A modified snap-through mechanism is used in an electromagnetic energy harvester to improve its effectiveness. It mainly comprises three springs that are configured so that the potential energy of the system has two stable equilibrium points. In particular, the small vibration behavior of the harvester around one of the equilibriums is of interest. A multi-scale method（MSM） is used to analyze the frequency response curve. Two snap-through mechanisms are considered. One has both horizontal and vertical springs. The other has only horizontal springs. The frequency response curves of these two classes are compared under the same excitation and electric loading conditions. The latter exhibits more bending of the frequency response curve than the former one. The results are also validated by some numerical work. The averaged power subject to the Gaussian white noise is calculated numerically, and the results demonstrate that bi-stable energy harvesting with only horizontal springs can outperform the mechanism with both horizontal and vertical springs for the same distance between two equilibriums.
类型: 期刊论文
作者: Zeqi LU,Ke LI,Hu DING,Liqun CHEN
来源: Applied Mathematics and Mechanics(English Edition) 2019年01期
年度: 2019
分类: 基础科学,工程科技Ⅱ辑
专业: 机械工业
单位: Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai University,Department of Mechanics, College of Sciences, Shanghai University
基金: Project supported by the State Key Program of National Natural Science of China(No.11232009),the National Natural Science Foundation of China(Nos.11502135 and 11572182),the Innovation Program of Shanghai Municipal Education Commission(No.2017-01-07-00-09-E00019)
分类号: TH112
页码: 167-180
总页数: 14
文件大小: 826K
下载量: 17
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