Power analysis of nonlinear vibration energy harvester based on equivalent linearization method

被引：0
|
作者：
Li J. [1 ]
Wang Z. [1 ,2 ]
Wang W. [1 ,2 ]
Wang C. [3 ]
机构：
[1] School of Mechanical Engineering, Tianjin University, Tianjin
[2] Tianjin Municipal Key Lab of Nonlinear Dynamics and Control, Tianjin
[3] Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 01期
关键词：
Dynamic frequency method; Energy harvester; Equivalent linearization; Nonlinear;
D O I：
10.13465/j.cnki.jvs.2022.01.025
中图分类号：
学科分类号：
摘要：
Output power analysis is an important basis for structural design and parametric selection of vibration energy harvester. Here, aiming at the complexity of traditional power analysis methods, taking a type of electromagnetic vibration energy harvester as the study object, a new power analysis method of nonlinear vibration energy harvester was proposed. Its key was to do equivalent linearization treatment for nonlinear vibration equation and perform power optimization analysis with the transfer function method. Firstly, based on the nonlinear magnetic force and Kirchhoff current law, a generalized 1.5-DOF seventh order nonlinear electromechanical coupled model for harvester was established. Secondly, the dynamic frequency method was used to solve the control equation of the system, and high-order harmonic components were used to replace nonlinear terms in the equation, and realize the equivalent linearization of the original system control equation. Finally, the output power expression was derived by using the transfer function method, and effects of equivalent linearization system load, electromechanical coupled coefficient and other factors on output power were analyzed. The results showed that the proposed power analysis based on equivalent linearization can effectively solve complex problems brought by traditional nonlinear energy harvester system power analysis methods, and have good applicability. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：196 / 205
页数：9
相关论文
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