An elastic-support model for enhanced bistable piezoelectric energy harvesting from random vibrations

被引：74

作者：

Leng, Y. G. ^{[1
,2
]}

Gao, Y. J. ^{[1
]}

Tan, D. ^{[1
]}

Fan, S. B. ^{[1
]}

Lai, Z. H. ^{[1
]}

机构：

[1] Tianjin Univ, Dept Mech Engn, Tianjin 200072, Peoples R China

[2] Tianjin Univ, Key Lab Mech Theory & Equipment Design, Minist Educ, Tianjin 300072, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 117卷 / 06期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

Energy harvesting - Piezoelectricity;

D O I：

10.1063/1.4907763

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

To overcome the defect of conventional nonlinear piezoelectric cantilever vibration energy harvesters, in this paper we conceive an elastic-support model to study the performance of energy converters under two types of variable-intensity excitation conditions: filtered Gaussian noises and pink noises. When excitation intensity is insufficient, thanks to the system's variable potential function, frequent bistable transition oscillations between two wells occur in elastic-support systems, while only weak oscillations in either well could be observed in rigid-support systems. In practical applications, the structural parameters of energy harvesters are not allowed to make real-time changes. If considered remaining the magnet interval and the spring's elastic stiffness unchanged while receiving stable maximum output voltage, elastic-support systems can be made full use toward variable-intensity filtered Gaussian noises. It has been proven that elastic-support systems are capable of adapting to random excitations with variable intensity, through which maximum power output and sufficient electromechanical energy conversion of the system can be accomplished. (C) 2015 AIP Publishing LLC.

引用

页数：12