Experimental verification of a bridge-shaped, nonlinear vibration energy harvester
Name
APL Giacomo.pdf
Size
3.42 MB
Format
Adobe PDF
Checksum (MD5)
d8804dd9a724237b3ef17f360dc72c1f
Author(s)
Gafforelli, Giacomo
Corigliano, Alberto
Xu, Ruize
Kim, Sang-Gook
Date Issued
November 2014
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Gafforelli, Giacomo, Alberto Corigliano, Ruize Xu, and Sang-Gook Kim. “Experimental Verification of a Bridge-Shaped, Nonlinear Vibration Energy Harvester.” Applied Physics Letters 105, no. 20 (November 17, 2014): 203901. © 2014 AIP Publishing LLC
Version
Final published version
Abstract
This paper reports a comprehensive modeling and experimental characterization of a bridge shaped nonlinear energy harvester. A doubly clamped beam at large deflection requires stretching strain in addition to the bending strain to be geometrically compatible, which stiffens the beam as the beam deflects and transforms the dynamics to a nonlinear regime. The Duffing mode non-linear resonance widens the frequency bandwidth significantly at higher frequencies than the linear resonant frequency. The modeling includes a nonlinear measure of strain coupled with piezoelectric constitutive equations which end up in nonlinear coupling terms in the equations of motion. The main result supports that the power generation is bounded by the mechanical damping for both linear and nonlinear harvesters. Modeling also shows the power generation is over a wider bandwidth in the nonlinear case. A prototype is manufactured and tested to measure the power generation at different load resistances and acceleration amplitudes. The prototype shows a nonlinear behavior with well-matched experimental data to the modeling.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/1.4902116
