Sliding mode variable structure control for the tracking servo system

According to the theory of sliding mode variable structure control,this paper discusses a design method of the sliding mode variable structure controller based on pole-placement for the tracking servo system,which contains nonlinearities and parameters uncertainties.It establishes the math model of the control system,gives the computing process of determining the switching function by adopting pole-place method and determining the control function by adopting reaching law.Simulation results show that the new control method exhibits higher performance than the classical control method.The rapidness and robustness of the system are improved.The overshoot is reduced.Moreover,this control system's realization is simple because of its simple structure.