Disturbance rejection in a brushless DC motor velocity controlsystem using a variable structure controller

摘要

This paper presents a study of the performance of a brushless DCn(BLDC) motor velocity control system. The system uses a variablenstructure controller in order to enhance the ability to reject externalndisturbances and internal nonlinearities. The motor and system equationsninherently appear in a regular form and this simplifies the controllerndesign. Chattering resulted from switching the controller structure isnminimized by a continuously adaptive smoothing control command.nSimulation results had shown an improved performance over cases with nonswitching and with constant switching magnitude on the controllernstructure