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面向微振信号的驻极体减振俘能装置设计与建模

刘国平 杨朝舒 何忠波 周景涛 孙民政

刘国平, 杨朝舒, 何忠波, 周景涛, 孙民政. 面向微振信号的驻极体减振俘能装置设计与建模. 力学学报, 2023, 55(1): 169-181 doi: 10.6052/0459-1879-22-444
引用本文: 刘国平, 杨朝舒, 何忠波, 周景涛, 孙民政. 面向微振信号的驻极体减振俘能装置设计与建模. 力学学报, 2023, 55(1): 169-181 doi: 10.6052/0459-1879-22-444
Liu Guoping, Yang Zhaoshu, He Zhongbo, Zhou Jingtao, Sun Minzheng. Design and modeling of electret vibration suppression and energy harvesting device oriented to micro-vibration signals. Chinese Journal of Theoretical and Applied Mechanics, 2023, 55(1): 169-181 doi: 10.6052/0459-1879-22-444
Citation: Liu Guoping, Yang Zhaoshu, He Zhongbo, Zhou Jingtao, Sun Minzheng. Design and modeling of electret vibration suppression and energy harvesting device oriented to micro-vibration signals. Chinese Journal of Theoretical and Applied Mechanics, 2023, 55(1): 169-181 doi: 10.6052/0459-1879-22-444

面向微振信号的驻极体减振俘能装置设计与建模

doi: 10.6052/0459-1879-22-444
基金项目: 国家自然科学基金资助项目(52205137)
详细信息
    作者简介:

    通讯作者: 杨朝舒, 助理研究员, 主要研究方向为智能材料及结构与振动能量回收. E-mail: yangzhaoshu@sina.cn

    通讯作者:

    何忠波, 教授, 主要研究方向为机电液一体化与智能材料应用. E-mail: hzb_hcl_xq@sina.com

  • 中图分类号: TH113.1

DESIGN AND MODELING OF ELECTRET VIBRATION SUPPRESSION AND ENERGY HARVESTING DEVICE ORIENTED TO MICRO-VIBRATION SIGNALS

  • 摘要: 随着航天工程的飞速发展以及先进制造业对加工精度要求的持续提高, 对低频微振信号的控制与利用越发受到关注. 本文采用驻极体材料, 参考动力减振器理论, 开发了一种面向低频微振环境的减振俘能一体化装置, 建立了驻极体减振俘能装置的机电耦合模型. 为兼顾减振和俘能的双重要求, 本文分析和等效了静电力对系统动力学特性的影响, 并进行了参数的评估, 提出了适用于驻极体减振俘能的优化方法. 建立了AMEsim和Simulink的联合仿真环境, 对模型和结果进行了仿真验真. 建模和仿真的结果表明, 本文建立的驻极体减振俘能装置的机电耦合模型可以准确描述装置的运动过程, 建模与仿真的误差在5%以内. 驻极体减振俘能装置对参数变化十分敏感, 且副结构刚度、初始间距等对减振俘能性能的影响都明显强于副结构阻尼. 经过优化, 本文设计的驻极体减振俘能装置, 能够兼顾减振和俘能需求, 可以实现接近于理想动力减振器的减振效果, 也可以在牺牲15%减振效果前提下, 获得1700 V输出电压和3.1 mW俘能功率. 本文建立的机电耦合模型和动态静电力解析模型, 有助于理解驻极体减振俘能机构的工作原理, 揭示了非线性静电力的变化过程和作用机理.

     

  • 图  1  驻极体减振俘能装置

    Figure  1.  Electret vibration suppression energy harvesting device

    图  2  驻极体减振俘能装置受力图(原点位于m1静平衡位置)

    Figure  2.  Force analysis of electret vibration suppression and energy harvesting device (orientation was selected as the equilibrium position of the primary structure )

    图  3  驻极体俘能等效电路图

    Figure  3.  The equivalent circuit of electret-based VEH

    图  4  AMEsim机械模型仿真部分

    Figure  4.  Mechanical field simulation in AMEsim

    图  5  Simulink静电场模型仿真部分

    Figure  5.  Electrostatic field simulation in Simulink

    图  6  理论计算和仿真结果对比

    Figure  6.  Comparison of theoretical calculation and simulation results

    图  7  副结构刚度和阻尼对主结构最大振幅的影响

    Figure  7.  Influence of the stiffness and damping of the secondary structure on the maximum amplitude of the primary structure

    图  8  副结构刚度对主结构幅频响应的影响

    Figure  8.  Influence of the stiffness of the secondary structure on the amplitude-frequency response of the primary structure

    图  9  极板间距对主结构幅频响应的影响

    Figure  9.  Influence of electrode spacing on the amplitude-frequency response of primary structure

    图  10  极板间距对俘能功率的影响

    Figure  10.  Influence of electrode spacing on energy harvesting

    图  11  极板间距和副结构刚度对减振效果和俘能功率的影响

    Figure  11.  Influence of electrode spacing and stiffness of the secondary structure on vibration suppression and energy harvesting

    图  12  优化算例1及对照算例1和2的幅频特性及俘能特性对比

    Figure  12.  Comparison of amplitude-frequency response and energy harvesting of optimization Case 1 and Cases 1, 2 for comparison

    图  13  优化算例2及对照算例1, 2, 3的幅频特性及俘能特性对比

    Figure  13.  Comparison of amplitude-frequency response and energy harvesting of optimization Case 2 and Cases 1, 2, 3 for comparison

    表  1  驻极体减振俘能装置参数设置

    Table  1.   Parameters of electret vibration suppression and energy harvesting device

    Parameters (symbols)UnitsValues
    mass of the primary structure (m1)kg1.7
    stiffness of the primary structure (k1)N/m80000
    the mass ratio between the primary and
    secondary structures (μ)
    0.001
    the area of the electrode spacing of the
    electret energy harvester (A)
    m25.76 × 10−4
    the thickness of the electret (h1)mm0.1
    the relative dielectric constant of electret (εr)2
    parasitic capacitance (Cp)pF13.70
    load resistance (R)1
    下载: 导出CSV

    表  2  仅考虑减振目标的参数优化结果(优化算例1)及对照算例1和2的参数选取

    Table  2.   Parameter optimization results considering only vibration suppression (optimization Case 1) and the parameters of Cases 1 and 2 for comparison

    ParametersUnitsCases 1 and 2 for comparisonOptimization Case 1
    k2N/m79.8480.14
    c2N·s/m0.01420.0144
    h0mm4.0003.967
    下载: 导出CSV

    表  3  同时考虑减振与俘能的参数优化结果(优化算例2)及对照算例3的参数选取

    Table  3.   Parameter optimization results considering both vibration suppression and energy harvesting (optimization Case 2) and the parameters of Case 3 for comparison

    ParametersUnitsOptimization Case 2Case 3 for comparison
    k2N/m80.6980.77
    c2N·s/m0.01030.0103
    h0mm3.9924.391
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-09-23
  • 录用日期:  2022-11-04
  • 网络出版日期:  2022-11-05
  • 刊出日期:  2023-01-18

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