无刷直流电机dsp 分数阶pid预测算法(Based on the analysis the working principle of brushless DC motor and the speed regulating simulation under PI, fractional-order PI (FOPI) and predictive functional control (PFC) strategies, two improved control strategies are proposed in this thesis in order to cope with such drawbacks of PI, FOPI and PFC as the incompact relationship between their parameters option and industrial practice. One is fractional-order PI predictive functional control strategy, and the other one is PI predictive functional control strategy.)