Abstract
The nonlinear dynamics of a novel hybrid piezo-electromagnetic vibrating energy harvester is modeled and investigated. The proposed concept takes advantage of the mechanical elasticity of a sandwich PZT/Steel/PZT beam to perform a vertical guidance for a vibrating magnet while combining electromagnetic and piezoelectric transduction techniques at large displacement. We follow the extended Hamilton principle in order to derive the multiphysics continuum problem and discretize it into a finite system of nonlinear ordinary differential equations in time domain using the Galerkin method. The resulting reduced order model is solved numerically using the harmonic balance method coupled with the asymptotic numerical continuation technique. Several numerical simulations have been performed showing that the performances of a classical vibrating energy harvester can be significantly enhanced up to 100% in term of power density and up to 10% in term of frequency bandwidth.
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© 2014 The Society for Experimental Mechanics, Inc.
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Mahmoudi, S., Kacem, N., Bouhaddi, N. (2014). Nonlinear Dynamics of a Hybrid Piezo-Electromagnetic Vibrating Energy Harvester. In: Wicks, A. (eds) Structural Health Monitoring, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-04570-2_5
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DOI: https://doi.org/10.1007/978-3-319-04570-2_5
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