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International Journal of Automotive Technology > Volume 9(5); 2008 > Article
International Journal of Automotive Technology 2008;9(5): 571-576.
VEHICLE STABILITY CONTROL SYSTEM FOR ENHANCING STEERABILTY, LATERAL STABILITY, AND ROLL STABILITY
J.-S. JO1, S.-H. YOU2, J. Y. JOENG1, K. I. LEE1, K. YI1
1Seoul National University
2Hyundai Motor Company
ABSTRACT
The Vehicle stability control system is an active safety system designed to prevent accidents from occurring and to stabilize dynamic maneuvers of a vehicle by generating an artificial yaw moment using differential brakes. In this paper, in order to enhance vehicle steerability, lateral stability, and roll stability, each reference yaw rate is designed and combined into a target yaw rate depending on the driving situation. A yaw rate controller is designed to track the target yaw rate based on sliding mode control theory. To generate the total yaw moment required from the proposed yaw rate controller, each brake pressure is properly distributed with effective control wheel decision. Estimators are developed to identify the roll angle and body sideslip angle of a vehicle based on the simplified roll dynamics model and parameter adaptation approach. The performance of the proposed vehicle stability control system and estimation algorithms is verified with simulation results and experimental results.
Key Words: Vehicle stability control system, Target yaw rate, Yaw rate controller, Brake pressure distribution, Roll angle estimator, Body sideslip angle estimator
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