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Vibration control with piezoelectric elements: The indirect measurement of the modal capacitance and coupling factor

机译：具有压电元件的振动控制：模态电容和耦合因子的间接测量

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摘要

The knowledge of the modal capacitance and electro-mechanical coupling factor is essential for a proper design of systems with embedded piezoelectric transducers and materials. In light of this, this paper presents two indirect methods for measuring the piezoelectric modal capacitance and a method to estimate the modal electro-mechanical coupling factor. All methods rely on simple vibration measurements of the structure with the piezoelectric transducer connected to a proper shunt impedance, thus avoiding measurements of piezoelectric current and voltage by expensive equipment. For the modal electro-mechanical coupling factor, the proposed method guarantees reduced uncertainty compared to traditional experimental estimation procedures. Upon introduction of the underlying theory, the paper experimentally demonstrates the reliability and effectiveness of the methods by comparison with well-established procedures.
机译：模态电容和机电耦合因子的知识对于具有嵌入式压电换能器和材料的系统的适当设计是必不可少的。鉴于此，本文提出了用于测量压电模态电容的两个间接方法和估计模态电力机械耦合因子的方法。所有方法都依赖于结构的简单振动测量与压电换能器连接到适当的分流阻抗，从而避免通过昂贵设备测量压电电流和电压。对于模态电力机械耦合因子，所提出的方法可确保与传统的实验估算程序相比降低不确定性。在引入潜在理论后，本文通过与良好的程序进行了实验证明了方法的可靠性和有效性。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第4期|107350.1-107350.16|共16页
  • 作者

    M. Berardengo; S. Manzoni; J. HΦgsberg; M. Vanali;

  • 作者单位

    Universitd degli Studi di Cenova Department of Mechanical Energy Management and Transportation Engineering Via Opera Pia 15A -16145 Genoa Italy Universita degli Studi di Parma Department of Engineering and Architecture Parco Area delle Scienze 181/A - 43124 Parma Italy;

    Politecnico di Milano Department of Mechanical Engineering Via La Masa 34 -20156 Milan Italy;

    Technical University of Denmark Department of Mechanical Engineering Nils Koppels Alle building 403 DK-2800 Kongens Lyngby Denmark;

    Universita degli Studi di Parma Department of Engineering and Architecture Parco Area delle Scienze 181/A - 43124 Parma Italy;

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

    Vibration control; Modal capacitance; Coupling factor; Piezoelectric shunt; Negative capacitance; Resonant shunt;

    机译：振动控制;模态电容;耦合因子;压电分流器;负电容;共振分流;

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