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http://dx.doi.org/10.22680/kasa2019.11.2.023

An Experimental Study of Optimal Performance of Rear Wheel Steering Vehicle for Maneuverability  

Ann, Kookjin (서울대학교 공과대학 기계항공공학부)
Joa, Eunhyek (서울대학교 공과대학 기계항공공학부)
Park, Kwanwoo (서울대학교 공과대학 기계항공공학부)
Yoon, Youngsik (현대자동차)
Yi, Kyongsu (서울대학교 공과대학 기계항공공학부)
Publication Information
Journal of Auto-vehicle Safety Association / v.11, no.2, 2019 , pp. 23-28 More about this Journal
Abstract
This paper presents an optimal performance of rear wheel steering vehicle for maneuverability. The maneuverability of vehicle is evaluated in terms of yaw rate, body slip angle and driver input. The maneuverability of vehicle can be improved by rear wheel steering system. To obtain optimal performance of rear wheel steering vehicle, the optimal control history is designed. The high dimensional trajectory optimization problem is solved by formulating a quadratic program considering rear wheel steer input. To evaluate handling performance 7 degree-of-freedom vehicle model with actuation sub-models is designed. A step steer test is conducted to evaluate rear wheel steering vehicle. A response time, a TB factor, overshoot, and yaw rate gain are investigated through objective criteria, assessment webs. The handling performance of vehicle is evaluated via computer simulations. It has been shown from simulation studies that optimal controlled rear wheel steering vehicle provides improved performance compared to others.
Keywords
Optimal performance; Rear wheel steering vehicle; Assessment web; Step steer test;
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