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Pneumatic control valve is the most common automatic instrument in process industry. The control performance of pneumatic control valve not only depends on the parameters of the controller, but also closely relates to the characteristics of the pneumatic control valve. This paper gives out a new method for parameter identification model based on the step response of the control valve system is given, and based on the model parameters this paper gives the calculation method of IMC-PID controller of pneumatic control valve, which proved by simulation and experiments to have fast, accurate and stable control performance.

IMC-PID Controller and the Tuning Method in Pneumatic Control Valve Positioner