Sliding Mode Control of Permanent Magnet Linear Synchronous Motors Based on an Adaptive Sliding Mode Reaching Law

To enhance the position tracking performance of the permanent magnet linear synchronous motor (PMLSM), an improved sliding mode control approach based on an adaptive sliding mode reaching law (ASMRL) is proposed. The ASMRL method not only have the ability to effectively suppress the chattering phenomenon inherent in the traditional sliding mode control (SMC), but also enhances the control precision of the PMLSM systems. The stability of the controller is demonstrated by using the Lyapunov function. The improved tracking accuracy, achieving precision levels down to five micrometers. The effectiveness and superiority of the ASMRL method are verified through both simulation and experimental results.