Investigation of the electro-pneumatic position servo system of a proportional valve controlled cylinder based on fuzzy-PI controller

摘要

Using the proportional valve as the electro-pneumatic converter in constructing the electro-pneumatic position servo system and using Fuzzy-PI controller compensating the nonlinear factors in the system are presented in the paper. The real-time control of the piston displacement is implemented. The investigated results show that the method is very feasible. The repetitive positioning accuracy is less than 0.2 mm.