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Optimal Accelerometer Locations for Structural Health Monitoring using Time-Domain System Identification

机译:使用时域系统识别进行结构健康监测的最佳加速度计位置

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摘要

The paper presents two algorithms for determining optimal accelerometer locations for structural health monitoring when structural condition is assessed by a system identification scheme in time-domain. The accelerometer locations are determined by ranking the components of an effective independent distribution vector computed from a Fisher information matrix. One of the proposed algorithms formulates a Fisher information matrix by multiplying acceleration matrix with its transpose and the other as a Gauss-Newton Hessian matrix composed of acceleration sensitivities with respect to structural parameters. Since the structural parameters cannot be known exactly in an actual application, a statistical approach is proposed by setting an error bound between the actual and the baseline values. To examine the algorithm, simulation studies have been carried out on a two-span planar truss. The results using locations selected by the two algorithms were compared.
机译:本文提出了两种算法,用于在时域中通过系统识别方案评估结构状况时,确定用于结构健康监测的最佳加速度计位置。通过对从Fisher信息矩阵计算出的有效独立分布矢量的分量进行排序,可以确定加速度计的位置。所提出的一种算法通过将加速度矩阵与其转置相乘来形成Fisher信息矩阵,另一种算法是由对结构参数的加速度敏感度组成的Gauss-Newton Hessian矩阵。由于在实际应用中无法准确知道结构参数,因此建议通过在实际值和基准值之间设置误差范围来提出统计方法。为了检查该算法,已经在两跨平面桁架上进行了仿真研究。比较了使用两种算法选择的位置的结果。

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