OPTIMAL ADAPTIVE ACTIVE SUSPENSIONS FOR A FULL CAR MODEL

In order to present a useful method for designing active suspension of a vehicle, a linear full-car model is used in this investigation. In this model, the dampers of passive system are totally replaced by actu ators. The actuators are controlled with optimal full state vector fee dback. After determining feedback coefficients, the responses of activ e and passive systems were compared and it was found that performance of active system is much superior. It is desired that, changes in vehi cle parameters would not affect the system's performance and hence sho uld not violate its optimality. In other words, the system should beha ve adaptively using Model Reference Adaptive Control. The optimally co ntrolled active suspension was used as a model for the active suspensi on of vehicle, In this way, the suspension of vehicle is controlled in such a way that its output approaches to that of the optimal active m odel. Thus the suspension should behave just like the optimal one.