Integrated control of steering and suspension systems for full car models in crosswind and road disturbances

This paper presents an integrated control of steering and suspension systems for full car models in crosswind and road disturbances. The steering control is obtained as the steering angles of the front/rear wheels, and it is composed of the driver steering control due to the driver model, the feed-forward steering control to reduce the effect of the crosswind, and the feedback control by means of fuzzy reasoning to improve the performance of the vehicle handling and stability. The suspension control is constructed through an active suspension force by means of fuzzy reasoning to improve the performance of the vehicle's riding comfort. The estimates for the time evolutions of the disturbances are respectively obtained by means of the minimum-order observer. The fuzzy reasoning is based on the Single Input Rule Modules (SIRMs) to reduce the number of fuzzy control rules. The simulation result indicates that the proposed method is very effective in the performance of the vehicle handling, stability and ride comfort.

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