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Proceedings Paper

Static analysis of an artificial muscle system based on PZT strain amplification
Author(s): Thomas W. Secord; Jun Ueda; H. Harry Asada
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Paper Abstract

In this paper the design and static analysis of a novel artificial muscle system are presented. The proposed design is based on exponential strain amplification applied to PZT stack actuators. Exponential strain amplification is achieved by means of a nested cellular architecture. The primary limitation of the nested strain amplification mechanisms is the loss of blocking force due to structural compliance. Therefore, to quantify and improve the performance of the design, analytical expressions are obtained for the blocking force and free displacement of two separate amplification mechanisms using Castigliano's strain energy and displacement theorem. Measured values for blocking force and free displacement validate the static behavior predicted by the solid mechanics. Design implications for the amplification mechanisms are then enumerated based on the theoretical modeling.

Paper Details

Date Published: 8 April 2008
PDF: 12 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69323L (8 April 2008); doi: 10.1117/12.775868
Show Author Affiliations
Thomas W. Secord, Massachusetts Institute of Technology (United States)
Jun Ueda, Massachusetts Institute of Technology (United States)
NARA Institute of Science and Technology (Japan)
H. Harry Asada, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

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