CLC number: TM619; TN384
On-line Access: 2012-07-03
Received: 2011-12-17
Revision Accepted: 2012-05-07
Crosschecked: 2012-05-29
Cited: 17
Clicked: 6799
Hong-yan Wang, Xiao-biao Shan, Tao Xie. An energy harvester combining a piezoelectric cantilever and a single degree of freedom elastic system[J]. Journal of Zhejiang University Science A, 2012, 13(7): 526-537.
@article{title="An energy harvester combining a piezoelectric cantilever and a single degree of freedom elastic system",
author="Hong-yan Wang, Xiao-biao Shan, Tao Xie",
journal="Journal of Zhejiang University Science A",
volume="13",
number="7",
pages="526-537",
year="2012",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1100344"
}
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%A Tao Xie
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1100344
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T1 - An energy harvester combining a piezoelectric cantilever and a single degree of freedom elastic system
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A1 - Xiao-biao Shan
A1 - Tao Xie
J0 - Journal of Zhejiang University Science A
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%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1100344
Abstract: This paper presents a type of vibration energy harvester combining a piezoelectric cantilever and a single degree of freedom (SDOF) elastic system. The main function of the additional SDOF elastic system is to magnify vibration displacement of the piezoelectric cantilever to improve the power output. A mathematical model of the energy harvester is developed based on Hamilton’s principle and Rayleigh-Ritz method. Furthermore, the effects of the structural parameters of the SDOF elastic system on the electromechanical outputs of the energy harvester are analyzed numerically. The accuracy of the output performance in the numerical solution is identified from the finite element method (FEM). A good agreement is found between the numerical results and FEM results. The results show that the power output can be increased and the frequency bandwidth can be improved when the SDOF elastic system has a larger lumped mass and a smaller damping ratio. The numerical results also indicate that a matching load resistance under the short circuit resonance condition can obtain a higher current output, and so is more suitable for application to the piezoelectric energy harvester.
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