Modeling and experiment of a piezoelectric energy harvester with wide operation bandwidth

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (24) : 27-32.

Liu Shaogang, Cheng Qianju, Zhao Dan, Feng Lifeng

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Abstract

A novel two-degree-of-freedom piecewise-linear piezoelectric energy harvester was proposed to achieve wide operation frequency bandwidth. The theoretical model was established and the analytical solutions were given for the further optimize design and microminiaturization fabricating of the proposed device. Through the prototype fabricating and the experiment platform building, the experiment results were obtained. The analytical results and experiment results showed that The operation frequency bandwidths of the proposed device in the first resonance region and in the second resonance region were 2.2Hz and 4.5Hz respectively, the total bandwidth was 6.7Hz, which reached as 4.78 times as the corresponding linear system. Within the margin of error, the analytical solutions were close to the experiment results, and the proposed device could extend the bandwidth of the operation frequency efficiently.

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piecewise-linear / two-degree-of-freedom / bandwidth extending / piezoelectric / energy harvester

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Liu Shaogang, Cheng Qianju, Zhao Dan, Feng Lifeng. Modeling and experiment of a piezoelectric energy harvester with wide operation bandwidth[J]. Journal of Vibration and Shock, 2016, 35(24): 27-32

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