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Design and analysis of a broadband three-beam impact piezoelectric energy harvester for low-frequency rotational motion

机译：宽带三梁冲击压电能收割机的设计与分析，用于低频旋转运动

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摘要

This paper proposes a three-beam impact energy harvester (TIEH) to enhance the energy harveting efficiency for low-frequency rotational motion. The design includes three beams, including the excitation beam, the harvesting beam and the protection beam. The excitation is generated by the impact of the excitation beam and the harvesting beam, and the harvesting beam breaks through the resonance state limitation to obtain more excellent performance in the low-frequency band. Through the design of centrifugal force, the soften or harden effect can be obtained to adapt to different application scenarios. In this paper, the TIEH electromechanical coupling model is established, and the concept of design factor is proposed for the centrifugal force scheme to simplify the design and analysis. The tested TIEH can obtain 52.1 μW at 4.2 Hz with 1.9 Hz bandwidth over 2 V. The Soften TIEH has a 23.0% power increase and 15.8% bandwidth reduction and the Harden TIEH has a 11.9% power reduction and 52.6% bandwidth increase. The results show that the TIEH has the characteristics of low frequency band, wide frequency band, and parameter insensitivity, and has the potential to be applied to a low-frequency rotational structure with limited volume.
机译：本文提出了一种三梁冲击能量收割机（TIEH），以提高低频旋转运动的能量牵引效率。该设计包括三个光束，包括激励梁，收获梁和保护梁。通过激发梁和收获光束的影响产生激励，并且收获光束通过共振状态限制来突破，以在低频带中获得更优异的性能。通过对离心力的设计，可以获得软化或硬化效果以适应不同的应用场景。本文建立了捷基机电耦合模型，提出了对离心力方案的设计因子的概念，简化了设计和分析。测试的Tieh可以在4.2 Hz上获得52.1μW，超过2V的带宽为1.9 Hz带宽。软化泰H具有23.0％的功率增加和15.8％的带宽减少，硬化威丝的功率降低11.9％，带宽增加52.6％。结果表明，威廉具有低频带，宽频带和参数不敏感性的特点，并且具有有可能应用于具有有限体积的低频旋转结构。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第2期|107307.1-107307.15|共15页
  • 作者

    Xiaobo Rui; Yu Zhang; Zhoumo Zeng; Guixuan Yue; Xinjing Huang; Jian Li;

  • 作者单位

    State Key laboratory of Precision Measurement Technology and Instrument Tianjin University Tianjin 300072 China;

    State Key laboratory of Precision Measurement Technology and Instrument Tianjin University Tianjin 300072 China;

    State Key laboratory of Precision Measurement Technology and Instrument Tianjin University Tianjin 300072 China;

    State Key laboratory of Precision Measurement Technology and Instrument Tianjin University Tianjin 300072 China;

    State Key laboratory of Precision Measurement Technology and Instrument Tianjin University Tianjin 300072 China;

    State Key laboratory of Precision Measurement Technology and Instrument Tianjin University Tianjin 300072 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rotation; Energy harvest; Piezoelectric; Impact; Low-frequency;

    机译：回转;能量收获;压电;影响;低频;

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