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

Uchenna Diala, Yunpeng Zhu, Rajintha Gunawardena

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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.
Original languageEnglish
Article number30
Number of pages21
JournalMachines
Volume12
Issue number1
DOIs
Publication statusPublished - 1 Jan 2024

Bibliographical note

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/

Keywords

  • nonlinear systems
  • vibration energy harvester (VEH)
  • Output Frequency Response Function (OFRF
  • Generalised Associated Linear Equations (GALEs)
  • frequency domain

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