Permanent Magnet Linear Synchronous Motor Drive Using Adaptive Backstepping Sliding Mode Control

A robust control technique for permanent magnet linear synchronous motors (PMLSM) using adaptive backstepping sliding mode control (ABSMC) is presented. Considering the lumped uncertainties with parameter variations and external disturbance for an actual PMLSM drives, a backstepping sliding mode control law is derived by backstepping design technique. However, the bound of the lumped uncertainty is difficult to obtain in advance in practical applications. An adaptive law is proposed to adapt the value of the lumped uncertainty. Comparing with the backstepping sliding mode control (BSMC), simulated results show that the ABSMC possesses better position tracking performances and robustness to uncertainty for PMLSM drive, and reduces evidently the chattering of ABSMC.