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

Hai Wang, Bin Li, Yan Liu, Min Zhang, Wei Zhao and Hongbo Qin
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Hai Wang: School of Aerospace Science and Technology, Xidian University, Xi’an 710071, China
Bin Li: School of Aerospace Science and Technology, Xidian University, Xi’an 710071, China
Yan Liu: School of Electro-Mechanical Engineering, Xidian University, Xi’an 710071, China
Min Zhang: School of Aerospace Science and Technology, Xidian University, Xi’an 710071, China
Wei Zhao: School of Electro-Mechanical Engineering, Xidian University, Xi’an 710071, China
Hongbo Qin: School of Electro-Mechanical Engineering, Xidian University, Xi’an 710071, China

Energies, 2019, vol. 12, issue 11, 1-8

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.

Keywords: piezoelectric; vibration energy harvester; elastically supported masses; resonance frequencies shifted down (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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