Design of a Variable Structure Controller having Chattering Alleviation Characteristics for the Speed Control of Sinusoidal type Brushless DC Motor

정현파형 브러시리스 직류전동기의 속도 제어를 위한 채터링 저감 특성을 갖는 가변구조 제어기 설계

In this paper, a chattering alleviation ISM speed controller for the sinusoidal type BIDC motor is designed. Dead Zone function is proposed to change the chattering occurring in the transient state form high frequency to low frequency and time-varying gains are applied for the control input to eliminate the steady state excessive chattering in the conventional ISM. The proposed Dead Zone function represents the sliding layer composed of two switching surfaces and if a state vector exists in this layer, the chattering don’t occur. Simulation and experimental results confirm the useful effects of the above algorithm.