其他摘要：The brushless direct current motor control system is a complex one with multi-variables, time-variability and non-linear. Regarding to the problems of large overshoot of simple PID control method in the motor start-up phase and insufficiency of anti-load disturbance ability when the load fluctuates suddenly, this thesis proposes an improved program. Parameter self-tuning fuzzy-PID control method is used for the speed loop of the motor control system. The brushless direct current motor’s vector control simulation model is built by using Matlab/Simulink, and the results of simulation verified the selected control scheme’s feasibility. Compared with the simulation result of this control program and that of simple PID, which has demonstrated that the system response time was reduced 40%, the overshoot was decreased 3.5% and the torque disturbance was dropped 30%. This shows that the fuzzy PID control is effective to improve the accuracy, sensitivity and robustness of the control system.
