Reduced order fuzzy sliding mode control for linear synchronous motor systems

This paper proposed a new fuzzy sliding mode controller that integrates the fuzzy logic control and the sliding mode control method. The proposed controller allows designers to employ switching function as the fuzzy logic control input directly in permanent magnet linear synchronous motor systems. Furthermore, the fuzzy logic control rule is independent of the number of system state variables, and can be minimized. Our proposed controlled system can be performed without the need of the complicated frame transform based on the direct thrust control policy. Additionally, the fast response of the closed loop system can be obtained and the chattering phenomenon can be avoided. Finally, the effectiveness of this control scheme is verified by the simulation and experimental results.