Brushless DC motor speed control based on predictive functional control

Because the DC motor is characterized by multi-variables, nonlinearity, strong coupling and time-varying as well as tradition control method strongly depends on the mathematical model of motor, predictive functional control strategy is proposed to control speed of brushless direct-current motor in the paper. The current-loop adopts PI controller while speed-loop uses predictive functional controller. Simulation result is shown that predictive functional control is characterized by small on-line calculations, simple control and stronger anti-interference, along with the robustness, and good static and dynamic performance, thus the control performance of system is enhanced in general.