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Proceedings Paper

Experimental characterization and model validation of the quasi-static performance of piezoceramic telescopic actuators
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Paper Abstract

The piezoelectric telescopic actuation architecture capitalizes upon an internally leveraged amplification technique to produce large actuation forces with amplified displacements. This building-block type actuator consists of interconnected concentric, cascaded cylinders with end cap joints that allow for a telescopic type motion. The internal amplification scheme and building-block nature of the telescopic design allow for efficient, densely packed actuators that yield a high work output for a given volume. This paper presents an experimental investigation of the quasi-static force-deflection performance of three unique telescopic prototypes, each manufactured by different means, from various materials, and in distinct geometries. To accurately predict the observed behavior of this architecture, a full three-dimensional numerical model was constructed for each prototype and was used to revise a previously derived analytical model. These models were refined to include extra compliance factors to account for observed actuation losses, focusing primarily on the bonding layer effects. The revised models captured more accurately the complex actuator behavior observed in the experiments and characterized better the loss mechanisms in the telescopic actuation architecture.

Paper Details

Date Published: 16 August 2001
PDF: 12 pages
Proc. SPIE 4327, Smart Structures and Materials 2001: Smart Structures and Integrated Systems, (16 August 2001);
Show Author Affiliations
Paul W. Alexander, Univ. of Michigan (United States)
Diann E. Brei, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 4327:
Smart Structures and Materials 2001: Smart Structures and Integrated Systems
L. Porter Davis, Editor(s)

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