The New Second and Higher Order Spectral Technique for Damage Monitoring of Structures and Machinery

Len Gelman
Publication Target: 
IJPHM
Publication Issue: 
2
Submission Type: 
Technical Brief
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ijphm_14_007.pdf335.58 KBSeptember 22, 2014 - 10:55am

The new second and higher order spectral technique, the cross-covariance of complex spectral components, is proposed for monitoring damage of structure and machinery Normalization of the proposed technique is also developed. It is shown by simulation that the proposed technique provides effectiveness gain for detecting of damage compared to the higher order spectra. The proposed technique differs from the classical higher order spectral techniques. The proposed un-normalised spectral cross-covariances coincide with the classical un-normalised higher order spectra only for the particular case of the zero mean spectral components. The normalised spectral cross-covariances differ from the classical higher order spectral techniques even for the particular case of the zero mean spectral components.

Publication Year: 
2014
Publication Volume: 
5
Publication Control Number: 
007
Page Count: 
6
Submission Topic Areas: 
Data-driven methods for fault detection, diagnosis, and prognosis
Submitted by: 
  
 
 
 

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