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Proceedings Paper

Modeling and enhancement of piezoelectric power extraction from one-dimensional bending waves
Author(s): S. Tol; F. L. Degertekin; A. Erturk
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Paper Abstract

Vibration-based energy harvesting has been heavily researched over the last decade to enable self-powered small electronic components for wireless applications in various disciplines ranging from biomedical to civil engineering. The existing research efforts in this interdisciplinary field have mostly focused on the harvesting of deterministic or stochastic vibrational energy available at a fixed position in space. Such an approach is convenient to design and employ linear and nonlinear vibration-based energy harvesters, such as base-excited cantilevers with piezoelectric laminates. However, persistent vibrations at a fixed frequency and spatial point, or standing wave patterns, are rather simplified representations of ambient vibrational energy. As an alternative to energy harvesting from spatially localized vibrations and standing wave patterns, this work presents an investigation into the harvesting of one-dimensional bending waves in infinite beams. The focus is placed on the use of piezoelectric patches bonded to a thin and long beam and employed to transform the incoming wave energy into usable electricity while minimizing the traveling waves reflected and transmitted from the harvester domain. To this end, performance enhancement by wavelength matching, resistiveinductive circuits, and a localized obstacle are explored. Electroelastic model predictions and performance enhancement efforts are validated experimentally for various case studies.

Paper Details

Date Published: 1 April 2014
PDF: 17 pages
Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90571C (1 April 2014); doi: 10.1117/12.2045141
Show Author Affiliations
S. Tol, Georgia Institute of Technology (United States)
F. L. Degertekin, Georgia Institute of Technology (United States)
A. Erturk, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9057:
Active and Passive Smart Structures and Integrated Systems 2014
Wei-Hsin Liao, Editor(s)

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