Modeling and characteristic analysis of arch-thready nonlinear magnetic coupled piezoelectric energy harvester
CHEN Xiaoyu1,3, ZHANG Xuhui1,2, ZUO Meng1, FAN Hongwei1,2, WANG Lin1
1.College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;
2.Shaanxi Provincial Key Lab of Mine Electromechanical Equipment Intelligent Monitoring, Xi’an 710054, China;
3.Engineering College, Zunyi Normal College, Zunyi 563006, China
Abstract：In order to analyze vibration characteristics of an arc-thready nonlinear magnetic coupled piezoelectric energy harvester, the magnetic force model was established by using the magnetizing current method, the energy harvester’s nonlinear recovering force model was obtained using the test data fitting method, and the system’s dynamic equations were established using the generalized Hamilton variation principle.The harmonic balance method was used to solve the system’s dynamic equations, and reveal effects of excitation conditions and magnetic distance on the harvester’s vibration characteristics.The correctness of the theoretical analysis was verified with tests.The results showed that the large-amplitude response bandwidth and response amplitude of the energy harvester increase with increase in excitation intensity; decrease in magnetic distance can increase large-amplitude response bandwidth, and decrease response amplitude; compared with the energy harvester with a straight beam structure, the harvester with arch-thready structure can increase its output voltage and improve its energy-capturing performance; the study provides a theoretical guidance for designing arch-thready piezoelectric energy harvester, and a new idea for improving its performance.
陈孝玉1,3，张旭辉1,2，左萌1，樊红卫1,2，汪林1. 拱形-线形非线性磁力耦合压电俘能器建模与特性分析[J]. 振动与冲击, 2021, 40(9): 110-119.
CHEN Xiaoyu1,3, ZHANG Xuhui1,2, ZUO Meng1, FAN Hongwei1,2, WANG Lin1. Modeling and characteristic analysis of arch-thready nonlinear magnetic coupled piezoelectric energy harvester. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(9): 110-119.
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