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Hysteresis Analysis of PLZT Actuator Based on the Photovoltaic Effect and the Viscoelastic Effect

[+] Author Affiliations
J. H. Huang, X. J. Wang, J. Wang

Nanjing University of Science and Technology, Nanjing, China

Paper No. SMASIS2013-3097, pp. V001T03A019; 6 pages
doi:10.1115/SMASIS2013-3097
From:
  • ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Integrated System Design and Implementation
  • Snowbird, Utah, USA, September 16–18, 2013
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-5603-1
  • Copyright © 2013 by ASME

abstract

Compared with the traditional actuators, the photostrictive actuators have huge advantages in applying in the hostile environments. The cantilever structure made of PLZT bimorph is used to increase the mechanical displacement because of the smaller photostrictive displacement of one PLZT patch. However, when one side of the PLZT bimorph was irradiated by the ultraviolet light with wavelength of 365nm, the response of the photodeformation is far slower than the photovoltage and the photocurrent, which prevents it from using in the high-frequency dynamic applications. In this study, a novel mathematical model of PLZT patch based on the photovoltaic effect and viscoelastic effect was proposed. And the tip deflection equation of PLZT bimorph was derived by the linear theory of viscoelasticity and constitutive relations of PLZT. And then the factors influencing the tip deflection were obtained by using the numerical analysis. Simultaneously, the hysteresis phenomenon of PLZT patch was explained.

Copyright © 2013 by ASME
Topics: Actuators

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