• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (10): 495-511.doi: 10.3901/JME.2025.10.495

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Self-tuning Enhanced Dynamic Behavior of Rotating Vibration Energy Harvester with Multi-field Coupling Effect

ZHOU Yuyang1,2, ZHANG Haibin1,2, CHEN Yuanbo1,2, LI Kangkang1,2, WANG Yufei1,2, WANG Guangqing1,2   

  1. 1. School of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018;
    2. Institute of Artificial Intelligence of Sussex, Zhejiang Gongshang University, Hangzhou 310018
  • Received:2024-05-20 Revised:2025-01-08 Published:2025-07-12

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

CLC Number: