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A two-stage decoupling identification method is developed for Hammerstein system containing the threshold-discrete Prandtl-Ishlinskii (TDPI) operator with non-local memories. In the first stage, a persistently exciting input is designed so that the linear subsystem can be made decoupled from the nonlinear element and linear subsystem identification is coped with using a least squares estimator. Then,...
Piezoelectric actuator has been frequently utilized in the micromanipulation control. However, the rate-dependent hysteresis properties in the actuator affect severely the high precision tracking control. In this study, a Hammerstein-based model with Bouc-Wen hysteresis nonlinearity is proposed to describe the dynamic characteristics of rate-dependent hysteresis in a piezoelectric actuator. The Bouc-Wen...
A Bouc-Wen model and parameter identification method is presented to describe the hysteresis characteristics in a piezoelectric actuator. Based on the model, a new feedback control scheme with a hysteresis compensator is proposed for the precise tracking control of the piezoelectric actuator. To verify the efficiency of the proposed control method, an experimental study in a piezoelectric actuator...
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