Comparing linear and essentially nonlinear vibration-based energy harvesting

D. Dane Quinn, Angela L. Triplett, Lawrence A. Bergman, Alexander F. Vakakis

Research output: Contribution to journalArticle

Abstract

This work considers the performance of a resonant vibration-based energy harvesting system utilizing a strongly nonlinear attachment. Typical designs serving as the basis for harvesting energy from ambient vibration typically employ a linear oscillator for this purpose, limiting peak harvesting performance to a narrow band of frequencies about the resonant frequency of the oscillator. Herein, in an effort to maximize performance over the broader band of frequency content typically observed in ambient vibration measurements, we employ an essentially nonlinear cubic oscillator in the harvesting device and show that, with proper design, significant performance gains can be realized as compared with a tuned linear attachment. However, we also show that the coexistence of multiple equilibria due to the nonlinearity can degrade system performance, as the system can be attracted to a low amplitude state that provides reduced harvested power. Finally, when multiple equilibria exist in the system, the basins of attraction for the stable states are determined and related to the expected response of the system.

Original languageEnglish (US)
Article number011001
JournalJournal of Vibration and Acoustics, Transactions of the ASME
Volume133
Issue number1
DOIs
StatePublished - Jan 1 2011

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

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