Networked PMSM System with Multiple-step Predictive Control and Sliding Mode Control

In this paper, a novel robust control approach is proposed for the speed control of permanent magnet synchronous motor (PMSM) working in a network transmission environment. Based on the decoupled model of PMSM by using the vector control technology, the traditional point-to-point sliding mode (SM) control scheme with a double closed-loop structure is first given for comparison. The influence of network delay on the system is the concerned issue in this paper. For the time-varying network delay, the queuing theory is introduced to make it a fixed value. By combining multiple-step predictive control and SM control, a novel controller is designed, following its guaranteed stability condition based on Lyapunov theory. The simulations validate the proposed approach.