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Title: Modeling, validation, and performance of low-frequency piezoelectric energy harvesters
Authors: Abdelkefi, A.
Barsallo, Nilma
Tang, Lihua
Yang, Yaowen
Hajj, Muhammad R
Keywords: DRNTU::Engineering::Materials::Energy materials
Issue Date: 2014
Source: Abdelkefi, A., Barsallo, N., Tang, L., Yang, Y., & Hajj, M. R. (2014). Modeling, validation, and performance of low-frequency piezoelectric energy harvesters. Journal of intelligent material systems and structures, 25(12), 1429-1444.
Series/Report no.: Journal of intelligent material systems and structures
Abstract: Analytical and finite element electromechanical models that take into account the fact that the piezoelectric sheet does not cover the whole substrate beam are developed. A linear analysis of the analytical model is performed to determine the optimal load resistance. The analytical and finite element models are validated with experimental measurements. The results show that the analytical model that takes into account the fact that the piezoelectric patch does not cover the whole beam predicts accurately the experimental measurements. The finite element results yield a slight discrepancy in the global frequency and a slight overestimation in the value of the harvested power at resonance. On the contrary, using an approximate analytical model based on mode shapes of the full covered beam leads to erroneous results and overestimation of the global frequency as well as the level of harvested power. In order to design enhanced piezoelectric energy harvesters that can generate energy at low-frequency excitations, further analysis is performed to investigate the effects of varying the length of the piezoelectric material on the natural frequency and the performance of the harvester. The results show that there is a compromise between the length of the piezoelectric material, the electrical load resistance, and the available excitation frequency. By quantifying this compromise, we optimize the performance of beam–mass systems to efficiently harvest energy from a specified low frequency of the ambient vibrations.
ISSN: 1530-8138
DOI: 10.1177/1045389X13507638
Rights: © 2014 The Authors (published by SAGE Publications). This is the author created version of a work that has been peer reviewed and accepted for publication in Journal of Intelligent Material Systems and Structures, published by SAGE Publications on behalf of The Authors. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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