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Exploiting Elastically Supported Masses in Cantilever for Resonance Frequencies Down-Shifted Vibration Energy Harvester

1
School of Aerospace Science and Technology, Xidian University, Xi’an 710071, China
2
School of Electro-Mechanical Engineering, Xidian University, Xi’an 710071, China
*
Author to whom correspondence should be addressed.
Energies 2019, 12(11), 2207; https://doi.org/10.3390/en12112207
Received: 29 April 2019 / Revised: 4 June 2019 / Accepted: 6 June 2019 / Published: 10 June 2019
(This article belongs to the Special Issue Modeling and Analysis of Energy Harvesters)
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Abstract

This paper presents a piezoelectric vibration energy harvester (PVEH) with resonance frequencies shifted down by elastically supported masses. The added elastic supporters can diminish the equivalent stiffness of the whole structure, leading to an evident decline in the resonance frequency of the cantilever body. Meantime, a new resonant peak is generated in the lower frequency range. The resonant frequency of the proposed PVEH can be easily adjusted by replacing the rubber band of the elastic support. The constructed configuration is theoretically investigated and experimentally verified. Compared with the conventional cantilever, the proposed device achieved a 46% decrease in resonance frequency and 87% enhancement in output power. View Full-Text
Keywords: piezoelectric; vibration energy harvester; elastically supported masses; resonance frequencies shifted down piezoelectric; vibration energy harvester; elastically supported masses; resonance frequencies shifted down
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wang, H.; Li, B.; Liu, Y.; Zhang, M.; Zhao, W.; Qin, H. Exploiting Elastically Supported Masses in Cantilever for Resonance Frequencies Down-Shifted Vibration Energy Harvester. Energies 2019, 12, 2207.

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