Optimal Control of Semi-Active Suspension Quarter Car Employing Magnetorheological Damper and Dahl Model

摘要

This paper deal with the problem of controlling semiactive suspension for quarter-car. In this document, the semi-active suspension uses a Magnetorheological (MR) damper including hysteretic behavior captured through the Dahl model. The objective of the control is to regulate well the chassis vertical position although the road irregularities. The inaccessibility to measurements of the hysteresis internal state variable causes a serious control problem. The control is performed using LQR control design. Two controllers are developed, such as: the Skyhook control and the LQR technique. Through the numerical simulation, the performances of each controller are compared with the passive suspension in the time domains. The results show that the performance of a MR suspension system is highly dependent on the choice of the controller employed, and the LQR strategy exhibits an excellent performance.