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The rapid development of the Dedicated Short Range Communications (DSRC) has provide a good opportunity for solving the increasingly outstanding traffic safety problems. One noteworthy function enabled by DSRC is the end of queue (EOQ) collision warning system. However, the reliability of the system is easily affected by some easily ignorable factors like DSRC penetration rate, DSRC communication...
The purpose of this work is to explore the possibility of using (Multi-disciplinary Design and Optimization) MDO frameworks for complex system design of space experiment. Considering both launch and space environmental requirements, the multi-objective optimization of a novel nested flying vehicle for space science experiments is carried out by decreasing launch weight, frequency response, vacuum...
This paper presents the development and validation of an automatic steering controller that has been successfully implemented on a 18.3-m articulated bus for revenue service in Eugene, Oregon, USA. The automated steering system provides both lane keeping and S-curve precision docking on a 4-km-long narrow and curving urban segment with six stations and mixed traffic lanes while the operator controls...
As part of a number of Intelligent Transportation (ITS) applications aimed at providing an environmental benefit, eco-approach technology is one that is feasible in the near-term. An eco-approach application uses Signal Phase and Timing (SPaT) and intersection map information of signalized intersections to provide drivers with recommendations in order to encourage “green” driving while approaching,...
A study on injuries of far side passenger in vehicle side impact was carried out by using a real road accident. Firstly, the trace of the accident car was reproduced using PC-Crash code. The impact velocity of the passenger car calculated from PC-Crash was used as the input data for MADYMO modeling of occupant kinematics. Then the dynamic responses of the occupants were analyzed using the calculated...
Autonomous robotic vehicles are playing an increasingly important role in support of a wide variety of present and future critical missions. Due to the absence of timely operator/pilot interaction and potential catastrophic consequence of unattended faults and failures, a real-time, onboard health and contingency management system is desired. This system would be capable of detecting and isolating...
This paper reports on a red-light-running (RLR) prediction scheme for an intersection collision avoidance system that dynamically extends the all-red phase to avoid RLR related collisions. The paper addresses the issues of predicting the red-light running using an infrastructure-based sensor and a vehicle-to-roadside communication (Intellidrive) system. In the infrastructure-based sensor case, we...
The results of an experimental work on the lateral control of a full-scaled vehicle are reported in this paper. Two control algorithms were tested, a simple PID controller to serve as the baseline, and an optimal preview controller, which was developed to improve the tracking performance, ride quality and robustness of the system. The theoretical development and the experimental setup are briefly...
The work presented in this paper addresses issues regarding the implementation of an integration of several specific technologies involved in achieving lateral guidance of an experimental automotive vehicle on an automated highway. Results are shown to demonstrate the feasibility of the proposed discrete magnetic marker reference/sensing system. In addition, the performance and limitations of a PID/feedforward...
This paper investigates a methodology for quantitatively evaluating the safety of an IVHS system. The methodology provides a technical basis for establishing the target safety levels for designing the safety-critical components of an IVHS system, in particular those that perform control functions. In addition, this methodology also provides a means for specifying the safety criteria for an automatic...
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