Abstract:Focusing on the effects of parameter uncertainties,fiction,and external disturbances existed in the permanent magnet linear motor servo systems,a kind of adaptive soft switching sliding mode position control scheme was proposed.The discretization state space mode of the linear motor servo systems was obtained.Then,the sliding mode controller with adaptive switching gain was designed on the discretization state space system mode.Next,the stability of the designed closedloop control system was analyzed and the performance of the system was further improved by using the tangent function instead of the symbolic function.Finally,the simulation results show that the proposed scheme has better performance than classical PID control and sliding mode control.