NDLI: Harvesting Energy From the Nonlinear Oscillations of a Bistable Piezoelectric Inertial Energy Generator

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Samuel, C. Stanton Brian, P. Mann
Copyright Year	2009
Abstract	Piezoelectric materials constitute an efficient transduction medium for passive power generation from ambient vibrations. As such, the unimorph and bimorph piezoelectric laminate linear beam is a prolifically researched energy harvesting device. The linear modeling framework is amenable to analytical solutions and frequency matching inertial energy generators to environmental oscillations is a seemingly ideal solution. Realistically, however, environmental disturbances are rarely of one particular frequency and linear oscillators are capable of strong responses only within a limited frequency range about system resonance. In view of these shortcomings, this paper builds upon a new research direction and shift in design philosophy toward purposefully incorporating nonlinearity into energy harvesting systems. In particular, the nonlinear magnetic forces of repulsion are introduced at the free end of a cantilevered bimorph piezoelectric beam, where the separation distance between two opposing permanent magnets doubles as a controllable bifurcation parameter. The numerical results demonstrate the efficacy of the nonlinear responses to yield markedly increased power levels when subject to deterministic excitations of varying forcing frequency and amplitude.
Sponsorship	Design Engineering Division and Computers in Engineering Division
Starting Page	447
Ending Page	456
Page Count	10
File Format	PDF
ISBN	9780791848982
DOI	10.1115/DETC2009-86902
e-ISBN	9780791838563
Volume Number	Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
Conference Proceedings	ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Language	English
Publisher Date	2009-08-30
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Vibration Oscillations Bifurcation Generators Energy / power systems Permanent magnets Energy harvesting Laminates Separation (technology) Modeling Harmonic oscillators Design Piezoelectric materials Energy generation Resonance Excitation Magnetic fields
Content Type	Text
Resource Type	Article

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