通过编写M文件来实现PID控制器的设计，针对不同的控制对象选择设定不同的控制参数，来完成控制目标，使得控制系统达到理想的超调，稳态误差等。-PID controller design to achieve by writing M-files, choose to set a different control parameters for different control objects, to complete the control objectives and control system to achieve the desired overshoot, steady state error.