说明：  为在“自动控制原理”课程中直观地讲解PID控制中各参数对系统性能的影响，设计了基于MATLAB GUI的PID控制仿真系统。该仿真控制系统可以通过直接输入和从工作空间获取两种方式获取数据，并实现PID参数的动态调整、控制系统动态性能参数及对应单位阶跃响应曲线的绘制等功能
(In order to explain the effects of various parameters in PID control on system performance in the course of "Automatic Control Principles", a PID control simulation system based on MATLAB GUI was designed. The simulation control system can obtain data through two methods: direct input and acquisition from the working space, and realize the dynamic adjustment of PID parameters, the dynamic performance parameters of the control system, and the drawing of the corresponding unit step response curve.)