Abstract
The nonlinear dynamics of a two-degree-of-freedom (2-DOFs) vibrating energy harvester (VEH) based on magnetic levitation is modeled and investigated. The equations of motion have been derived while taking into account the magnetic nonlinearity and the electro-magnetic damping. The associated linear eigenvalue problem has been analyzed and optimality conditions have been expressed in term of distance minimization between the two eigenfrequencies of the considered system. The resulting optimal design parameters have been substituted into the coupled nonlinear equations of motion which have been numerically solved. It is shown that the performances of a classical single degree of freedom VEH can be significantly enhanced up to 270 % in term of power density, up to 34 % in term of frequency bandwidth and up to 10 % in term of resonance frequency attenuation.
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© 2015 The Society for Experimental Mechanics, Inc.
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Abed, I., Kacem, N., Bouazizi, M.L., Bouhaddi, N. (2015). Nonlinear 2-DOFs Vibration Energy Harvester Based on Magnetic Levitation. In: Wicks, A. (eds) Shock & Vibration, Aircraft/Aerospace, and Energy Harvesting, Volume 9. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-15233-2_5
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DOI: https://doi.org/10.1007/978-3-319-15233-2_5
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-15232-5
Online ISBN: 978-3-319-15233-2
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