变势能阱双稳态气动弹性能量收集的性能增强研究

Kui Li, Zhichun Yang, Yingsong Gu, Shengxi Zhou

科研成果: 期刊稿件文章同行评审

7 引用 (Scopus)

摘要

This paper proposes a novel magnet-coupled variable-potential-well bi-stable flutter energy harvester to enhance energy harvesting performance in low air speed regions. The bi-stable configuration under the action of the external magnetic field is designed and the variable-potential-well technique realized using the nonlinear magnetic force and the motion of external magnet with elastic support. The energy harvesting performance is enhanced and its mechanism revealed. The governing equation of the magnet-coupled flutter energy harvester is established. The bi-stable configuration is theoretically analyzed according to the nonlinear magnetic dipole model and the stability theory. The dynamic responses of the energy harvester are numerically simulated. The results show that the bi-stable configuration transforms the supercritical flutter behavior of the non-magnet-coupled system into subcritical flutter one. Therefore, the cut-in air speed of the limit cycle oscillation can be reduced by more than 50%, significantly broadening the effective air speed range for energy harvesting. The influence of the magnet separation distance and magnetic dipole moment on the flutter energy harvesting performance is investigated. Based on the variable-potential-well technique, the separation distance and the corresponding potential well are adaptively adjusted, enabling easier undertaking of the inter-well vibration by the system. Therefore, the beneficial enhancements of the air speed range and output power are simultaneously realized, providing a new design approach for energy harvesting application in low speed air flow.

投稿的翻译标题Performance enhancement of variable-potential-well bi-stable aeroelasticity energy harvesting
源语言繁体中文
文章编号223710
期刊Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica
41
9
DOI
出版状态已出版 - 25 9月 2020

关键词

  • Aeroelasticity
  • Bi-stable
  • Nonlinear
  • Piezoelectric energy harvesting
  • Potential well

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