Speed Control of Brushless DC Motor Based on CMAC and PID Controller

Abstract

The brushless DC motor (BLDCM) has such advantages as simple structure, convenient to control, high reliability, high efficiency, and has been applied in many industrial fields. Conventional controllers suffer from uncertain parameters and the nonlinear of the BLDCM. To overcome the shortcomings of the conventional controller, this paper presents a novel strategy on the basis of compound control using cerebellar model articulation controller (CMAC) and PID controller. Through compound control using CMAC and PID controller the system realizes double-fed control. CMAC forms feedforward controller of the system and realizes the dynamic model of the controlled device; conventional PID controller is used to make up of feedback controller which ensures system stability and depresses disturbance. In this paper, a program written in Visual C++ functions to adjust the compound controller off-line. At last, a TMS320LF2407A digital signal processor (DSP) is used to fully prove the flexibility of the control scheme in real time. The system realizes the self-adjustment pursuit of the speed reference model to a better degree, has the advantages of flexible control, strong adaptability, and achieves higher control accuracy and better robustness