一类电磁式薄膜振动能量采集器动力学建模与非线性分析

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摘要将柔性薄膜和磁铁弹簧相结合，借助振子的阱间运动特性，创新性地设计了一类具有双稳态形式的电磁式振动能量采集器。对系统中的主要非线性因素（具有中心质量的薄膜振子大变形以及非线性形式的磁场力）进行了全面的分析，进而结合虚功原理建立了系统的振动控制方程。采用理论、数值模拟和实验等手段进行了动力学分析，证明了控制方程的准确性，也验证了双稳态所表征的阱间运动能够有效地拓宽结构的工作带宽、提高输出功率。研究结果对于类似柔性体结构多稳态能量采集器的设计、优化，理论分析都提供了可供借鉴的参考依据。

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	王志霞1
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	王炜 1
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	张琪昌1
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关键词 ：柔性薄膜, 磁铁弹簧, 双稳态能量采集器, 动力学分析

Abstract：A flexible membrane and a magnet spring were innovatively combined to design a type bi-stable state electromagnetic vibration energy harvester by means of inter-well motion characteristics of vibrator.The main nonlinear factors in the system, such as, large deformation of film vibrator with center-mass and nonlinear magnetic field force were comprehensively analyzed, and then the vibration control equation of the system was established using the virtual work principle.The system’s dynamic analysis was performed with theoretical analysis, numerical simulation and tests to verify the correctness of the governing equation.It was shown that the inter-well motion characterized by bi-stable state can effectively widen working bandwidth of the structure and improve its output power; the results can provide a reference for design, optimization and theoretical analysis of multi-stable state energy harvesters of structures similar to flexible bodies.

Key words： flexible membrane magnet spring bistable energy harvester dynamic analysis

收稿日期: 2018-01-03 出版日期: 2019-07-28

引用本文:

王志霞1,2，王炜 1,2，张琪昌1,2. 一类电磁式薄膜振动能量采集器动力学建模与非线性分析[J]. 振动与冲击, 2019, 38(15): 127-133.
WANG Zhixia1,2, WANG Wei1,2, ZHANG Qichang1,2. Dynamic modeling and nonlinear analysis for a type electromagnetic membrane vibration energy harvester. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(15): 127-133.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I15/127

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