Adaptive back-stepping control for the sectioned permanent magnetic linear synchronous motor in vehicle transportation system

Compared to other kinds of motor used in the vehicle transportation systems, the permanent magnet linear synchronous motor (PMSLM) is favorable for the advantages such as high efficiency, high power density, excellent controllability and without middle mechanical transmission. Dividing the long primary into sections, the sectioned PMLSM does well in energy saving, secularity, reliability and maintenance. In this paper, the sectioned PMLSM used in vehicle transportation system (VTS) is designed, whose winding in the primary is divided into two sections. To eliminate the external disturbance and parameter variation, an adaptive back-stepping controller with parameters estimation for a PMSLM speed control system is proposed and the detailed design procedure is discussed. The speed tracking responses with adaptive backstepping controller and PI controller are compared. The simulation results validate the proposed control method.