Parallel distributed compensator design for process control based on fuzzy Takagi-Sugeno model

摘要

In this paper, a fuzzy controller is designed based on Parallel Distributed Compensation (PDC) method and it is implemented in an experimental tank level control system. Firstly, a mathematical model of the system is obtained experimentally. To control the level of water in the tank over the whole range, the nonlinear model of the system is linearized around three different operating points. Then, three PI controllers are designed for the operating points. By using the PDC method, an overall fuzzy controller is designed by the fuzzy blending of the three PI-controllers. To evaluate the practical performance of the PDC-based fuzzy controller, the control system is implemented in the experimental system. The comparison results showed the superiority of the PDC-controller over the classical PI-controller.