Abstract
Automotive suspension consists of a suspension spring and a damper, and contributes to the performance of ride comfort and road-hugging property. Generally, it is well known that a trade-off exists between ride comfort and road-hugging property. In order to overcome this problem, respectively, damper has nonlinear characteristic that varies according to the relative velocity of suspension and controlled suspension systems are employed. However, there are few controller designs considering nonlinear damping characteristic depended on relative velocity of suspension. It needs the controller considering nonlinear characteristic of damper in order to adopt various road condition. Therefore we address the controller design considering nonlinear characteristic of damper. We proposed reasonable design of gain-scheduling controller adopting nonlinear characteristic of damper. In order to investigate effectiveness of proposed method, we carried out simulations assumed various road conditions. As a result, the proposed method demonstrated comprehensively good performance compared to the linear controller.
