中国机械工程 ›› 2015, Vol. 26 ›› Issue (13): 1736-1741.

• 机械基础工程 • 上一篇    下一篇

基于双稳态的振动能量收集系统的设计

姚丙盟;刘志平;李文锋   

  1. 武汉理工大学,武汉,430063
  • 出版日期:2015-07-10 发布日期:2015-07-08
  • 基金资助:
    国家自然科学基金资助项目(51175394)

Design of Vibration Energy Harvester Based on Bistability

Yao Bingmeng;Liu Zhiping;Li Wenfeng   

  1. Wuhan University of Technology,Wuhan,430063
  • Online:2015-07-10 Published:2015-07-08
  • Supported by:
    National Natural Science Foundation of China(No. 51175394)

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

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

中图分类号: