Robust control for the indefinite model of the semi-active suspension system

Today, extensive research is being done on advanced control methods for a semi-active suspension system. Efforts are being made to achieve more safety for passengers and comfortable driving. On the other hand, the presence of disturbances and uncertainties in the dynamical systems are inevitable, and the uncertain suspension of the car will not be excluded. In this paper, a control structure consisting of sliding mode control, fuzzy logic method and predictive filter has been proposed that has high resistance in confrontation with road disturbances and uncertainty in dynamical system. Improving the performance of sliding mode controller by intelligently selecting its parameters with the help of fuzzy logic and using a powerful predictor in the refinement of uncertain damaged data system can be regarded as the innovation of the proposed algorithm. Simulation results show the optimal performance of a semi-active suspension system in the presence of road disturbances and uncertainties