Snap-through piezoelectric energy harvesting

被引：81

作者：

Jiang, Wen-An ^{[1
]}

Chen, Li-Qun ^{[1
,2
,3
]}

机构：

[1] Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai 200072, Peoples R China

[2] Shanghai Univ, Dept Mech, Shanghai 200444, Peoples R China

[3] Shanghai Univ, Shanghai Key Lab Mech Energy Engn, Shanghai 200072, Peoples R China

来源：

JOURNAL OF SOUND AND VIBRATION | 2014年 / 333卷 / 18期

关键词：

VIBRATION;

D O I：

10.1016/j.jsv.2014.04.035

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Snap-through mechanism is employed to harvest electricity from random vibration through piezoelectricity. The random excitation is assumed to be Gaussian white noise. The snap-through piezoelectric energy harvester possesses the bistability. For small-amplitude vibration in a potential well, the Ito stochastic differential equation of the electromechanical coupling system is derived from the Taylor approximation at a stable equilibrium point. The method of the moment differential equations is applied to determine the statistical moments of the displacement response and the output voltage. The effects of the system parameters on the output voltage and the output power are examined. The approximate analytical outcomes are qualitatively and quantitatively supported by the numerical simulations. For large-amplitude interwell motion, the effects of the parameters on the output voltage and the output power are numerically investigated. Nonlinearity produced by the snap-through improves energy harvesting so that the snap-through piezoelectric energy harvester can outperform the linear energy harvester in the similar size under Gaussian white noise excitations. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：4314 / 4325

页数：12

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