Investigative Study of the Effect of Damping and Stiffness Nonlinearities on an Electromagnetic Energy Harvester at Low-Frequency Excitations

Journal article


Uchenna Diala, Yunpeng Zhu and Rajintha Gunawardena 2024. Investigative Study of the Effect of Damping and Stiffness Nonlinearities on an Electromagnetic Energy Harvester at Low-Frequency Excitations. Machines. 12 (1), pp. 1-21. https://doi.org/10.3390/machines12010030
AuthorsUchenna Diala, Yunpeng Zhu and Rajintha Gunawardena
Abstract

Ambient vibration energy is widely being harnessed as a source of electrical energy to drive low-power devices. The vibration energy harvester (VEH) of interest employs an electromagnetic transduction mechanism, whereby ambient mechanical vibration is converted to electrical energy. The limitations affecting the performance of VEHs, with an electromagnetic transduction structure, include its operational bandwidth as well as the enclosure-size constraint. In this study, an analysis and design of a nonlinear VEH system is conducted using the Output Frequency Response Function (OFRF) representations of the actual system model. However, the OFRF representations are determined from the Generalised Associated Linear Equation (GALE) decompositions of the system of interest. The effect of both nonlinear damping and stiffness characteristics, to, respectively, extend the average power and operational bandwidth of the VEH device, is demonstrated.

Keywordsambient vibration energy; low-power devices; electromagnetic transduction structure
Year2024
JournalMachines
Journal citation12 (1), pp. 1-21
PublisherMDPI
ISSN2075-1702
Digital Object Identifier (DOI)https://doi.org/10.3390/machines12010030
Web address (URL)https://doi.org/10.3390/machines12010030
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Open
Output statusPublished
Publication dates01 Jan 2024
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Deposited14 Feb 2024
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