This paper proposes a novel design method to control the opening and closing of a valve connected with a motoroperated valve actuator. In the structure of the proposed controller, a nonlinear gain is connected in series with the linear proportional-derivative controller with a first-order filter in the denominator. The nonlinear gain is described by a simple function of the error between the set-point and the measured output. The controller parameters are optimally tuned using a genetic algorithm (GA) so that a given objective function can be minimized. The stability of the closed-loop system is assessed using the Popov stability criterion. Simulation works are done to validate the effectiveness of the proposed method.
MOV actuator, Nonlinear PD controller, Nonlinear function, Popov criterion.
Yungdeug SON, Gang-Gyoo JIN, "A Nonlinear PD Controller Design and Its Application to MOV Actuators", Studies in Informatics and Control, ISSN 1220-1766, vol. 28(1), pp. 5-12, 2019. https://doi.org/10.24846/v28i1y201901
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