Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics

In order to make a piezoelectric vibration energy harvester collect more energy on a broader frequency range, nonlinearity is introduced into the system, allowing the harvester to produce multiple steady states and deflecting the frequency response curve. However, the harvester can easily maintain i...

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Autores principales:	Zhang Qichang, Yang Yang, Wang Wei
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	strong nonlinearity piezoelectric vibration energy harvester primary resonance subharmonic resonance bandwidth complex dynamic frequency (CDF) method Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/817a178b11c04aeaa369cb6cdf72bd38
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spelling	oai:doaj.org-article:817a178b11c04aeaa369cb6cdf72bd382021-11-25T18:22:56ZTheoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics10.3390/mi121113012072-666Xhttps://doaj.org/article/817a178b11c04aeaa369cb6cdf72bd382021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1301https://doaj.org/toc/2072-666XIn order to make a piezoelectric vibration energy harvester collect more energy on a broader frequency range, nonlinearity is introduced into the system, allowing the harvester to produce multiple steady states and deflecting the frequency response curve. However, the harvester can easily maintain intra-well motion rather than inter-well motion, which seriously affects its efficiency. The aim of this paper is to analyze how to take full advantage of the nonlinear characteristics to widen the bandwidth of the piezoelectric vibration energy harvester and obtain more energy. The influence of the inter-permanent magnet torque on the bending of the piezoelectric cantilever beam is considered in the theoretical modeling. The approximate analytical solutions of the primary and 1/3 subharmonic resonance of the harvester are obtained by using the complex dynamic frequency (CDF) method so as to compare the energy acquisition effect of the primary resonance and subharmonic resonance, determine the generation conditions of subharmonic resonance, and analyze the effect of primary resonance and subharmonic resonance on broadening the bandwidth of the harvester under different external excitations. The results show that the torque significantly affects the equilibrium point and piezoelectric output of the harvester. The effective frequency band of the bistable nonlinear energy harvester is 270% wider than that of the linear harvester, and the 1/3 subharmonic resonance broadens the band another 92% so that the energy harvester can obtain more than 0.1 mW in the frequency range of 18 Hz. Therefore, it is necessary to consider the influence of torque when modeling. The introduction of nonlinearity can broaden the frequency band of the harvester when it is in primary resonance, and the subharmonic resonance can make the harvester obtain more energy in the global frequency range.Zhang QichangYang YangWang WeiMDPI AGarticlestrong nonlinearitypiezoelectric vibration energy harvesterprimary resonancesubharmonic resonancebandwidthcomplex dynamic frequency (CDF) methodMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1301, p 1301 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	strong nonlinearity piezoelectric vibration energy harvester primary resonance subharmonic resonance bandwidth complex dynamic frequency (CDF) method Mechanical engineering and machinery TJ1-1570
spellingShingle	strong nonlinearity piezoelectric vibration energy harvester primary resonance subharmonic resonance bandwidth complex dynamic frequency (CDF) method Mechanical engineering and machinery TJ1-1570 Zhang Qichang Yang Yang Wang Wei Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics
description	In order to make a piezoelectric vibration energy harvester collect more energy on a broader frequency range, nonlinearity is introduced into the system, allowing the harvester to produce multiple steady states and deflecting the frequency response curve. However, the harvester can easily maintain intra-well motion rather than inter-well motion, which seriously affects its efficiency. The aim of this paper is to analyze how to take full advantage of the nonlinear characteristics to widen the bandwidth of the piezoelectric vibration energy harvester and obtain more energy. The influence of the inter-permanent magnet torque on the bending of the piezoelectric cantilever beam is considered in the theoretical modeling. The approximate analytical solutions of the primary and 1/3 subharmonic resonance of the harvester are obtained by using the complex dynamic frequency (CDF) method so as to compare the energy acquisition effect of the primary resonance and subharmonic resonance, determine the generation conditions of subharmonic resonance, and analyze the effect of primary resonance and subharmonic resonance on broadening the bandwidth of the harvester under different external excitations. The results show that the torque significantly affects the equilibrium point and piezoelectric output of the harvester. The effective frequency band of the bistable nonlinear energy harvester is 270% wider than that of the linear harvester, and the 1/3 subharmonic resonance broadens the band another 92% so that the energy harvester can obtain more than 0.1 mW in the frequency range of 18 Hz. Therefore, it is necessary to consider the influence of torque when modeling. The introduction of nonlinearity can broaden the frequency band of the harvester when it is in primary resonance, and the subharmonic resonance can make the harvester obtain more energy in the global frequency range.
format	article
author	Zhang Qichang Yang Yang Wang Wei
author_facet	Zhang Qichang Yang Yang Wang Wei
author_sort	Zhang Qichang
title	Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics
title_short	Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics
title_full	Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics
title_fullStr	Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics
title_full_unstemmed	Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics
title_sort	theoretical study on widening bandwidth of piezoelectric vibration energy harvester with nonlinear characteristics
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/817a178b11c04aeaa369cb6cdf72bd38
work_keys_str_mv	AT zhangqichang theoreticalstudyonwideningbandwidthofpiezoelectricvibrationenergyharvesterwithnonlinearcharacteristics AT yangyang theoreticalstudyonwideningbandwidthofpiezoelectricvibrationenergyharvesterwithnonlinearcharacteristics AT wangwei theoreticalstudyonwideningbandwidthofpiezoelectricvibrationenergyharvesterwithnonlinearcharacteristics
_version_	1718411268905238528

Theoretical Study on Widening Bandwidth of Piezoelectric Vibration Energy Harvester with Nonlinear Characteristics

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