中文说明：
连续系统灰色PID的位置跟踪，先是采用PID控制进行灰色预测，然后采用带有灰色估计器的补偿PID控制。
English Description：
In order to track the position of continuous system with grey PID, the grey prediction is carried out by PID control, and then the compensation PID control with grey estimator is adopted.