中文说明：
利用Matlab 的Simulink工具箱设计一个控制系统框图，本设计的主要内容是双闭环直流电机调速系统的动态结构框图，本设计基于大学本科“电机拖动与运动控制”课程中双闭环直流电机调速系统的模型设计，建模仿真结果与教材理论分析结果相同。
English Description：
A control system block diagram is designed by using the Simulink toolbox of MATLAB. The main content of this design is the dynamic structure block diagram of double closed-loop DC motor speed regulation system. This design is based on the model design of double closed-loop DC motor speed regulation system in the undergraduate course "motor drive and motion control". The modeling and simulation results are the same as the theoretical analysis results of teaching materials