Wang, Xuan and Pommier-Budinger, Valérie and Gourinat, Yves A Specific Methodology of Creep Compensation for piezoelectric Actuators by Open-loop control. ( In Press: 2012) In: International Conference on Mechanical Engineering, Materials and Energy (ICMEME 2012), 26-27 Oct 2012, Dalian, China .
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Piezoelectric actuators exhibit creep behavior in open-loop operation, which may lead to unaffordable errors in high precision static positioning systems. An inversion-based compensation strategy by open-loop control is presented for reducing creep effect. The approach utilizes a nonlinear viscoelastic model to portray creep phenomenon, which consists of a linear spring, a nonlinear dashpot and a series of nonlinear Voigt elements. It is shown that for the presented creep model the step responses are very similar to the piezoelectric actuators. In order to compensate creep effect, a concept of voltage relaxation in piezoelectric actuators is proposed. And the voltage relaxation model tantamount to the inverse creep model is derived using a PID closed-loop control system. Experimental results prove that, by insertion of voltage relaxation model in open-loop operation, creep effect is attenuated markedly in piezoelectric actuators.
|Item Type:||Conference or Workshop Item (Paper)|
|Audience (journal):||International peer-reviewed journal|
|Audience (conference):||International conference proceedings|
|Institution:||Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE|
Other partners > Civil Aviation University of China (CHINA)
|Deposited By:||valerie budinger|
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