Publication: Correction modeling of piezoelectric material non-linear behaviours in actuator
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Date
2023-07-13
Authors
Chang, Yan Yee
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Abstract
Piezoelectric actuators are progressively playing a significant role in precision positioning applications due to their incredibly fine resolution, quick reactions, and strong actuation forces. However, the existence of nonlinear behaviours such as hysteresis, creep, saturation, and uncertainty in vibration make big influences on their positioning accuracies. According to previous studies, the hysteresis effect, which causes the piezoelectric actuator's output displacement to vary over measurement series, is one of the nonlinear relationships that occur within the piezoelectric actuator. Additionally, the creeping effect is now an instant discovery anytime the majority of hysteresis loops are recorded. The piezoelectric actuator also has other nonlinear relationships, such as saturation effect and uncertainty vibration. The Prandtl-Ishlinski and Preisach models are among the mathematical methods which have been used extensively to simulate and conjugate these nonlinearities effects. Instead of employing polynomial-based functions, where this technique is able to directly represent as well as invert the effect of nonlinearity, these methods are highly complex. To get high positioning accuracies, correction modelling and control of piezoelectric actuators are meaningful and necessary. In this study, a polynomial function-based corrective modelling for hysteresis, creep, saturation, and uncertainty vibration was developed and its correction impact was then simulated using MATLAB and Simulink software in MATLAB. From the results, it was observed that the corrected model of the piezoelectric actuator produced a better displacement output compared to the non-linear model. However, it is quite difficult to obtain the similar results on the Simulink and the prediction model as the model had been simplified. An improved Simulink model with more complexity on the non-linear behaviour can be constructed in future study.