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A Specific Methodology of Creep Compensation for piezoelectric Actuators by Open-loop control

Wang, Xuan and Pommier-Budinger, Valérie and Gourinat, Yves A Specific Methodology of Creep Compensation for piezoelectric Actuators by Open-loop control. (2013) In: International Conference on Mechanical Engineering, Materials and Energy (ICMEME 2012), 26 October 2012 - 27 October 2012 (Dalian, China).

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Official URL: https://doi.org/10.4028/www.scientific.net/AMM.281.141


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)
HAL Id:hal-01851680
Audience (journal):International peer-reviewed journal
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Civil Aviation University of China (CHINA)
Laboratory name:
Deposited On:26 Oct 2012 12:30

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