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Pneumatic control valves in practice are usually composed of three signal conversion processes that are associated with significant nonlinearities and dynamics. However, several physical, semi-physical, and data-driven models in the literature describe only one signal conversion process from the actuator force to the valve stem position. In this paper, a semi-physical model is proposed based on the...
This paper introduces Preisach model to describe hysteretic input nonlinearities of extended Hammerstein systems. Preisach model is proved to be an effective model to cover most of hysteretic input nonlinearities studied in the existing literatures on identification of extended Hammerstein systems. That is, Preisach model encloses the backlash-type nonlinearities and the hysteresis-relay nonlinearities...
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