Application of Internal Model Control in Hydraulic Servo System

Aiming at the complexity of hydraulic vibrancy platform, a PID control method of double closed loop control based on IMC control principle is put forward. It realized the proportion control in inner loop using the anti-interference of the PID control, and the controlled object was transformed into a one-order inertia link with the time-delay unit. After approximating the time-delay unit by the 1/1 Pade method, the low pass filter and PID controller that they are equivalent to IMC controller can be obtained by using IMC control principle to realize outer loop control. Listing some material steps at designing of IMC controller, through the simulation experiment, it shows that the IMC-PID control method is superior to the traditional PID method in anti-interference and robustness, and its application value in projects is very high.