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In order to solve the position control problem of AC servo system, a new control strategy for the position based on sliding mode control and predictive control is proposed. The sliding mode control law is deduced, and according to the dynamic matrix theory, predictive model, controller and corrector are designed. The sliding mode predictive controller can restrain the change of system parameters and load disturbance, improve the system dynamic and static characteristic. The simulation results show that sliding mode predictive controller can guarantee the robustness of the control system. KEYWORD: Position Control; Sliding Mode Control; Predictive Control; AC Servo System International Conference on Industrial Technology and Management Science (ITMS 2015) © 2015. The authors Published by Atlantis Press 1554 2 1 x x c s   (6) Let c>0. The sliding mode output is as follows: ref K x x u     1 2 2 1 1    (7) The controller parameters for the position loop of sliding mode variable structure are as follows:

Design of sliding mode predictive controller for AC servo system