[차량운동성능부문] 상태변수/노면입력 관측기를 이용한 반능동 현가시스템 제어

This paper deals with an observer-based preview control for semi-active suspensions. An Observer has been designed such that all the state variables and road inputs can be estimated from accelerations Since the road input to the rear wheels is a delayed version of that to the front wheels. it can be obtained by estimating of the road input to the front wheels without preview sensors. The performance of LQ optimal control and the wheelbase preview control using the estimated values of state and the estimated road input has been investigated. The results show that the observer-based control can provide good performance. The observer-based preview control improves the dynamic behavior of the rear axle and that of pitch motion compared to the LQ optimal control.