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Objective <p>To experimentally investigate the performance of vibration energy harvesting in a nonlinear bi-stable electromagnetic-induced system.</p> Background <p>Nonlinear vibration systems are known to possess a wider bandwidth for effective energy harvesting compared to linear systems. This characteristic enables nonlinear systems to efficiently collect mechanical energy from ambient excitations and convert it into electric energy.</p> Methods <p>The study experimentally investigated the diverse states of nonlinear bi-stable vibration behaviors by observing vibration time responses and frequency responses of the corresponding voltage outputs. A parameter study was conducted by varying excitation frequencies, excitation amplitudes, and degrees of nonlinearity.</p> Results <p>The performance of energy harvesting was evaluated by quantifying two key metrics: effective bandwidth (EB) and outperformance of effective energy harvesting (OEEH) under different states of vibration behaviors. The experimental case study demonstrated that the nonlinear bi-stable energy harvester increased the EB by 82% compared to a linear system</p> Conclusion <p>The nonlinear bi-stable system exhibited a significant advantage in energy harvesting performance, particularly in increasing the effective bandwidth, highlighting its potential for practical applications in ambient energy harvesting.</p>

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Exploring Vibration Response, Effective Bandwidth and Degree of Nonlinearity in Bi-stable Electromagnetic-Induced Energy Harvesters: An Experimental Study

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • T. Y. Wu,
  • C. C. Yeh,
  • P. J. Chao

摘要

Objective

To experimentally investigate the performance of vibration energy harvesting in a nonlinear bi-stable electromagnetic-induced system.

Background

Nonlinear vibration systems are known to possess a wider bandwidth for effective energy harvesting compared to linear systems. This characteristic enables nonlinear systems to efficiently collect mechanical energy from ambient excitations and convert it into electric energy.

Methods

The study experimentally investigated the diverse states of nonlinear bi-stable vibration behaviors by observing vibration time responses and frequency responses of the corresponding voltage outputs. A parameter study was conducted by varying excitation frequencies, excitation amplitudes, and degrees of nonlinearity.

Results

The performance of energy harvesting was evaluated by quantifying two key metrics: effective bandwidth (EB) and outperformance of effective energy harvesting (OEEH) under different states of vibration behaviors. The experimental case study demonstrated that the nonlinear bi-stable energy harvester increased the EB by 82% compared to a linear system

Conclusion

The nonlinear bi-stable system exhibited a significant advantage in energy harvesting performance, particularly in increasing the effective bandwidth, highlighting its potential for practical applications in ambient energy harvesting.