Brushless DC motor sliding mode control with Kalman Filter

A brushless DC motor (BLDCM) state equations based on speed error are established in this paper, and a sliding mode controller with a variable structure based on exponential reaching law is designed for speed regulation of BLDCM. Kalman Filter is used to improve the performance in the situation of noise disturbance. The control performances of variable-structure controller presented in this paper and double close-loop speed regulator are contrasted and analyzed in different situations. From the results of simulation, it can be known that the controller presented in this paper has good performance on many aspects such as response speed, anti-disturbance and so on. Furthermore, the Kalman Filter can effectively weaken controller´s chattering and improve the precision of system.