Design of Vibration Energy Harvester Based on Bistability

Abstract

Abstract:

An energy harvester was designed by permanent magnets, a cantilever beam, piezoelectric material and so on, and the influence factors were studied experimentally and theoretically herein.The conclusion is made that the system has a bistable behavior under the suitable magnetic distance, which broadens the range of frequency response and increases the response amplitude, and the nonlinear bistable system has a higher efficiency of energy harvesting than that of a linear system under the suitable excitation amplitude and excitation frequency.

Key words: vibration energy harvesting, bistability, piezoelectric cantilever beam, nonlinear

摘要：

利用外部永磁铁、悬臂梁和压电材料等构成了能量收集系统，并对该系统的影响因素进行了理论与实验探究。结果发现：只有在合适的磁铁距离下，系统才具有双稳态特性，而且这种特性拓宽了系统的频率响应范围，使系统获得更大的响应幅值。只有在适当的激励幅值和激励频率下，该非线性系统才能获得比线性系统更高的能量俘获效率。

关键词: 振动能量收集, 双稳态, 压电悬臂梁, 非线性的

CLC Number:

TM31
TN384

Yao Bingmeng, Liu Zhiping, Li Wenfeng. Design of Vibration Energy Harvester Based on Bistability[J]. China Mechanical Engineering, 2015, 26(13): 1736-1741.

姚丙盟, 刘志平, 李文锋. 基于双稳态的振动能量收集系统的设计[J]. 中国机械工程, 2015, 26(13): 1736-1741.

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