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Proceedings Paper

Optimization of piezoelectric bistable composite plates for broadband vibrational energy harvesting
Author(s): David N. Betts; H. Alicia Kim; Christopher R. Bowen; Daniel J. Inman
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Paper Abstract

This paper presents a unique arrangement of bistable composite plates with piezoelectric patches bonded to its surface to perform broadband vibration-based energy harvesting from ambient mechanical vibrations. These bistable nonlinear devices have been shown to have improved power generation compared to conventional resonant systems and can be designed to occupy smaller volumes than bistable magnetic cantilever systems. This paper presents the results of an optimization study of bistable composites that are capable of generating greater electrical power from a smaller space by discovering the correct geometric configuration for energy harvesting. Optimum solutions are investigated in a series of design parameter studies intended to reveal the complex interactions of the physical constraints and design requirements. The proposed approach considers the optimal choice of device aspect ratio, thickness, laminate stacking sequence, and piezoelectric surface area. Increased electrical output is found for geometries and piezoelectric configurations which have not been considered previously.

Paper Details

Date Published: 27 March 2012
PDF: 9 pages
Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 83412Q (27 March 2012); doi: 10.1117/12.930138
Show Author Affiliations
David N. Betts, Univ. of Bath (United States)
H. Alicia Kim, Univ. of Bath (United States)
Christopher R. Bowen, Univ. of Bath (United States)
Daniel J. Inman, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 8341:
Active and Passive Smart Structures and Integrated Systems 2012
Henry A. Sodano, Editor(s)

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