解耦，恢复原信号，用于时频分析算法，IMC-PID是利用内模控制原理来对PID参数进行计算，采用累计贡献率的方法，仿真效果非常好。- Decoupling, restore the original signal, For time-frequency analysis algorithm, The IMC- PID is using the internal model control principle for PID parameters is calculated, The method