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Proceedings Paper

Displacement models for THUNDER actuators having general loads and boundary conditions
Author(s): Robert Wieman; Ralph C. Smith; Tyson Kackley; Zoubeida Ounaies; Jeffrey D. Bernd
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Paper Abstract

This paper summarizes techniques for quantifying the displacements generated in THUNDER actuators in response to applied voltages for a variety of boundary conditions and exogenous loads. The PDE models for the actuators are constructed in two steps. In the first, previously developed theory quantifying thermal and electrostatic strains is employed to model the actuator shapes which result from the manufacturing process and subsequent repoling. Newtonian principles are then employed to develop PDE models which quantify displacements in the actuator due to voltage inputs to the piezoceramic patch. For this analysis, drive levels are assumed to be moderate so that linear piezoelectric relations can be employed. Finite element methods for discretizing the models are developed and the performance of the discretized models are illustrated through comparison with experimental data.

Paper Details

Date Published: 21 August 2001
PDF: 12 pages
Proc. SPIE 4326, Smart Structures and Materials 2001: Modeling, Signal Processing, and Control in Smart Structures, (21 August 2001);
Show Author Affiliations
Robert Wieman, North Carolina State Univ. (United States)
Ralph C. Smith, North Carolina State Univ. (United States)
Tyson Kackley, North Carolina State Univ. (United States)
Zoubeida Ounaies, NASA Langley Research Ctr. (United States)
Jeffrey D. Bernd, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 4326:
Smart Structures and Materials 2001: Modeling, Signal Processing, and Control in Smart Structures
Vittal S. Rao, Editor(s)

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