中文说明：
在Matlab/Simulink中搭建的步进电机、单相异步电机、直流无刷电机三种驱动系统的仿真模型，来对比仿真其速度响应动态性能。
English Description：
The simulation models of stepping motor, single-phase asynchronous motor and brushless DC motor are built in Matlab / Simulink to compare and simulate the dynamic performance of speed response.