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