Abstract

This paper presents a hybrid adaptive fuzzy variable structure speed controller (HAFVSSC) for brushless DC motor (BLDCM). The proposed controller is composed of an adaptive fuzzy variable structure control term and a supervisory control term. It has the advantages of fast response and invariance to the disturbances. In the proposed controller, the supervisory control term guarantees the stability of the system, while an online adaptive algorithm adjusts the control effort of the fuzzy controller. The algorithm brings several advantages, such as simplification of the fuzzy controller design, system dynamic response improvements, chattering reduction, and no need to know the upper bound of the perturbations beforehand. Experimental results show that the proposed HAFVSSC for BLDCM provides a high performance.

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