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Proceedings Paper

Analysis of a smart linear piezoelectric transducer
Author(s): Keith A. Seffen
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Paper Abstract

A preliminary investigation of a novel transducer proposed for digital loudspeaker technology is presented. The transducer comprises a piezoelectric, helicoidal structure that wraps round an inflated, elastomeric torus with a lightweight cylindrical core element mounted on the inside. As the helix is deformed by application of an electric field along its length, linear motion of the core is actuated. An axisymmetric finite-element model is presented to account for inflation of the torus against the outer helix and to demonstrate core motion. The interaction of surfaces in contact is studied in a hyperelastic framework using a double cylinder model, which produces favorable predictions of the actuating forces from finite element analysis. A finite-element model of the helix demonstrates primary aspects of deformation that are utilized in formulating a much simpler single-layer analysis by a variational strain-energy approach; a correlation to experiment is observed.

Paper Details

Date Published: 22 June 2000
PDF: 12 pages
Proc. SPIE 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems, (22 June 2000); doi: 10.1117/12.388862
Show Author Affiliations
Keith A. Seffen, Univ. of Manchester (United Kingdom)

Published in SPIE Proceedings Vol. 3985:
Smart Structures and Materials 2000: Smart Structures and Integrated Systems
Norman M. Wereley, Editor(s)

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