Dynamical model and characteristics of a multi-stable piezoelectric vibration energy harvester

被引：0
|
作者：
Wang G.-Q. [1 ]
Cui S.-J. [1 ]
Wu H.-Q. [1 ]
Wang X.-B. [1 ]
Li X.-L. [1 ]
机构：
[1] School of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2019年 / 32卷 / 02期
关键词：
Linear element coupling; Lumped parameter electromechanical model; Nonlinear vibration; Numerical analysis; Vibration energy harvester;
D O I：
10.16385/j.cnki.issn.1004-4523.2019.02.008
中图分类号：
学科分类号：
摘要：
To improve the output performances of the piezoelectric vibration energy harvester, a multi-stable nonlinear piezoelectric vibration energy harvester (MPVEH) coupled with two linear elastic elements at the tip is presented. In this novel harvester, the large deformation of the two linear elastic elements can change the configuration of the energy harvester, which leads to a mono-stable, bi-stable and tri-stable motion, respectively. The nonlinear restoring force model caused by the deformation of the two linear elastic elements is derived at first, and then the lumped parameter electromechanical model of the new energy harvester is established based on the Rayleigh-Ritz method and energy conversation principle. The effects of the system parameters α and β on the nonlinear restoring force, the potential energy, the equilibriums, the bifurcation characteristics and the dynamics of the novel energy harvester are numerically analyzed. The research results are testified by the finite element model. It is shown that the nonlinear dynamics highly depend on the system parameters α and β. The energy harvester exhibits smooth continuous and non-smooth discontinuous mono-stable, bi-stable and tri-stable dynamics with α=β≠0. The research results are helpful to investigate the dynamical behaviors of the new harvester. © 2019, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：252 / 263
页数：11
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