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On the robustness of the average power ratios in damping estimation: application in the structural health monitoring of composites beams

机译:平均功率比在阻尼估计中的鲁棒性:在复合材料梁结构健康监测中的应用

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摘要

In composites structures, cracking, delamination will cause changes in the measured dynamic response of structure and so on experimentally modal parameters. Estimation of damping in structural control often poses a difficult problem especially using broadband experiments. If these estimations are faulty, it is difficult to propose a robust Structural Health Monitoring (SHM) algorithm. Recently H.P. Yin introduced the optimal power ratios damping estimator. A new theoretical basis of the bandwidth method for the damping estimation from frequency response functions (in case of a single degree of freedom system) has been proposed. The main goal of this paper is to study the robustness of this enhanced damping estimator on simulated signal (sampling frequency, Signal to Noise Ratio and damping level/density), and also compare its performance with industrial improved estimator like “Polymax” on experimental Frequency Response Functions (FRFs). The pole shifts would be studied as a change in the frequency-damping plane function of level and density of damage.
机译:在复合材料结构中,开裂,分层会导致所测量的结构动态响应等实验模态参数发生变化。估计结构控制中的阻尼通常会带来一个难题,尤其是使用宽带实验时。如果这些估计有误,则很难提出鲁棒的结构健康监测(SHM)算法。最近H.P.尹介绍了最佳功率比阻尼估计器。提出了一种新的带宽方法用于从频率响应函数进行阻尼估计的理论基础(在单自由度系统的情况下)。本文的主要目的是研究这种增强型阻尼估计器在模拟信号(采样频率,信噪比和阻尼水平/密度)上的鲁棒性,并与工业改进的估计器(如“ Polymax”)在实验频率上的性能进行比较。响应函数(FRF)。极移将作为频率衰减平面函数的水平和损伤密度的变化来研究。

著录项

  • 作者

    Morlier Joseph; Yin H.P.;

  • 作者单位
  • 年度 2010
  • 总页数
  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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