Energy harvesting in the super-harmonic frequency region of a twin-well oscillator

R. Masana, Mohammed Daqaq

Research output: Contribution to journalArticle

Abstract

Nonlinear dynamical systems exhibit super-harmonic resonances that can activate large-amplitude motions at fraction integers of the fundamental frequency of the system. Such resonances offer a unique and untapped opportunity for harnessing vibratory energy from excitation sources with low-frequency components. To that end, this paper exploits the super-harmonic frequency bands of a nonlinear twin-well (bi-stable) oscillator for harvesting energy from low-frequency excitations. Theoretical and experimental studies are performed on an axially loaded clamped-clamped piezoelectric beam harvester with bi-stable potential characteristics. Voltage- and power-frequency bifurcation maps are generated near the super-harmonic resonance of order two. It is shown that, for certain base acceleration levels, the harvester can exhibit responses that are favorable for energy harvesting. These include a unique branch of large-orbit periodic inter-well oscillations, coexisting branches of large-orbit solutions, and a bandwidth of frequencies where a unique chaotic attractor exists. In these frequency regions, the harvester can produce power levels at half its fundamental frequency that are comparable to those obtained near the fundamental frequency.

Original languageEnglish (US)
Article number044501
JournalJournal of Applied Physics
Volume111
Issue number4
DOIs
StatePublished - Feb 15 2012

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oscillators
harmonics
energy
low frequencies
orbits
dynamical systems
excitation
integers
bandwidth
oscillations
electric potential

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Energy harvesting in the super-harmonic frequency region of a twin-well oscillator. / Masana, R.; Daqaq, Mohammed.

In: Journal of Applied Physics, Vol. 111, No. 4, 044501, 15.02.2012.

Research output: Contribution to journalArticle

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