Electromechanical impedance (EMI) based techniques have been proposed for structural health monitoring due to their sensitivity to low levels of damage. Most of the work in the EMI technique depends on the change in the admittance signature of the structure in the healthy and damaged state. Several metrics have been proposed to quantify this difference in the signature. Most common being root-mean square difference (RMSD), mean absolute percentage deviation, correlation coefficient etc. As the admittance signatures has several troughs and peaks, the statistical metrics are not robust and often show false detection due to ambient changes and measurement noise. Thus, this paper proposes a novel index for the damage detection using the EMI technique based on the cumulative electrical power. The frequency v/s resistance or conductance plot is used for calculating the normalized cumulative electrical power (NCP) of the system. The NCP curve is a monotonically increasing functi...

中文翻译：

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基于累积电功率的鲁棒度量的开发，用于基于机电阻抗的结构健康监测

已经提出了基于机电阻抗（EMI）的技术，用于结构健康监测，因为它们对低水平的损坏很敏感。EMI技术中的大多数工作都取决于健康和受损状态下结构的导纳符号的变化。已经提出了几种度量来量化签名中的这种差异。最常见的是均方根差（RMSD），平均绝对百分比偏差，相关系数等。由于导纳签名具有多个波谷和波峰，因此统计指标不够鲁棒，并且由于环境变化和测量噪声而经常显示错误检测。因此，本文提出了一种基于EMI的基于累积电能的损伤检测新指标。频率v / s电阻或电导图用于计算系统的归一化累积电功率（NCP）。NCP曲线是单调递增的函数。