Effects of excitation frequency on detection accuracy of orthogonal wavelet decomposition for structural health monitoring

被引:0
|
作者
Raul J.Alonso
Mohammad Noori
Soheil Saadat
Arata MasudaDepartment of Mechanical and System Engineering
机构
[1] Department of Mechanical & Aerospace Engineering,North Carolina State University
[2] Mechanical Engineering & Eleetro Optical Systems-MS 368,1362 Brass Mill Road
关键词
wavelet analysis; damage detection; structural health monitoring;
D O I
暂无
中图分类号
TU317 [结构试验与检验];
学科分类号
081304 ; 081402 ;
摘要
Accurate estimation of stiffness loss is a challenging problem in structural health monitoring.In this studyorthogonal wavelet decomposition is used for identifying the stiffness loss in a single degree of freedom spring-mass-dampersystem.The effects of excitation frequency on accuracy of damage detection is investigated.Results show that pseudo-aliaseffects caused by the orthogonal wavelet decomposition(OWD),affect damage detectability.It is demonstrated that theproposed approach is sunable for damage detection when the excitation frequency is relatively low.This study shows how apriori knowledge about the signal and ability to control the sampling frequency can enhance damage detectability.
引用
收藏
页码:101 / 106
页数:6
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