Fuzzy-sliding Mode Control for BLDCM Servo System

In this paper a fuzzy sliding mode variable structure controller is designed for BLDCM servo system. Sliding mode control has speedy response, high accuracy and strong rubustness, but produces the chattering. In the design, fuzzy control is combined with sliding mode control, and fuzzy inference is used to regulate the magnitude of on-off control. The chattering bringing by sliding mode switch control can be effectively weakened, without sacrificing the strong robustness to parameter variations and external disturbance. Simulation study shows that the system possesses high accuracy and strong robustness, and develops the capability wonderfully.