双稳态
能量收集
振动
磁铁
加速度
验证质量
声学
频率响应
能量(信号处理)
材料科学
低频
功率(物理)
物理
电气工程
光电子学
经典力学
工程类
量子力学
天文
作者
Jun Chen,Mingxiao Guan,Ziqiao Shen,Qingyuan Zhu,Yueyue Ning
摘要
A two-degree-of-freedom bistable energy harvester with a spring–magnet oscillator designed for ultra-low frequency vibration energy harvesting is presented in this paper. It combines magnetic plucking frequency upconversion and a variable potential function to achieve a high-efficiency response while also being suitably installed for applications with spatial limitations. A lumped parameter model of the piezoelectric energy harvester and the magnetic dipoles is applied to develop the theoretical model for the system. The prototype is fabricated, and experimental parameter investigations are undertaken to examine the effects of various factors, including magnetic distance, stiffness, and tip mass. The results indicate that at a frequency of 1.2 Hz and an acceleration of 0.23 g, the maximum output power reaches 264.6 µW at an optimal resistance of 250 kΩ.
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