风洞试验采用的主要测试技术和研究方法,分析“钻石”型和“斜坡”型转捩装置构型的风洞试验结果。%Research of air-breathing hypersonic lfight vehicle’s forebody boundary layer transition is one of the important content of USA hypersonic research plan. The design background of air-breathing hypersonic flight vehicle(X-43) transition devices was sketched, design strategies and position determination principle of transition devices were stated, the choosing basis and main wind tunnel of USA transition test tunnel were introduced, the main test technologies and research mehtods were concluded, finally analyzed the wind tunnel test results of diamond shape and ramp shape transition devices.

  10. Research on intelligent vehicles based on servo information acquisition system%基于随动式信息采集系统的智能车研究

    Institute of Scientific and Technical Information of China (English)

    李登峰; 宋广发; 赵彩霞

    2011-01-01

    为改善固定前瞻式信息采集系统模型车赛道检测范围有限、检测精度较低的缺点,提高智能模型车的行驶速度和稳定性,提出了基于随动式激光传感器采集系统的智能模型车设计及控制算法,通过将模型车的信息采集前瞻板安装在可以旋转的平台上,采用比例微分算法控制旋转平台,最终根据前瞻板的转动角度可以精确计算出赛道位置.测试结果表明,随动激光前瞻与固定前瞻相比增加了横向检测范围,提高了检测精度,减小了高速行驶状态下丢失赛道信息的概率,使转向控制更为平滑、精确.使用随动式激光前瞻系统使模型车平均行驶速度提高了0.6m/s.%To deal with the problem of the low detection accuracy and the small detection range of intelligent vehicles with the fixed detection system, a servo detection system with laser sensors and a new control strategy are proposed. In the design of the system, the detection system is fixed on a servo platform, and finally the track information can be calculated by the angle between the platform and the body. Moreover, the PD strategy is adopted to control the servo platform. Our result shows that the detection range is extended, the detection accuracy is improved, and the possibility of losing the track information is reduced in the high speed mode. Besides, the average speed is increase by 0.6m/s with continuous and smooth steering.

  11. 商用车后处理系统尿素结晶问题研究%Commercial vehicle post-processing system of urea crystallization problem research

    Institute of Scientific and Technical Information of China (English)

    苏长春

    2016-01-01

    文章根据商用车排气后处理系统的结构布置和工作原理,逐层分类对尿素结晶问题进行分析梳理,通过理论分析、软件模拟以及试验对比,并结合工作中遇到的实际案例,较全面的研究了尿素结晶可能出现的零部件及出现的原因,并针对不同的原因提出了解决措施。分析证明,通过合理的选择重型卡车排气后处理系统的零部件类型,优化各零件安装角度、尺寸、外形结构,增加保温措施提高排气温度,优化发动机控制策略标定等措施,可有效提高后处理系统尿素溶液反应效率,降低尿素结晶风险,从而避免整车出现动力不足、排放超标等问题。%According to truck exhaust after treatment system structure and working principle of classification of layer-by-layer analysis of urea Crystal issues, through theoretical analysis, software simulations and experiments, and combined with the actual case work, more comprehensive studies of urea crystals may appear parts and the cause of, and proposes solutions for different reasons. Analysis shows that, through the rational selection of heavy duty truck exhaust after treatment system component type, optimize the structure of parts mounting angle, dimension, shape, increased insulation measures to increase the exhaust temperature, optimum calibration of engine control strategy and other measures, can effectively improve the handling system of urea solution after the reaction efficiency, reduce the risk of urea crystals, so as to avoid underpowered vehicle, excessive emissions and other issues.

  12. Intelligent Vehicle Electrical Power Supply System with Central Coordinated Protection

    Institute of Scientific and Technical Information of China (English)

    YANG Diange; KONG Weiwei; LI Bing; LIAN Xiaomin

    2016-01-01

    The current research of vehicle electrical power supply system mainly focuses on electric vehicles (EV) and hybrid electric vehicles (HEV). The vehicle electrical power supply system used in traditional fuel vehicles is rather simple and imperfect;electrical/electronic devices (EEDs) applied in vehicles are usually directly connected with the vehicle’s battery. With increasing numbers of EEDs being applied in traditional fuel vehicles, vehicle electrical power supply systems should be optimized and improved so that they can work more safely and more effectively. In this paper, a new vehicle electrical power supply system for traditional fuel vehicles, which accounts for all electrical/electronic devices and complex work conditions, is proposed based on a smart electrical/electronic device (SEED) system. Working as an independent intelligent electrical power supply network, the proposed system is isolated from the electrical control module and communication network, and access to the vehicle system is made through a bus interface. This results in a clean controller power supply with no electromagnetic interference. A new practical battery state of charge (SoC) estimation method is also proposed to achieve more accurate SoC estimation for lead-acid batteries in traditional fuel vehicles so that the intelligent power system can monitor the status of the battery for an over-current state in each power channel. Optimized protection methods are also used to ensure power supply safety. Experiments and tests on a traditional fuel vehicle are performed, and the results reveal that the battery SoC is calculated quickly and sufficiently accurately for battery over-discharge protection. Over-current protection is achieved, and the entire vehicle’s power utilization is optimized. For traditional fuel vehicles, the proposed vehicle electrical power supply system is comprehensive and has a unified system architecture, enhancing system reliability and security.

  13. The Inter-Life Project: Researching the Potential of Art, Design and Virtual Worlds as a Vehicle for Assisting Young People with Key Life Changes and Transitions

    Science.gov (United States)

    Lally, Victor; Sclater, Madeleine

    2013-01-01

    Careers work in the twenty-first century faces a key challenge in terms of digital technologies: to evaluate their potential for careers work in challenging settings. Given the rapidity of developments, technologies require evaluation in research innovations and naturalistic settings. Virtual worlds offer potential for careers and guidance work,…

  14. Research on Resistance Test Method of Vehicle Drive System%基于台架的整车传动系阻力梯度测试方法研究

    Institute of Scientific and Technical Information of China (English)

    张宏超; 朱玉刚; 付永刚; 张有禄; 刘双喜; 高海洋

    2016-01-01

    汽车燃油经济性越来越成为消费者所关注的问题,同时,为解决环境污染和能源安全问题,我国已发布第四阶段乘用车燃料消耗量限值法规,整车经济性成为法规约束指标.为了向整车经济性优化提供研发数据支撑,基于四驱动力总成试验平台,在动力总成台架试验室内还原了整车正常行驶状态,通过阶梯式分布测试方法,研究了车辆动力总成和传动系中各个动力传动单元在动力输出过程中的阻力分布状况,建立了整车传动系阻力梯度测试方法.研究表明,该方法可以量化各部件对于传动系自身阻力的影响,为解决传动系中效率短板提供了数据与测试方法支持.%Automobile fuel economy became an issue consumers concerned and China has published the fourth stage passenger car fuel consumption limits for environmental issues and energy security. In order to provide data to optimize the vehicle economy performance, this paper simulated the normal vehicle driving state in 4WD powertrain bench lab and studied the resistance distribution in powertrain system and drive line with cascade test methods. The research shows that this method can quantify the self-resistance contri-butions of transfer unit in driveline system and provide the data and testing support for vehicle economy op-timization.

  15. Vehicle Dynamics and Control

    CERN Document Server

    Rajamani, Rajesh

    2012-01-01

    Vehicle Dynamics and Control provides a comprehensive coverage of vehicle control systems and the dynamic models used in the development of these control systems. The control system applications covered in the book include cruise control, adaptive cruise control, ABS, automated lane keeping, automated highway systems, yaw stability control, engine control, passive, active and semi-active suspensions, tire-road friction coefficient estimation, rollover prevention, and hybrid electric vehicle. In developing the dynamic model for each application, an effort is made to both keep the model simple enough for control system design but at the same time rich enough to capture the essential features of the dynamics. A special effort has been made to explain the several different tire models commonly used in literature and to interpret them physically. In the second edition of the book, chapters on roll dynamics, rollover prevention and hybrid electric vehicles have been added, and the chapter on electronic stability co...

  16. Hybrid vehicle control

    Energy Technology Data Exchange (ETDEWEB)

    Shallvari, Iva; Velnati, Sashidhar; DeGroot, Kenneth P.

    2015-07-28

    A method and apparatus for heating a catalytic converter's catalyst to an efficient operating temperature in a hybrid electric vehicle when the vehicle is in a charge limited mode such as e.g., the charge depleting mode or when the vehicle's high voltage battery is otherwise charge limited. The method and apparatus determine whether a high voltage battery of the vehicle is incapable of accepting a first amount of charge associated with a first procedure to warm-up the catalyst. If it is determined that the high voltage battery is incapable of accepting the first amount of charge, a second procedure with an acceptable amount of charge is performed to warm-up the catalyst.

  17. Hybrid vehicle control

    Science.gov (United States)

    Shallvari, Iva; Velnati, Sashidhar; DeGroot, Kenneth P.

    2015-07-28

    A method and apparatus for heating a catalytic converter's catalyst to an efficient operating temperature in a hybrid electric vehicle when the vehicle is in a charge limited mode such as e.g., the charge depleting mode or when the vehicle's high voltage battery is otherwise charge limited. The method and apparatus determine whether a high voltage battery of the vehicle is incapable of accepting a first amount of charge associated with a first procedure to warm-up the catalyst. If it is determined that the high voltage battery is incapable of accepting the first amount of charge, a second procedure with an acceptable amount of charge is performed to warm-up the catalyst.

  18. Aerodynamics of Small Vehicles

    Science.gov (United States)

    Mueller, Thomas J.

    In this review we describe the aerodynamic problems that must be addressed in order to design a successful small aerial vehicle. The effects of Reynolds number and aspect ratio (AR) on the design and performance of fixed-wing vehicles are described. The boundary-layer behavior on airfoils is especially important in the design of vehicles in this flight regime. The results of a number of experimental boundary-layer studies, including the influence of laminar separation bubbles, are discussed. Several examples of small unmanned aerial vehicles (UAVs) in this regime are described. Also, a brief survey of analytical models for oscillating and flapping-wing propulsion is presented. These range from the earliest examples where quasi-steady, attached flow is assumed, to those that account for the unsteady shed vortex wake as well as flow separation and aeroelastic behavior of a flapping wing. Experiments that complemented the analysis and led to the design of a successful ornithopter are also described.

  19. Hydraulic Hybrid Vehicles

    Science.gov (United States)

    EPA and the United Parcel Service (UPS) have developed a hydraulic hybrid delivery vehicle to explore and demonstrate the environmental benefits of the hydraulic hybrid for urban pick-up and delivery fleets.

  20. Abandoned vehicles REMINDER

    CERN Document Server

    Relations with the Host States Service

    2004-01-01

    The services in charge of managing the CERN site have recently noted an increase in the number of abandoned vehicles. This poses a risk from the point of view of safety and security and, on the eve of several important events in honour of CERN's fiftieth anniversary, is detrimental to the Organization's image. Owners of vehicles that have been left immobile for some time on the CERN site, including on the external car park by the flags, are therefore invited to contact the Reception and Access Control Service (service-parking-longterm@cern.ch) before 1st October 2004 and, where appropriate, move their vehicle to a designated long-term parking area. After this date, any vehicle whose owner has failed to respond to this request and which is without a number plate, has been stationary for several weeks or is out of service, may be impounded at the owner's risk and expense. Relations with the Host States Service Tel. 72848

  1. Abandoned vehicles - Reminder

    CERN Document Server

    Relations with the Host States Service

    2004-01-01

    The services in charge of managing the CERN site have recently noted an increase in the number of abandoned vehicles. This poses a risk from the point of view of safety and security and, on the eve of several important events in honour of CERN's fiftieth anniversary, is detrimental to the Organization's image. Owners of vehicles that have been left immobile for some time on the CERN site, including on the external car park by the flags, are therefore invited to contact the Reception and Access Control Service (service-parking-longterm@cern.ch) before 1st October 2004 and, where appropriate, move their vehicle to a designated long-term parking area. After this date, any vehicle whose owner has failed to respond to this request and which is without a number plate, has been stationary for several weeks or is out of service, may be impounded at the owner's risk and expense. Relations with the Host States Service Tel. 72848

  2. Abandonned vehicles - REMINDER

    CERN Document Server

    Relations with the Host States Service

    2004-01-01

    The services in charge of managing the CERN site have recently noted an increase in the number of abandoned vehicles. This poses a risk from the point of view of safety and security and, on the eve of several important events in honour of CERN's fiftieth anniversary, is detrimental to the Organization's image. Owners of vehicles that have been left immobile for some time on the CERN site, including on the external car park by the flags, are therefore invited to contact the Reception and Access Control Service (service-parking-longterm@cern.ch) before 1st October 2004 and, where appropriate, move their vehicle to a designated long-term parking area. After this date, any vehicle whose owner has failed to respond to this request and which is without a number plate, has been stationary for several weeks or is out of service, may be impounded at the owner's risk and expense. Relations with the Host States Service Tel. 72848

  3. 电动汽车用动力电池荷电状态估算方法研究综述%The Overview of Research of Power Battery SOC Estimation Methods Use for Electric Vehicle

    Institute of Scientific and Technical Information of China (English)

    欧阳剑; 李迪; 柳俊城

    2016-01-01

    The significance of power battery state of charge estimation is to provide the remaining capacity of the battery to facilitate the driver to understand the vehicle's continued driving mileage, so as to improve the efficiency of the use of battery energy, improve vehicle performance. This paper presents a review of the current methods for estimating the state of power battery state of charge. The method of discharge test, open circuit voltage method, support vector regression and system filtering method are introduced in detail. In the end, the research conclusion is drawn, and the best method is reviewed, and the development of the power battery state of charge estimation method is provided.%动力电池荷电状态估算的意义在于提供电池剩余容量方便驾驶员及时了解汽车的续驶里程,从而提高电池能量的使用效率,提高电动车的整车性能。综述性地介绍了目前常用的动力电池荷电状态估算的方法,详细介绍了放电试验法、开路电压法、支持向量回归法和系统滤波方法等7种方法;最后列表对比各种方法之间的特点。最后得出研究结论,评述了应用中最佳的方法,同时对未来动力电池荷电状态估算方法的发展提供必要的说明。

  4. Research on Modeling of Dynamic Traction Characteristics and Test System of Urban Rail Vehicles%城市轨道车辆牵引动态特性建模与实验系统研究

    Institute of Scientific and Technical Information of China (English)

    宋瑞刚; 杨俭; 方宇

    2012-01-01

    The calculation model of dynamic traction characteristics of the urban railway vehicle was established and analyzed. On that basis, the test system of dynamic traction characteristics based on virtual instrument technology was proposed and the method for execution of the traction and load simulation system under low-power conditions was specified. The test results of the platform and the measured data of real cars running on the Shanghai Metro Line 2 were compared. It is found that the test data of dynamic traction characteristics and electric braking characteristics of urban railway vehicles agree with measured data and this is of great value to research of the traction control strategy and electric braking operation.%在建立和分析城市轨道车辆牵引动态特性计算模型的基础上,提出一种基于虚拟仪器技术的牵引动态特性测试实验系统,并具体阐述低功率条件下牵引负载模拟系统实现的方法.实验结果与上海地铁二号线的实车测试数据进行了对比分析,表明该实验平台对于城市轨道车辆牵引动态特性及电制动特性的测试与实车测试结果较吻合,对牵引运行控制策略及制动方面的研究具有重要价值.

  5. Ground Vehicle Robotics Presentation

    Science.gov (United States)

    2012-08-14

    Mr. Jim Parker Associate Director Ground Vehicle Robotics Distribution Statement A. Approved for public release Report Documentation Page...Briefing 3. DATES COVERED 01-07-2012 to 01-08-2012 4. TITLE AND SUBTITLE Ground Vehicle Robotics Presentation 5a. CONTRACT NUMBER 5b. GRANT...ABSTRACT Provide Transition-Ready, Cost-Effective, and Innovative Robotics and Control System Solutions for Manned, Optionally-Manned, and Unmanned

  6. HYBRID VEHICLE CONTROL SYSTEM

    Directory of Open Access Journals (Sweden)

    V. Dvadnenko

    2016-06-01

    Full Text Available The hybrid vehicle control system includes a start–stop system for an internal combustion engine. The system works in a hybrid mode and normal vehicle operation. To simplify the start–stop system, there were user new possibilities of a hybrid car, which appeared after the conversion. Results of the circuit design of the proposed system of basic blocks are analyzed.

  7. Vehicle Based Vector Sensor

    Science.gov (United States)

    2015-09-28

    300001 1 of 16 VEHICLE-BASED VECTOR SENSOR STATEMENT OF GOVERNMENT INTEREST [0001] The invention described herein may be manufactured and...unmanned underwater vehicle that can function as an acoustic vector sensor . (2) Description of the Prior Art [0004] It is known that a propagating...mechanics. An acoustic vector sensor measures the particle motion via an accelerometer and combines Attorney Docket No. 300001 2 of 16 the

  8. Progress in vehicle aerodynamics and thermal management. Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Wiedemann, Jochen (ed.) [Stuttgart Univ. (DE). Inst. fuer Kraftfahrwesen und Verbrennungsmotoren (IVK); Forschungsinstitut fuer Kraftfahrwesen und Fahrzeugmotoren (FKFS), Stuttgart (Germany)

    2010-07-01

    Vehicle aerodynamics and thermal management are subjects of increasing importance for automotive development especially regarding the necessity to reduce the energy consumption of the vehicle as well as the need to improve ist comfort. This book is intended for engineers, physicists, and mathematicians who work on vehicle aerodynamics. It is also addressed to people in research organizations, at universities and agencies. It may be of interest to technical journalists and to students. (orig.)

  9. Use of a thermophotovoltaic generator in a hybrid electric vehicle

    Science.gov (United States)

    Morrison, Orion; Seal, Michael; West, Edward; Connelly, William

    1999-03-01

    Viking 29 is the World's first thermophotovoltaic (TPV) powered automobile. The prototype was funded by the Department of Energy and designed and built by students and faculty at the Vehicle Research Institute (VRI) at Western Washington University. Viking 29 is a series hybrid electric vehicle that utilizes TPV generators to charge its battery pack. Acceleration, speed, and handling compare to modern high performance sports cars, while emissions are cleaner than current internal combustion engine vehicles.

  10. Survey of Modular Military Vehicles: Benefits and Burdens

    Science.gov (United States)

    2016-01-01

    Benefit or Burden Depends on whether front vehicle is fully armored FCS Phase I SAIC Burden Overdesign; parasitic hull weight Families of Vehicles SAIC...variants, parasitic structure, and possible extra sensors, powertrains, communication devices, etc., if the modules are capable of independent...where she conducted research on environmental issues with vehicles and manufacturing plants . Dr. Dasch holds a PhD from the University of Maryland

  11. Implementasi Algoritma Clarke And Wright’s Savings Dalam Menyelesaikan Capacitated Vehicle Routing Problem (CVRP)

    OpenAIRE

    Damanik, Donna

    2016-01-01

    Model to choose vehicle route is known as Vehicle Routing Problem (VRP). VRP is related to optimal routing problem that involve more than one vehicle of each capacity to serve costumer’s demand. Capacitated Vehicle Routing Problem is one of VRP form which each of vehicle has finite capacity. Solution in this research use Clarke and Wright’s Savings Algorithm. This algorithm may get a route depand to vehicle capacity and customer’s demand. Data that use in this research is di...

  12. Electric/Hybrid Vehicle Simulation

    Science.gov (United States)

    Slusser, R. A.; Chapman, C. P.; Brennand, J. P.

    1985-01-01

    ELVEC computer program provides vehicle designer with simulation tool for detailed studies of electric and hybrid vehicle performance and cost. ELVEC simulates performance of user-specified electric or hybrid vehicle under user specified driving schedule profile or operating schedule. ELVEC performs vehicle design and life cycle cost analysis.

  13. Towards E(lectric)-urban freight: First promising steps in the electric vehicle revolution

    NARCIS (Netherlands)

    Duin, J.H.R. van; Tavasszy, L.A.; Quak, H.J.

    2013-01-01

    Innovative logistics service providers are currently looking for possibilities to introduce electric vehicles for goods distribution. As electrical vehicles still suffer from a limited operation range, the logistical process faces important challenges. In this research we advise on the composition

  14. Natural gas vehicles : Status, barriers, and opportunities.

    Energy Technology Data Exchange (ETDEWEB)

    Rood Werpy, M.; Santini, D.; Burnham, A.; Mintz, M.; Energy Systems

    2010-11-29

    In the United States, recent shale gas discoveries have generated renewed interest in using natural gas as a vehicular fuel, primarily in fleet applications, while outside the United States, natural gas vehicle use has expanded significantly in the past decade. In this report for the U.S. Department of Energy's Clean Cities Program - a public-private partnership that advances the energy, economic, and environmental security of the U.S. by supporting local decisions that reduce petroleum use in the transportation sector - we have examined the state of natural gas vehicle technology, current market status, energy and environmental benefits, implications regarding advancements in European natural gas vehicle technologies, research and development efforts, and current market barriers and opportunities for greater market penetration. The authors contend that commercial intracity trucks are a prime area for advancement of this fuel. Therefore, we examined an aggressive future market penetration of natural gas heavy-duty vehicles that could be seen as a long-term goal. Under this scenario using Energy Information Administration projections and GREET life-cycle modeling of U.S. on-road heavy-duty use, natural gas vehicles would reduce petroleum consumption by approximately 1.2 million barrels of oil per day, while another 400,000 barrels of oil per day reduction could be achieved with significant use of natural gas off-road vehicles. This scenario would reduce daily oil consumption in the United States by about 8%.

  15. 提高YJP-Q系列车用液体加热器热效率的试验研究%The Experimental Research on Improving Thermal Efficiency of the YJP-Q Series Vehicle Liquid Heater

    Institute of Scientific and Technical Information of China (English)

    郭彬; 江楠; 毛华永; 郭烽; 郭玉龙

    2012-01-01

    To improve the thermal efficiency of vehicle liuid heater, a double-water-chamber heat exchanger and a two-sided gas-fired heat exchanger were designed. By assessment research, it is found both structures significantly improve the thermal efficiency compared to the original machine,and the exhaust gas temperature has dropped significantly. Also the influence of combustion gas backflow cover location and water flow to heater thermal efficiency were researched.%为提高车用液体加热器的热效率,设计了双水腔换热器和双面燃气加热换热器。经台架试验,二者的热效率比原机有大幅提高,而排气温度大幅下降;还对燃烧室燃气回流罩位置及水流量对加热器热效率的影响进行了试验研究。

  16. VEHICLE THEFT ALERT SYSTEM USING GSM

    Directory of Open Access Journals (Sweden)

    LAXMI

    2013-05-01

    Full Text Available In this technical world where technology is growing up day by day and scientific researches are presenting a new era of discoveries, we need security in all the areas. As theft activities are increasing around, we have need of more security in Automobiles/Vehicles. Today automobile industry is a major industry of the world and the vehicles need to be secured otherwise they will be packed gifts for the criminals given by our own hands. The main aim of this paper is to use wireless technology to intimate the owner of the vehicle about each and every unauthorized attempt of entry to his/her vehicle. The auto-generated Short Message Service by system is used to give information to the owner’s cell phone. And one more advantage of this project is that a back Short Message Service can be send by vehicle’s owner which will disable the ignition of the vehicle system and vehicle will be stopped. If system is active and if any unauthorized person tries to start the vehicle, the microcontroller used insystem gets an interrupt through a switch which is connected to the security system. Instantly microcontroller commands the Global System for Mobile modem to send an auto-generated message. The owner receives the Short Message Service alert in the form of some written text which is predefined in the system. If he is not sure about the jumper, owner can send a back message to the Global System for Mobile modem to ‘stop’. The Global System for Mobile modem which is interfaced to the microcontroller receives the message, according to the output of Global System for Mobile modem, micro controller disables the ignition, and it will result in stopping of the vehicle. Advancement to this system is that we can transmit auto-generated Multimedia Message Service instead of Short Message Service by using smart phone.

  17. Aerodynamic Characterization of a Modern Launch Vehicle

    Science.gov (United States)

    Hall, Robert M.; Holland, Scott D.; Blevins, John A.

    2011-01-01

    A modern launch vehicle is by necessity an extremely integrated design. The accurate characterization of its aerodynamic characteristics is essential to determine design loads, to design flight control laws, and to establish performance. The NASA Ares Aerodynamics Panel has been responsible for technical planning, execution, and vetting of the aerodynamic characterization of the Ares I vehicle. An aerodynamics team supporting the Panel consists of wind tunnel engineers, computational engineers, database engineers, and other analysts that address topics such as uncertainty quantification. The team resides at three NASA centers: Langley Research Center, Marshall Space Flight Center, and Ames Research Center. The Panel has developed strategies to synergistically combine both the wind tunnel efforts and the computational efforts with the goal of validating the computations. Selected examples highlight key flow physics and, where possible, the fidelity of the comparisons between wind tunnel results and the computations. Lessons learned summarize what has been gleaned during the project and can be useful for other vehicle development projects.

  18. Unmanned Aerial Vehicle - A Tool for Acquiring Spatial Data for Research and Commercial Purposes. New Course in the Geography and Cartography Curriculum in Higher Education

    Science.gov (United States)

    Jeziorska, J.

    2014-04-01

    This paper describes the syllabus for the innovative course "Unmanned aerial observations of Terrain" introduced to the curriculum by the Department of Geoinformatics and Cartography of the University of Wroclaw (Poland). It indicates the objectives of the new subject, its didactic purpose, methods used in the teaching process, specifications of teaching materials, and the knowledge and skills that students are expected to acquire. Finally, it presents the content of the course and description of lesson units. The subject will be obligatory for graduate students majoring in Geography, who are participants in the Geoinformatics and Cartography Master's program. Thirty-eight hours in a summer semester has been earmarked for the course. That includes 30 hours of instructor-guided laboratory and fieldtrip work, and 8 hours of individual work. The course aims to prepare future geographers to conduct a multi-step process that includes defining the purpose of using UAV in light of the chosen research problem, preparation of the mission, flight execution; geoprocessing of acquired aerial imagery; generation of cartomertic final products, and analysis of outcomes in order to answer the initially asked research question. This comprehensive approach will allow students, future experts in the field of geoinformatics and cartography, to gain the skills needed to acquire spatial data using an UAV, process them, and apply the results of their analysis in practice.

  19. FY2014 Vehicle and Systems Simulation and Testing Annual Progress Report

    Energy Technology Data Exchange (ETDEWEB)

    None

    2015-03-01

    The Vehicle and Systems Simulation and Testing research and development (R&D) subprogram within the DOE Vehicle Technologies Office (VTO) provides support and guidance for many cutting-edge automotive technologies under development. Research focuses on addressing critical barriers to advancing light-, medium-, and heavy-duty vehicle systems to help maximize the number of electric miles driven and increase the energy efficiency of transportation vehicles.

  20. Natural Environmental Service Support to NASA Vehicle, Technology, and Sensor Development Programs

    Science.gov (United States)

    1993-01-01

    The research performed under this contract involved definition of the natural environmental parameters affecting the design, development, and operation of space and launch vehicles. The Universities Space Research Association (USRA) provided the manpower and resources to accomplish the following tasks: defining environmental parameters critical for design, development, and operation of launch vehicles; defining environmental forecasts required to assure optimal utilization of launch vehicles; and defining orbital environments of operation and developing models on environmental parameters affecting launch vehicle operations.

  1. Safer Vehicles for People and the Planet

    Energy Technology Data Exchange (ETDEWEB)

    Wenzel, Thomas P; Wenzel, Thomas P; Ross, Marc

    2008-03-01

    Motor vehicles contribute to climate change and petroleum dependence. Improving their fuel economy by making them lighter need not compromise safety. The cars and trucks plying America's roads and highways generate roughly 20 percent of the nation's total emissions of carbon dioxide, a pollutant that is, of course, of increasing concern because of its influence on climate. Motor vehicles also account for most of our country's dependence on imported petroleum, the price of which has recently skyrocketed to near-record levels. So policymakers would welcome the many benefits that would accrue from lessening the amount of fuel consumed in this way. Yet lawmakers have not significantly tightened new vehicle fuel-economy standards since they were first enacted three decades ago. Since then, manufacturers have, for the most part, used advances in automotive technology, ones that could have diminished fuel consumption, to boost performance and increase vehicle weight. In addition, the growth in popularity of pickups, sport utility vehicles (SUVs) and minivans--and the large amounts of gas they typically guzzle--has resulted in the average vehicle using the same amount of fuel per mile as it did 20 years ago. One of the historical impediments to imposing tougher fuel-economy standards has been the long-standing worry that reducing the mass of a car or truck to help meet these requirements would make it more dangerous to its occupants in a crash. People often justify this concern in terms of 'simple physics', noting, for example, that, all else being equal, in a head-on collision, the lighter vehicle is the more strongly decelerated, an argument that continues to sway regulators, legislators and many in the general public. We have spent the past several years examining the research underlying this position--and some recent work challenging it. We have also conducted our own analyses and come to the conclusion that the claim that lighter vehicles are

  2. ELECTROMAGNETIC BIOSPHERE POLLUTION BY MOTOR TRANSPORT (VEHICLES, ELECTRIC VEHICLES, HYBRID VEHICLES

    Directory of Open Access Journals (Sweden)

    S. Selivanov

    2009-01-01

    Full Text Available The physics of the electromagnetic field is considered. The analysis of electromagnetic radiation on the human-being, the origin of which is the vehicle the electric vehicle, the hybrid vehicle is being considered. The monitoring of electromagnetic radiation of vehicles is carried out.

  3. Traffic Information Unit, Traffic Information System, Vehicle Management System, Vehicle, and Method of Controlling a Vehicle

    NARCIS (Netherlands)

    Papp, Z.; Doodeman, G.J.N.; Nelisse, M.W.; Sijs, J.; Theeuwes, J.A.C.; Driessen, B.J.F.

    2010-01-01

    A traffic information unit (MD1, MD2, MD3) according to the invention comprises a facility (MI) for tracking vehicle state information of individual vehicles present at a traffic infrastructure and a facility (T) for transmitting said vehicle state information to a vehicle (70B, 70E). A traffic

  4. Vehicle motion-state-estimation using distributed sensing

    NARCIS (Netherlands)

    Sijs, J.; Papp, Z.; Bosch, P.P.J. van den

    2008-01-01

    Knowing the position and speed of the vehicles on the road network in real-time is one of the major challenges that vehicle control and traffic management applications are facing. Wireless sensor networks received significant attention in the last decade and successful research put them in the foref

  5. Dedicated auxiliary power units for Hybrid Electric Vehicles

    NARCIS (Netherlands)

    Mourad, S.; Weijer, C.J.T. van de

    1998-01-01

    The use of a dedicated auxiliary power unit is essential to utilize the potential that hybrid vehicles offer for efficient and ultra-clean transportation. An example of a hybrid project at the TNO Road-Vehicles Research Institute shows the development and the results of a dedicated auxiliary power

  6. Trajectories and Maneuvers of Surrounding Vehicles with Panoramic Camera Arrays

    DEFF Research Database (Denmark)

    Dueholm, Jacob Velling; Kristoffersen, Miklas Strøm; Satzoda, Ravi K.

    2016-01-01

    Vision-based research for intelligent vehicles have traditionally focused on specific regions around a vehicle, such as a front looking camera for, e.g., lane estimation. Traffic scenes are complex and vital information could be lost in unobserved regions. This paper proposes a framework that uses...

  7. Dedicated auxiliary power units for Hybrid Electric Vehicles

    NARCIS (Netherlands)

    Mourad, S.; Weijer, C.J.T. van de

    1998-01-01

    The use of a dedicated auxiliary power unit is essential to utilize the potential that hybrid vehicles offer for efficient and ultra-clean transportation. An example of a hybrid project at the TNO Road-Vehicles Research Institute shows the development and the results of a dedicated auxiliary power u

  8. Distributed Propulsion Vehicles

    Science.gov (United States)

    Kim, Hyun Dae

    2010-01-01

    Since the introduction of large jet-powered transport aircraft, the majority of these vehicles have been designed by placing thrust-generating engines either under the wings or on the fuselage to minimize aerodynamic interactions on the vehicle operation. However, advances in computational and experimental tools along with new technologies in materials, structures, and aircraft controls, etc. are enabling a high degree of integration of the airframe and propulsion system in aircraft design. The National Aeronautics and Space Administration (NASA) has been investigating a number of revolutionary distributed propulsion vehicle concepts to increase aircraft performance. The concept of distributed propulsion is to fully integrate a propulsion system within an airframe such that the aircraft takes full synergistic benefits of coupling of airframe aerodynamics and the propulsion thrust stream by distributing thrust using many propulsors on the airframe. Some of the concepts are based on the use of distributed jet flaps, distributed small multiple engines, gas-driven multi-fans, mechanically driven multifans, cross-flow fans, and electric fans driven by turboelectric generators. This paper describes some early concepts of the distributed propulsion vehicles and the current turboelectric distributed propulsion (TeDP) vehicle concepts being studied under the NASA s Subsonic Fixed Wing (SFW) Project to drastically reduce aircraft-related fuel burn, emissions, and noise by the year 2030 to 2035.

  9. VEHICLES LICENSED IN SWITZERLAND

    CERN Multimedia

    Service des Relations avec les Pays-Hôtes

    2000-01-01

    1.\tVehicle licensinga)\tTime limitsVehicles must have a Swiss registration document and Swiss number plates: -\tif the owner has been residing in Switzerland for more than one year without a break of more than three consecutive months and has been using it for more than one month on Swiss territory, or -\tif the vehicle itself has been on Swiss territory for more than one year without a break of more than three consecutive months. b)\tTechnical details Vehicles belonging to non-Swiss members of the personnel who hold a carte de légitimation issued by the Swiss Federal Department of Foreign Affairs (hereinafter referred to as 'DFAE') and who were not permanently resident in Switzerland before taking up their appointment may be licensed in Switzerland with virtually no restrictions provided that their owner produces: -\tthe vehicle registration document and number plates of the country in which the car was previously registered, or -\ta manufacturer's certi...

  10. Methylotroph cloning vehicle

    Science.gov (United States)

    Hanson, Richard S.; Allen, Larry N.

    1989-04-25

    A cloning vehicle comprising: a replication determinant effective for replicating the vehicle in a non-C.sub.1 -utilizing host and in a C.sub.1 -utilizing host; DNA effective to allow the vehicle to be mobilized from the non-C.sub.1 -utilizing host to the C.sub.1 -utilizing host; DNA providing resistance to two antibiotics to which the wild-type C.sub.1 -utilizing host is susceptible, each of the antibiotic resistance markers having a recognition site for a restriction endonuclease; a cos site; and a means for preventing replication in the C.sub.1 -utilizing host. The vehicle is used for complementation mapping as follows. DNA comprising a gene from the C.sub.1 -utilizing organism is inserted at the restriction nuclease recognition site, inactivating the antibiotic resistance marker at that site. The vehicle can then be used to form a cosmid structure to infect the non-C.sub.1 -utilizing (e.g., E. coli) host, and then conjugated with a selected C.sub.1 -utilizing mutant. Resistance to the other antibiotic by the mutant is a marker of the conjugation. Other phenotypical changes in the mutant, e.g., loss of an auxotrophic trait, is attributed to the C.sub.1 gene. The vector is also used to inactivate genes whose protein products catalyze side reactions that divert compounds from a biosynthetic pathway to a desired product, thereby producing an organism that makes the desired product in higher yields.

  11. Modeling of Combined Phenomena Affecting an AUV Stealth Vehicle

    Directory of Open Access Journals (Sweden)

    Miroslaw Gerigk

    2016-12-01

    Full Text Available In the paper some results of research connected with modeling the basic stealth characteristics of an AUV vehicle are presented. First of all a general approach to design of the stealth AUV autonomous underwater vehicles under consideration is introduced. Then the AUV stealth vehicle concept is briefly described. Next a method of modeling of the stealth characteristics is briefly described. As an example of the stealth characteristics investigations some results of modeling the boundary layer and wake are presented. Some remarks regarding the behavior of the AUV stealth vehicle in the submerged conditions are given. The final conclusions are presented.

  12. Lithium Battery Power Delivers Electric Vehicles to Market

    Science.gov (United States)

    2008-01-01

    Hybrid Technologies Inc., a manufacturer and marketer of lithium-ion battery electric vehicles, based in Las Vegas, Nevada, and with research and manufacturing facilities in Mooresville, North Carolina, entered into a Space Act Agreement with Kennedy Space Center to determine the utility of lithium-powered fleet vehicles. NASA contributed engineering expertise for the car's advanced battery management system and tested a fleet of zero-emission vehicles on the Kennedy campus. Hybrid Technologies now offers a series of purpose-built lithium electric vehicles dubbed the LiV series, aimed at the urban and commuter environments.

  13. Measures for increasing passive safety in commercial vehicles: findings from European Research Programs = Massnahmen zur Steigerung der passiven Sicherheit von Nutzfahrzeugen : Erkenntnisse aus europäischen Forschungsprogrammen (Fortsetzung)

    NARCIS (Netherlands)

    Coo, P.J.A. de; Langwieder, K.; Gwehenberger, J.

    2003-01-01

    The ever increasing ties between European countries on the basis of a common market have long made passive safety in commercial vehicles a Europe-wide issue. Important, harmonized technical stipulations for commercial vehicles are in force within the European Union in the form of EEC directives, and

  14. Measurement-Based Vehicle Load Model for Urban Expressway Bridges

    Directory of Open Access Journals (Sweden)

    Bin Chen

    2014-01-01

    Full Text Available Significant changes in vehicle loads have occurred in China due to the development of the automobile industry and transportation within the past two decades, particularly the rapid increase in traffic flow and the large-scale emergence of heavy trucks. However, research into vehicle loadings on urban bridges is not well developed. In this study, based on traffic flow data collected using a weigh-in-motion system installed on an expressway in an urban logistics zone, we analyzed the traffic flow, vehicle types, and gross vehicle weight (GVW features and developed models for the vehicle load and fatigue load. According to the axle space, axle types, and axle number, the trucks in the traffic flow were classified into 10 representative vehicle types. The probability distribution of the GVW was fitted to a three-class mixed log-normal distribution. Using the improved Gumbel method, we determined the extreme value distribution of the vehicle loadings in the purpose reference period and assessed the vehicle loadings of urban bridges. In addition, using the equivalent damage theory, six equivalent vehicle models were established according to the measurements of the axle weight and axle space, thereby obtaining a simplified model of fatigue vehicle loadings on urban expressway bridges.

  15. Research on the test way and evaluation indexes of the vehicle's steering stability%汽车操纵稳定性的试验方法和评价指标研究

    Institute of Scientific and Technical Information of China (English)

    龙佳庆

    2015-01-01

    The vehicle's steering stability is one of the most importance performance to the vehicle safety, this paper studied on the local and the foreign test about the vehicle's steering stability, summarized the classical and practical test way and evaluation indexes of the vehicle's steering stability, it has guiding significance to the vehicle's production and improvement.%汽车的操纵稳定性是保障汽车安全驾驶的重要性能之一,文章针对国内外各种汽车在操纵稳定性方面的试验进行研究,总结了典型的、可操作性高的汽车操纵稳定性试验方法和评价指标,该试验方法和评价指标对汽车的制造与性能改进具有重要的指导意义.

  16. Electric vehicle station equipment for grid-integrated vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Kempton, Willett; Kiamilev, Fouad; McGee, Rodney; Waite, Nick

    2017-09-05

    Methods, systems, and apparatus transferring power between the grid and an electric vehicle are disclosed. The apparatus may include at least one vehicle communication port for interfacing with electric vehicle equipment (EVE) and a processor coupled to the at least one vehicle communication port to establish communication with the EVE, receive EVE attributes from the EVE, and transmit electric vehicle station equipment (EVSE) attributes to the EVE. Power may be transferred between the grid and the electric vehicle by maintaining EVSE attributes, establishing communication with the EVE, and transmitting the EVSE maintained attributes to the EVE.

  17. Robust Vehicle and Traffic Information Extraction for Highway Surveillance

    Directory of Open Access Journals (Sweden)

    C.-C. Jay Kuo

    2005-08-01

    Full Text Available A robust vision-based traffic monitoring system for vehicle and traffic information extraction is developed in this research. It is challenging to maintain detection robustness at all time for a highway surveillance system. There are three major problems in detecting and tracking a vehicle: (1 the moving cast shadow effect, (2 the occlusion effect, and (3 nighttime detection. For moving cast shadow elimination, a 2D joint vehicle-shadow model is employed. For occlusion detection, a multiple-camera system is used to detect occlusion so as to extract the exact location of each vehicle. For vehicle nighttime detection, a rear-view monitoring technique is proposed to maintain tracking and detection accuracy. Furthermore, we propose a method to improve the accuracy of background extraction, which usually serves as the first step in any vehicle detection processing. Experimental results are given to demonstrate that the proposed techniques are effective and efficient for vision-based highway surveillance.

  18. Control of AWD System for Vehicle Performance and Safety

    Directory of Open Access Journals (Sweden)

    Jung Hojin

    2016-01-01

    Full Text Available AWD (All-Wheel Drive system transfers drive force to all wheels so that it can help vehicle escape low mu surface or climb hill more conveniently. Recently, AWD system for on road vehicle has become popular to improve vehicle driving performance. However, there has not been enough research of applying AWD system for vehicle stability especially for lateral movement. Compared with ESC (Electronic Stability Control, AWD system does not cause any inconveniences to the driver because it controls vehicle only by distributing front and rear drive torque, without using brake. By allowing slipping/locking of wet clutch inside the transfer case, AWD system can distribute different amount of torque between front and rear axle. This paper introduces modelling of AWD system and suggests the control of AWD system based on peak slip ratio and slip angle at which tyre saturates. Carsim based vehicle simulation results of AWD controller is presented.

  19. ERGONOMIC DESIGN AND EVALUATION OF COMMERCIAL MOTOR VEHICLES

    Directory of Open Access Journals (Sweden)

    Peter JENČEK

    2013-12-01

    Full Text Available The number and consequences of traffic accidents and work accidents in road transport represent a burden for individuals and society, as well as a substantial economic burden for transport companies, while also affecting their competitiveness. Research in the area of transport and road vehicle ergonomics can contribute to ensuring conditions for a more secure and efficient operation of commercial road vehicles, thereby reducing the risk of road accidents. The safety of vehicle operation and road transport depends in large part on good comportment between ergonomic vehicle design and human capabilities and limitations. Eventual ergonomic incongruity between these elements may have negative safety implications. The article presents an approach to ergonomic design of commercial road vehicles and their ergonomic evaluation, which occurs in two stages, the design of the vehicle and its exploitation.

  20. N2O emission of HD vehicles

    NARCIS (Netherlands)

    Riemersma, I.J.; Jordaan, K.; Oonk, J.

    2003-01-01

    N2O is known to be a greenhouse gas with a high global warming potential, approximately 296 times higher than that of CO2 [11]. In road vehicles N2O is mostly formed by reactions in the exhaust catalyst. The IPCC (Intergovernmental Panel on Climate Changes) uses emission factors from research perfor

  1. Operator Informational Needs for Multiple Autonomous Small Vehicles

    Science.gov (United States)

    Trujillo, Anna C.; Fan, Henry; Cross, Charles D.; Hempley, Lucas E.; Cichella, Venanzio; Puig-Navarro, Javier; Mehdi, Syed Bilal

    2015-01-01

    With the anticipated explosion of small unmanned aerial vehicles, it is highly likely that operators will be controlling fleets of autonomous vehicles. To fulfill the promise of autonomy, vehicle operators will not be concerned with manual control of the vehicle; instead, they will deal with the overall mission. Furthermore, the one operator to many vehicles is becoming a constant meme with various industries including package delivery, search and rescue, and utility companies. In order for an operator to concurrently control several vehicles, his station must look and behave very differently than the current ground control station instantiations. Furthermore, the vehicle will have to be much more autonomous, especially during non-normal operations, in order to accommodate the knowledge deficit or the information overload of the operator in charge of several vehicles. The expected usage increase of small drones requires presenting the operational information generated by a fleet of heterogeneous autonomous agents to an operator. NASA Langley Research Center's Autonomy Incubator has brought together researchers in various disciplines including controls, trajectory planning, systems engineering, and human factors to develop an integrated system to study autonomy issues. The initial human factors effort is focusing on mission displays that would give an operator the overall status of all autonomous agents involved in the current mission. This paper will discuss the specifics of the mission displays for operators controlling several vehicles.

  2. Research on the Measurement of Vehicle Steering Torque Based on SAW Principle%基于SAW原理汽车转向扭矩测量的研究

    Institute of Scientific and Technical Information of China (English)

    李志鹏; 李晓英

    2016-01-01

    According to the faults including susceptible to noise,short service life,complex structure and the diffi-culty of power supply of Electric power steering system[1],based on surface acoustic wave principle to measure the Steering torque,that can realize the EPS System of light-duty and digital further. Based on COMSOL software power-ful physical analysis,the main shaft and piezoelectric substrate have got a theory and simulation research,and make statistics and analysis on the results of simulation based on Matlab software,the validation of the proposed scheme can be implemented according that.%针对市场上已有的电动助力转向EPS(Electric Steering System)扭矩测量装置存在的易受噪声干扰、寿命较短、构造复杂且供电困难等缺点[1],提出基于声表面波SAW(Surface Acoustic Wave)原理对转向扭矩进行测量的方案,能够进一步实现EPS系统扭矩测量装置的轻型化和数字化.基于COMSOL软件强大的物理分析功能,对测量方案中关键的主轴和压电基片进行理论和仿真研究,并且基于Matlab软件对仿真结果进行统计和分析,验证了该方案的可实施性.

  3. Optimizing Low Temperature Diesel Combustion (LTC-D) "FreedomCAR and Vehicle Technologies Program Solicitation for University Research and Graduate Automotice Technology Education (GATE) Centers of Excellence"

    Energy Technology Data Exchange (ETDEWEB)

    Rolf Reitz; P. Farrell; D. Foster; J. Ghandhi; C. Rutland; S. Sanders

    2009-07-31

    The engine industry is currently facing severe emissions mandates. Pollutant emissions from mobile sources are a major source of concern. For example, US EPA mandates require emissions of particulate and nitrogen oxides (NOx) from heavy-duty diesel engine exhaust to drop at least 90 percent between 1998 and 2010. Effective analysis of the combustion process is required to guide the selection of technologies for future development since exhaust after-treatment solutions are not currently available that can meet the required emission reduction goals. The goal of this project is to develop methods to optimize and control Low Temperature Combustion Diesel technologies (LTC-D) that offers the potential of nearly eliminating engine NOx and particulate emissions at reduced cost over traditional methods by controlling pollutant emissions in-cylinder. The work was divided into 5 Tasks, featuring experimental and modeling components: 1.) Fundamental understanding of LTC-D and advanced model development, 2.) Experimental investigation of LTC-D combustion control concepts, 3.) Application of detailed models for optimization of LTC-D combustion and emissions, 4.) Impact of heat transfer and spray impingement on LTC-D combustion, and 5.) Transient engine control with mixed-mode combustion. As described in the final report (December 2008), outcomes from the research included providing guidelines to the engine and energy industries for achieving optimal low temperature combustion operation through using advanced fuel injection strategies, and the potential to extend low temperature operation through manipulation of fuel characteristics. In addition, recommendations were made for improved combustion chamber geometries that are matched to injection sprays and that minimize wall fuel films. The role of fuel-air mixing, fuel characteristics, fuel spray/wall impingement and heat transfer on LTC-D engine control were revealed. Methods were proposed for transient engine operation during

  4. Hybrid electric vehicles TOPTEC

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-06-21

    This one-day TOPTEC session began with an overview of hybrid electric vehicle technology. Updates were given on alternative types of energy storage, APU control for low emissions, simulation programs, and industry and government activities. The keynote speech was about battery technology, a key element to the success of hybrids. The TOPEC concluded with a panel discussion on the mission of hybrid electric vehicles, with a perspective from industry and government experts from United States and Canada on their view of the role of this technology.

  5. Algorithms for vehicle navigation

    OpenAIRE

    Storandt, Sabine

    2012-01-01

    Nowadays, navigation systems are integral parts of most cars. They allow the user to drive to a preselected destination on the shortest or quickest path by giving turn-by-turn directions. To fulfil this task the navigation system must be aware of the current position of the vehicle at any time, and has to compute the optimal route to the destination on that basis. Both of these subproblems have to be solved frequently, because the navigation system must react immediately if the vehicle leaves...

  6. Trends in Hydrogen Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Hoevenaars, A.J.; Weeda, M. [ECN Hydrogen and Clean Fossil Fuels, Petten (Netherlands)

    2009-09-15

    This report intends to provide an update of the latest developments that have recently occurred within car industry within the field of Hydrogen powered fuel cell vehicles (FCVs) to date, October 2009. In attempts to provide a clear and logical overview, the report starts with an overview of the OEMs (Original Equipment Manufacturers) that are actually active within the Hydrogen vehicle business, and provides an overview of the intensity of FCV activity per OEM. This overview shows that there is a pool of distinctively most active OEMs, and that others have tried to create exposure for themselves, but have not seriously been involved in in-house technology development in support of FCV manufacturing. Furthermore, some manufacturers chose a different path when it comes to using hydrogen for vehicle propulsion and use Hydrogen gas as a fuel for a conventional Internal Combustion Engine (ICE). In the field of FCVs, Most FCV activities are displayed by Honda, Daimler, Opel/GM, Hyundai/Kia, Toyota, Nissan and Ford. Volkswagen has given less priority to FCV development and has not been profiling itself as a very Hydrogen-prone OEM. Mazda and BMW chose to put their efforts in the development of Hydrogen fuelled ICE vehicles. Also Ford has put efforts in Hydrogen fuelled ICE vehicles. After the active OEMs are mapped, an overview is given on how active they have been in terms of cars produced. It appeared difficult to come up with reliable estimations on the basis of numbers available for public. The sum of vehicles produced by all OEMs together was estimated on about 515 vehicles. This estimation however was much lower than the figures published by Fuel Cell Today (FCT). FCT projects accumulated vehicles shipped in 2009 around 1100 units, the double of the numbers found for this study. Communication with FCT learned us that FCT has access to confidential information from the OEMs. Especially the Asian OEMs do not provide transparency when it comes to FCVs shipped, however

  7. Affordable Vehicle Avionics Overview

    Science.gov (United States)

    Cockrell, James J.

    2015-01-01

    Public and private launch vehicle developers are reducing the cost of propulsion for small commercial launchers, but conventional high-performance, high-reliability avionics remain the disproportionately high cost driver for launch. AVA technology performs as well or better than conventional launch vehicle avionics, but with a fraction of the recurring costs. AVA enables small launch providers to offer affordable rides to LEO to nano-satellites as primary payloads meaning, small payloads can afford to specify their own launch and orbit parameters

  8. Handbook of unmanned aerial vehicles

    CERN Document Server

    Vachtsevanos, George

    2015-01-01

    The Handbook of Unmanned Aerial Vehicles is a reference text for the academic and research communities, industry, manufacturers, users, practitioners, Federal Government, Federal and State Agencies, the private sector, as well as all organizations that are and will be using unmanned aircraft in a wide spectrum of applications. The Handbook covers all aspects of UAVs, from design to logistics and ethical issues. It is also targeting the young investigator, the future inventor and entrepreneur by providing an overview and detailed information of the state-of-the-art as well as useful new concepts that may lead to innovative research. The contents of the Handbook include material that addresses the needs and ‘know how’ of all of the above sectors targeting a very diverse audience. The Handbook offers a unique and comprehensive treatise of everything one needs to know about unmanned aircrafts, from conception to operation, from technologies to business activities, users, OEMs, reference sources, conferences, ...

  9. Research on Multi Stage Decision to Update the Vehicle Logistics Enterprises Based on the Maximum Benefit%基于最大收益的物流企业配送车辆更新多阶段决策研究

    Institute of Scientific and Technical Information of China (English)

    吴玉海; 朱敏捷

    2015-01-01

    物流企业经常碰到配送车辆陈旧或部分车辆损坏需要更新的问题,物流企业配送车辆的更新将影响着企业资金成本问题,只有降低成本才是最有效的提高利润的方法,从而实现企业最大收益。文中基于最大收益原理对物流企业配送车辆的收入和使用费用进行权衡,进行车辆更新多阶段决策研究。%Logistics enterprises often encounter delivery vehicles or vehicle damage need to update the old part of the vehicle logistics enterprises,the update will affect the cost of capital,only to reduce costs is the most effective way to improve profits,so as to realize the maximum benefits of the enterprise.In this paper,the income and cost of using the maximum profit principle of vehicle logistics enterprises based on the trade-off of vehicle,multi stage decision research.

  10. 适合中国道路的车用催化器快速老化循环研究%Research on Rapid Aging Cycle of Vehicle Catalytic Converter for Chinese Road Conditions

    Institute of Scientific and Technical Information of China (English)

    业红玲

    2013-01-01

    The thermal aging mechanism of catalytic converter was first analyzed and researched ,the design idea of bench rap-id aging cycle for specific conditions was put forward ,and the bench rapid aging cycle for Chinese road conditions was devel-oped .The results show that the aging for each real vehicle can be predicted by modifying some parameters in the basic shape of developed aging cycle and adjusting the aging time .%首先对催化剂热老化原理进行了理论研究与分析,提出针对具体车用催化器使用条件的台架快速老化循环设计思路,并在试验的基础上开发出适合中国道路条件下的台架快速老化循环。结果表明,开发的老化循环在循环的基本形状上修正一些参数,调整老化时间,能预测每个车型的实车老化。

  11. 车辆视频导航中道路检测方法研究进展%Research progress on road detection method in video navigation for vehicle

    Institute of Scientific and Technical Information of China (English)

    高华; 刘济林

    2012-01-01

    视频导航以其获取信息丰富、对环境影响小、成本低廉等诸多优点成为了辅助车辆自动驾驶和陆地自主车( ALV)常用的一种自动导航方式,而从视频导航图像中检测出道路区域则是实现视频导航的基础和关键.对近年来车辆视频导航过程中道路检测的实现算法进行了回顾和分析,并对道路检测算法以后的研究方向进行了探讨.%Because of a great deal of advantages, such as more abundant acquired information, small influence on environment,low cost and etc,the video navigation has become a most common navigation method for vehicle. At the same time, road detection which means finding the road region from the navigation video is the basis and key of video navigation. The research of the road-detection from navigation video is summarized. The main problem and prospect of the road detection is discussed.

  12. Research progress of power system for hydrogen-electric hybrid fuel cell vehicles%氢电混合燃料电池汽车动力系统研究进展

    Institute of Scientific and Technical Information of China (English)

    倪红军; 吕帅帅; 陈青青; 裴一

    2015-01-01

    Fuel cellhybrid vehicle (FCV) with zero emission and high efficiency is the ideal solution for sustainable mobility in the future. A new type of hydrogen fuel cells-lithium-ion battery hybrid power system was introduced; the energy efficiency factors as wel as improvement methods of fuel cellhybrid system were discussed. The research progress of hydrogen fuel cellvehicles power system at home and abroad was summarized.%零排放和高效率的燃料电池混合动力汽车是人类“可持续移动”的最理想解决方案。介绍了一种氢燃料电池-锂离子电池混合动力系统;讨论了车用燃料电池动力系统能源效率的影响因素及提高动力系统效率的途径,总结了氢燃料电池汽车动力系统的国内外研究进展。

  13. Variable-Reluctance Motor For Electric Vehicles

    Science.gov (United States)

    Lang, Jeffrey H.

    1987-01-01

    Report describes research on variable-reluctance electric-motor drive for eventual use in electric-vehicle propulsion. Primary design and performance criteria were torque and power output per unit mass of motor, cost, and drive efficiency. For each criterion, optimized drive design developed, and designs unified to yield single electric-vehicle drive. Scaled-down motor performed as expected. Prototype of paraplegic lift operated by toggle switch and joystick. Lift plugs into household electrical outlet for recharging when not in use.

  14. Impacts of Vehicle (In)Security

    Energy Technology Data Exchange (ETDEWEB)

    Chugg, J.; Rohde, K.

    2015-05-01

    Nuclear and radioactive material is routinely transported worldwide every day. Since 2010, the complexity of the transport vehicle to support such activities has grown exponentially. Many core functions of a vehicle are now handled by small embedded computer modules with more being added each year to enhance the owner’s experience and convenience. With a system as complex as today’s automobile, the potential for cyber security issues is certain. Hackers have begun exploring this new domain with public information increasingly disseminated. Because vehicles are allowed into and around secure nuclear facilities, the potential for using a vehicle as a new cyber entry point or vector into the facility is now plausible and must be mitigated. In addition, compromising such a vehicle could aide in illicit removal of nuclear material, putting sensitive cargo at risk. Because cyber attacks can now be introduced using vehicles, cyber security, needs to be integrated into an organization’s design basis threat document. Essentially, a vehicle now extends the perimeter for which security professionals are responsible.Electronic Control Units (ECU) responsible for handling all core and ancillary vehicle functions are interconnected using the controller area network (CAN) bus. A typical CAN network in a modern automobile contains 50 or more ECUs. The CAN protocol now supports a wide variety of areas, including automotive, road transportation, rail transportation, industrial automation, power generation, maritime, military vehicles, aviation, and medical devices. In many ways, the nuclear industry is employing the CAN bus protocol or other similar broadcast serial networks. This paper will provide an overview of the current state of automobile and CAN Bus security, as well as an overview of what has been publicly disclosed by many research organizations. It will then present several hypotheses of how vehicle security issues may impact nuclear activities. An initial

  15. Environmental Evaluation of New Generation Vehicles and Vehicle Components

    Energy Technology Data Exchange (ETDEWEB)

    Schexnayder, S.M.

    2002-02-06

    This report documents assessments that address waste issues and life cycle impacts associated with the vehicle materials and vehicle technologies being developed under the Partnership for a New Generation of Vehicles (PNGV) program. We refer to these vehicles as 3XVs, referring to the PNGV goal that their fuel mileage be three times better than the baseline vehicle. To meet the program's fuel consumption goals, these vehicles substitute lightweight materials for heavier materials such as steel and iron that currently dominate the composition of vehicles, and use engineering and power system changes. Alternative power systems being developed through the PNGV program include batteries for hybrid electric vehicles and fuel cells. With respect to all these developments, it is imperative to learn what effects they will have on the environment before adopting these designs and technologies on a large-scale basis.

  16. 尾坐式超小型无人机的流体动力学仿真研究%Fluid Dynamics Simulation Research on Tail-sitter Subminiature Unmanned Aerial Vehicle

    Institute of Scientific and Technical Information of China (English)

    张志峰; 饶进军

    2011-01-01

    The tail-sitter unmanned aerial vehicle (UAV) is a type of UAV with tail-sitter design as well as the function of vertical takeoff and landing (VTOL). The vehicle not only has the advantages of high flight efficiency and cruising speed of fixed-wing UAV, but also the capabilities of VTOL and hovering of rotor-type UAV. All these advantages provide the tail-sitter UAV with research significance and high application value. To study the aerodynamic performance of the tail-sitter UAV under the specific conditions of subminaturization and low Reynolds number, the commercial CFD software was used to carry out a three dimensional numerical simulation of fluid dynamics. The main aerodynamic characteristics of UAV were acquired.Lift and drag coefficients, as well as other characteristics of UAV under certain cruising speed, were analyzed in order to prepare for the overall optimization of UAV.%尾坐式无人机是一种采用尾坐式设计的具有垂直起降功能的无人机,该机不仅具有固定翼无人机飞行效率高、巡航速度快等优点,又有旋翼式无人机垂直起降和悬停的能力,具有很高的研究意义和应用价值.为了研究尾坐式无人机在尺寸超小型化和低雷诺数特定条件下的气动性能.利用商业CFD软件对其进行三维流体动力学数值模拟,获取无人机的主要气动特性,并对巡航速度条件下的升力系数、阻力系数等进行了分析研究,为无人机的整体优化做准备.

  17. Research on Logistics Vehicle Routing Problem Based on Improved QPSO Algorithm%基于改进QPSO算法的物流运输路径问题研究

    Institute of Scientific and Technical Information of China (English)

    高晓巍

    2013-01-01

    Traditional logistics transportation routing problem of research on the model is singleness,and is difficult to meet the actual needs of logistics.The path search algorithm of global search ability is weak,and easy to fall into local extremum points.To effectively allocate vehicles,reduce logistics cost,and improve the competitive ability of enterprises with logistics transportation cost minimization and customer satisfaction maximization as the aim,this paper transformed multi-objective optimization model into single objective optimization model with the aid of weight coefficient transform method and constructed an improved QPSO algorithm to solve the problem.The simulation experiment results show that the improved QPSO algorithm shows better stability and convergence speed in solving the problem of logistics transportation routing of multiple distribution center and many vehicles,and has obvious advantages over QPSO algorithm.%传统的物流运输路径问题研究在模型建立上比较单一,难以满足物流运输的实际需要;路径搜索算法的全局搜索能力弱,并容易陷入局部极值点.为了有效的进行车辆调配,降低物流成本,提高企业的竞争能力,提出以物流运输成本最小化与顾客满意程度最大化为目标,借助权重系数变换法将多目标优化模型转换成单目标优化模型,并构造改进的QPSO算法进行求解.仿真结果表明,改进的QPSO算法在求解多配置中心多车辆的物流运输路径问题中呈现出了较好的稳定性与收敛速度,为运输路径优化提供了参考.

  18. 航行器垂直入水空泡特性与流体动力研究%Research on Cavitation and Hydrodynamic of Vertical Water- Entry for Supercavitating Vehicles

    Institute of Scientific and Technical Information of China (English)

    胡平超; 张宇文; 袁绪龙

    2011-01-01

    Study on caviting shape and hydrodynamic on vertical water - entry of supercavitating vehicles.Based on standard k - ε model, the unsteady cavity character in a longitudinal gravity force field was numerically simulated by using 3D dynamic mesh technique during the supercavitating vehicle vertical enter water.Result shows that the angle of attack is larger, the asymmetry of the cavity is more obvious, the cavity of the confronted stream surface is shorter and thinner, the cavity of the opposing stream surface is longer and thicker, and the time difference of the closed cavity of the confronted and the opposing stream surface is longer.The angle of attack is larger, the hydrodynamic coefficient is larger; at the same water - entry depth, the slop of the drag coefficient curve is approximate equivalent at different angle of attack, and the slop of the lift coefficient curve and the pitching moment coefficient curve is larger with a larger angle of attack.The result can be used for research on water - entry trajectory.%研究超空泡航行器垂直入水空泡形态与流体动力特性,针对空泡出现流体动力特性改变,为了确定入水参数,根据标准k-E模型,采用三维动网格技术,对超空泡航行器入水过程重力场下非定常空泡特性以及流体动力参数进行了数值仿真.得出结果,攻角越大,空泡形态不对称性越明显,迎流面空泡越短越薄,背流面空泡越长越厚,迎流面与背流面的空泡闭合时差越大,且流体动力系数越大.证明对同-入水深度时,从曲线上分析,阻力系数的斜率基本一致,升力系数与俯仰力矩系数的斜率随攻角的增大而增大.研究结果可为入水弹道的研究提供了流体动力参数.

  19. Evaluation Methodology for Surface Engineering Techniques to Improve Powertrain Efficiency in Military Vehicles

    Science.gov (United States)

    2012-06-01

    efficiency within military vehicle drivetrains . This report details the experimental methodology developed by the U.S. Army Research Laboratory to...experiments are conducted on a subsystem component of a vehicle drivetrain . A parallel basic research thrust includes computational modeling of...of research efforts at the basic and applied research level to advance theoretical and practical understanding of drivetrain component efficiencies

  20. Aerodynamics support of research instrument development

    Science.gov (United States)

    Miller, L. Scott

    1990-01-01

    A new velocimetry system is currently being developed at NASA LaRC. The device, known as a Doppler global velocimeter (DGV), can record three velocity components within a plane simultaneously and in near real time. To make measurements the DGV, like many other velocimetry systems, relies on the scattering of light from numerous small particles in a flow field. The particles or seeds are illuminated by a sheet of laser light and viewed by two CCD cameras. The scattered light from the particles will have a frequency which is a function of the source laser light frequency, the viewing angle, and most importantly the seed velocities. By determining the scattered light intensity the velocity can be measured at all points within the light sheet simultaneously. Upon completion of DGV component construction and initial check out a series of tests in the Basic Aerodynamic Research (wind) Tunnel (BART) are scheduled to verify instrument operation and accuracy. If the results are satisfactory, application of the DGV to flight measurements on the F-18 High Alpha Research Vehicle (HARV) are planned. The DGV verification test in the BART facility will utilize a 75 degree swept delta wing model. A major task undertaken this summer included evaluation of previous results for this model. A specific series of tests matching exactly the previous tests and exploring new DGV capabilities were developed and suggested. Another task undertaken was to study DGV system installation possibilities in the F-18 HARV aircraft. In addition, a simple seeding system modification was developed and utilized to make Particle Imaging Velocimetry (PIV) measurements in the BART facility.