带有限位器的cut-out压电梁采集性能分析和实验

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (12) : 70-79.

振动理论与交叉研究

带有限位器的cut-out压电梁采集性能分析和实验

李浚超1，张晓芳*1，姜文安1，毕勤胜1，陈立群2

作者信息 +

Performance analysis and experiment of cut-out piezoelectric beam with limiter

LI Junchao1，ZHANG Xiaofang*1，JIANG Wenan1，BI Qinsheng1，CHEN Liqun2

Author information +

文章历史 +

摘要

振动能量采集是一个热门的研究领域，已有研究工作主要集中于自由的环境空间。为适应有限狭小空间的极端环境，本文设计了一种带有限位器的cut-out型压电梁采集器。该采集器由cut-out型压电梁、两对限位器和集中质量块组成。基于压电守恒关系，建立了系统的动力学方程。利用直接数值积分方法，分析了限位器间距、系统刚度、外部激励幅值及机电耦合系数对采集频率带宽、电压以及振幅的影响。通过与没有限位器作用的线性采集系统对比，发现合理的限位间距和适当的刚度、加速度幅值和压电系数可以拓宽采集频率带宽，增大输出电压及功率。最后，通过实验证实了数值分析的正确性。

Abstract

Vibration energy harvesting is a hot research field, and the existing research work mainly focuses on the free environmental space. In order to adapt to the extreme environment of limited and narrow space, a cut-out piezoelectric beam harvester with limiter is designed in this paper. The harvester is composed of a cut-out piezoelectric beam, two pairs of limiters and concentrated mass blocks. Based on the piezoelectric conservation relationship, the dynamics equation of the system is established. The effects of the distance of the limiter, the stiffness of the system, the external excitation amplitude and the electromechanical coupling coefficient on the frequency bandwidth, voltage and amplitude of the acquisition were analyzed by direct numerical integration method. By comparing with the linear harvester system without limiter, it is found that the acquisition frequency bandwidth, output voltage and power can be increased by reasonable limit spacing, proper stiffness, acceleration amplitude and piezoelectric coefficient. Finally, the correctness of the numerical analysis is verified by experiments.

导出引用

李浚超1, 张晓芳1, 姜文安1, 毕勤胜1, 陈立群2. 带有限位器的cut-out压电梁采集性能分析和实验[J]. 振动与冲击, 2025, 44(12): 70-79

LI Junchao1, ZHANG Xiaofang1, JIANG Wenan1, BI Qinsheng1, CHEN Liqun2. Performance analysis and experiment of cut-out piezoelectric beam with limiter[J]. Journal of Vibration and Shock, 2025, 44(12): 70-79

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