Abstract
In recent years, a semi-active suspension has been put into practical use in order to improve ride-comfort and driving stability of automobiles. However, there is a problem for the case of running on rough roads that temperature of the damper rises extremely because of heat generation due to friction at pistons and fluid friction at orifices at the damper. In this study, the bilinear disturbance accommodating optimal control theory is applied to the semi-active suspension and by taking the temperature rise of dampers into the design concept of the controller, a systematic design method of the controller is proposed, which maintains good balance of damper temperature and control performance. Furthermore by using gain-scheduling, an adaptive control algorithm which changes the weight between ride-comfort and temperature. As a result of computer simulation, it was demonstrated that the proposed method is useful.
