多场耦合作用下旋转振动能量采集器的自调谐增强动力学行为研究

doi:10.3901/JME.2025.10.495

摘要/Abstract

摘要： 提出基于离心场、磁场和重力场等多场耦合协同增强的旋转能量采集器性能调谐方法，设计构建集内、外向磁-机-压电悬臂梁机构于一体的旋转振动能量采集器。利用离心力、磁力和重力的耦合协同作用，内、外向压电悬臂梁分别产生刚度软化和硬化效应，实现能量采集器低频和高频工作范围的同步拓展；进一步利用离心力、磁力和重力的耦合协同作用在内、外向压电悬臂梁上产生周期性的附加激励，实现能量采集器的动态响应幅值和输出电功率同步增强。利用能量法和Hamilton原理建立旋转能量采集器的关键动力学行为分析模型，仿真分析离心力、磁力和重力等对能量采集器动态输特性和频带调谐机理的影响规律。试验结果表明多场耦合作用下内、外向压电梁的工作频带分别提高了2.5 Hz和5.5 Hz，输出电压分别提高了1.9 V和2.6 V，最大输出功率达到0.055 mW。研究结果为开发设计高性能的宽频旋转振动能量采集器提供理论和试验参考。

关键词: 旋转振动能量采集器, 多场耦合, 自调谐, 动力学行为

Abstract: A novel tuning method for a rotating energy harvester based on multi-field coupling effect and collaborative enhancement mechanism of centrifugal field, magnetic field, and gravity field is proposed, and a rotating vibration energy harvester integrating inner and outer magnetic-mechanical-piezoelectric cantilever beams is designed and constructed. By utilizing the coupling and synergistic effect of centrifugal force, magnetic force, and gravity, the inner and outer piezoelectric cantilever beams respectively produce stiffness softening and hardening effects, achieving synchronous expansion of the low-frequency and high-frequency working range of the energy harvester; Further utilizing the coupling and synergistic effects of centrifugal force, magnetic force, and gravity to generate additional periodic excitations on the inner and outer piezoelectric cantilever beams, the dynamic response amplitude and output electrical power of the energy harvester are synchronously enhanced. A key dynamic behavior analysis model for a rotating energy harvester is established using the energy method and Hamilton’s principle. The influence of centrifugal force, magnetic force, and gravity on the dynamic output characteristics and frequency band tuning mechanism of the energy harvester is simulated and analyzed. The experimental results show that under multi-field coupling effect, the operating frequency bands of the inner and outer piezoelectric beams have increased by 2.5 Hz and 5.5 Hz, respectively, and the output voltages have increased by 1.9 V and 2.6 V, respectively, with a maximum output power of 0.055 mW. The research results provide theoretical and experimental references for the development and design of high-performance broadband rotational vibration energy harvesters.

Key words: rotating vibration energy harvester, multi-field coupling, self-tuning, dynamic behavior enhancement

中图分类号:

TM619

周宇洋, 张海彬, 陈渊博, 李康康, 汪御飞, 王光庆. 多场耦合作用下旋转振动能量采集器的自调谐增强动力学行为研究[J]. 机械工程学报, 2025, 61(10): 495-511.

ZHOU Yuyang, ZHANG Haibin, CHEN Yuanbo, LI Kangkang, WANG Yufei, WANG Guangqing. Self-tuning Enhanced Dynamic Behavior of Rotating Vibration Energy Harvester with Multi-field Coupling Effect[J]. Journal of Mechanical Engineering, 2025, 61(10): 495-511.

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链接本文: http://www.cjmenet.com.cn/CN/10.3901/JME.2025.10.495

http://www.cjmenet.com.cn/CN/Y2025/V61/I10/495

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