Modeling of a Nonlinear Vibration-Based Energy Harvesting System as a Duffing Oscillator

Abstract:

The harvesting of ambient energy has become more important over the last years. This paper will investigate an analytical effort to predict the Duffing parameters for a magnetoelastic cantilever structure. The modeling is compared to a nonlinear harvester with point dipoles. The system consists of a harmonic excited cantilever structure with a magnetic tip mass. The beam is firmly clamped to the host structure. A second oppositely poled permanent magnet is located near the free end of the beam. The system is a bistable nonlinear oscillator with two equilibrium positions. Several studies show the better performance of the setup. The approach is not limited for energy harvesting techniques. The setup is suitable for broadband oscillations and also to tune the resonant frequency closer to the excitation frequency.

• Periodical: Solid State Phenomena (Volume 198)
• Pages: 663-668
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.198.663
• Online since: March 2013
• Authors: Henrik Westermann, Marcus Neubauer, Jörg Wallaschek
• Keywords: Duffing Oscillator, Nonlinear Vibrations, Piezomagnetoelastic Energy Harvesting

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