Multi-region Fuzzy Tracking Control for a Pneumatic Servo Squeezing Forces System

A multi-region fuzzy tracking control approach was used to control a pneumatic servo squeezing forces system with unknown non-linearity and frequently changing process dynamics in this paper, using the E/P proportional pressure valve as the electro-pneumatic converter in constructing the electro-pneumatic automatic squeezing pressure servo system. The squeezing pressure process is firstly divided into different fuzzy regions according to the operating behavior of the system. Then, using a process auxiliary variable to detect the squeezing pressure operating region, the fuzzy controller is designed based on the regional information. The results of this test show that this scheme can effectively overcome unknown nonlinear influence of the system, and has high control precision and robustness.