Integrated strategy of Permanent Magnet Linear Synchronous Motor based on sliding mode control and repetitive control

To improve the tracking precision, integrated control strategy of Permanent Magnet Linear Synchronous Motor (PMLSM) based on sliding mode control and repetitive control was proposed in this paper. Because PMLSM is easily affected by the periodic thrust fluctuation caused by the end effect, the periodic friction and other aperiodic disturbance during operating. The speed controller and the current controller based on two-order sliding mode were designed to restrain kinds of aperiodic disturbance. Supper-twisting algorithm was adopted as the control law of two-order sliding mode to decrease chattering phenomenon. The position controller based on PD and repetitive control was designed to restrain the periodic disturbances during tracking. Simulation results show that this strategy have better tracking precision, stronger robustness and faster response speed.