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The paper develops the map matching algorithm based on GPS/DR integrated positioning system through the determination of error influence area, the choice of matching road section and the modification of positioning information, and then evaluates the reliability of the matching result through the fuzzy comprehensive evaluation. The algorithm is test with the outdoor in-vehicle experiment and has shown...
Based on a cab suspension system of a commercial vehicle, a multi-body dynamic model was built on ADAMS Software for the vibration modal analysis. An Experiment was taken for the verification of the model's accuracy. Through the energy decoupling theory, the cab suspension system was optimized. By analyzing the optimized parameters, the suspension's stiffness and position were determined, which gave...
This paper considers a new transportation problem: Lane Reservation Problem in Time Constrained Transportation. This kind of problem comes from large sportive events in a city or region where the travel time between sportive villages and stadium should fall in a strict time window. To guarantee the athlete transportation in time, the problem consists in temporarily creating special lanes on roads...
This paper develops a new method for minimizing intersection delay based on linear and nonlinear program. On the basis of geometric construction, a new set of formulas are proposed to estimate the steady-and-oversaturation delay. As a dynamic model, it can automatically allocate the green time to obtain the minimal delay. Since the objective function of delay is linear or nonlinear, only the combination...
We propose a method for solving the crew rescheduling problem (CRP) and the vehicle rescheduling problem (VRP) based on the Lagrangian relaxation method. The CRP/VRP is formulated as an integer programming problem on the basis of a network flow modeling approach from which a Lagrangian relaxation problem is constructed by relaxing the constraint that covers multiple resources. Using two procedures...
In the practical application of Vehicle Plate Recognition, it is greatly effective on Vehicle Plate Recognition for the variety of exterior illumination. which is the most important problems to be taken into account, for realizing excellent Vehicle Plate Recognition system. The paper brings forward an Acquiring Image Adaptive Control System (AIACS) based on locomotor Vehicle through long-term research...
With ARM7 as the core, the new intelligent mobile vehicle checking system integrated a lot of hardware modules such as video capture, GPS positioning and wireless transmission, the design of the system software used the embedded software developing platform based on ADS integrated development environment. By the hardware/software co-design, the new intelligent mobile vehicle checking system implemented...
With the development of intelligent transportation system (ITS), information-collection plays an increasingly important role. Research is based on Zigbee protocol for wireless sensor network technology, combined with video coding, designed a traffic data-acquisition system. Network nodes are distributed in the monitored area regularly, and responsible for collecting traffic video information, self-organizing...
Current active transit signal priority (TSP) methods are based on real-time detection of information, often with the green extension and early green to make bus pass through the intersection as soon as possible. In this paper, according to domestic environment, applying active transit signal priority in artery coordination system, using related transit priority principle and parameter, can not only...
The electronic stability control system is one of most advanced active safety technology for modern vehicles. It enhances vehicle active safety effectively. The control algorithm of combination with logic gate and PID control is brought out. The PID parameters are produced by logic gate control and the wheel brake torque to keep vehicle stabilization is outputted by PID method. The method possess...
Rollover is one of the main traffic accident forms for vehicle. According to the datas recently, rollover has become the second most serious accident. However, the study on rollover in China is at the beginning. The study on vehicle rollover is based on the theories of rollover. In order to optimize vehicle configuration,and enhance vehicle rollover stability,and ensure the road safety, rollover model...
A turning control strategy based on BP neutral network and modified by a PID algorithm is presented in this paper for the dual electric tracked vehicle. Firstly analyzed the tracked vehicle turning dynamics and establish the torque distribution strategy. The BP network is trained by data from the distribution strategy simulation results; the PID algorithm is used to eliminate the dependence of terra...
In this paper, a six degree of freedom half body vehicle suspension system is developed and the road roughness intensity is modeled as a filtered white noise stochastic process. Based on control theory, the fuzzy control system of the active suspension is established. With the aid of software Matlab/simulink, simulation process is done. Simulation results indicate that the proposed active suspension...
The indoor test bed of the Autonomous Systems Laboratory has been used to create a control system for a small fixed pitch helicopter. This paper outlines the challenges posed by such a vehicle and the control system designed to overcome them. The control system utilized a visual tracking system to obtain state information without onboard hardware. Matlab/Simulink environment was used to facilitate...
Microscopic traffic simulation is an effective way to analyze the feature and behavior of transportation systems. However performing microscopic simulations for large-scale networks remains a huge computing problem. Intensive computation characteristics displayed in traffic simulation can benefit from parallel, distributed processing. Based on simplified models, a MPI based distributed parallel traffic...
According to the fact that the quality evaluation process of traffic information estimated by floating cars is neglected or on which models used are unreasonable in existing researches, which lead to blind application of traffic information for users, a method for estimating the reliability degree of traffic information based on floating car is designed considering sample sizes of floating car, and...
Vehicle license plate location is an important part of a license plate recognition system. This paper proposed a new location method for plate under complex scenes based on horizontal gradient and morphological operation. Firstly, horizontal gradient image was obtained by horizontal difference on the grayscale image. Secondly, an adaptive threshold proposed in this paper was used to segment the gradient...
When braking on split-μ road, yaw moment and steering force of vehicle will be produced because the braking force is different for two side wheels. In order to deal with this problem, the modified independent control mode is widely applied, however, there also exits some defects. Because the gap of the adhensive coefficient of both sides is uncertain while braking, if the fixed modified coefficient...
Tactical warfare process, e.g., engagement between opposite forces, is full of unpredictability and platform-level interactions that result great difficulties in performing virtual battlefield simulation. In this paper, a novel approach, i.e., multi-agent interactions centric simulation is applied to solve the problem. Based on the analysis on the requirement and countermeasure, the mapping from tactical...
This paper develops an LMI-based solution for output-feedback constrained H∞ control design, and considers it for active vehicle suspension system. A quarter car model, which captures many features of real structures, is used in this study. To take more general road disturbances than white noise into account in the design procedure, H∞ performance measure is used to judge ride comfort, ride safety...
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