Decentralized control of active vehicle suspensions with preview

In this paper a decentralized control of active vehicle suspensions with preview of road irregularities is considered using a two-degree-of-freedom vehicle model. It is shown that by taking advantage of the separation between the eigenvalues of the slow subsystem representing the body mode, and the fast subsystem corresponding to the wheel model design of the preview controller can be decoupled. Since decentralized preview controllers are synthesized independently for two single-degree-of-freedom systems, analytical solutions are obtained. The results of analysis and simulations demonstrate that the performance of the system with the proposed controller is comparable to that obtained for the optimal preview controller based on a fully interconnected system.