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A generalized Prandtl-Ishlinskii model is proposed for characterizing rate-dependent hysteresis of Giant Magnetostrictive Actuator (GMA). A generalized play operator with rate-dependent envelope function is integrated into generalized Prandtl-Ishlinskii model to describe the rate-dependent effects of GMA. Good agreements are shown between simulation results and experimental data including major and...
To deal with the rate-dependent hysteresis, this paper proposes a Hammerstein-like system based on Fuzzy Tree method (FT) and the validity is verified by experimental data. Based on the proposed model, a PID feedback controller combined with nonlinearity inverse compensation in feedforward loop is used for tracking control. Numerical simulation shows that the control method is effective.
Due to high output force and great displacement, Giant Magnetostrictive Actuator (GMA) has a wide application including microposition and active vibration control. However, the inherent hysteresis nonlinearity of GMA impacts severely the stability and precision of the system; especially the complex hysteresis nonlinearity is stress-dependent. Based on the Modified Prandtl-Ishlinskii (MPI) model and...
Considering of the problem that the online training for the standard least squares support vector machine (LS-SVM) is difficult, an new learning algorithm of online least squares support vector machine regression (OLS-SVMR) based rectangular window with forgetting factor (RWFF) algorithm is proposed, by combining the RWFF algorithm with support vector machine, the present and past window data are...
The noise and vibration cancellation is important for precise control, especially for aeronautics, astronautics and advanced manufacture. A low order H∞robust controller is designed for the active vibration control by using the magnetostrictive actuator. XY-centering algorithm is employed to design the low order H∞robust controller. The numerical simulation solution shows the vibration is reduced...
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