Liquid level control of coupled tank system using Fractional PID controller
نویسندگان
چکیده
In process industries PID controllers are used more. In PID controller we have three parameters for tuning and tuning is done by using Ziegler-Nicholas method. In this paper we used fractional PID controller for coupled tank system and by using a tuning method for getting required response. First used zieglar-nicholas and Astrom-Hagglund method for tuning, then derived two non-linear equations and then solve these equations to find fractional order of the derivative and integral terms. In this paper we used a optimization strategy to obtained required step response of given process. Keywords—FOPID, PID, SISO, fractional order controllers.
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