Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15891
Title: Structural condition assessment from white noise excitation and covariance of covariance matrix
Authors: Law, SS
Lin, JF
Li, XY
Issue Date: 2012
Publisher: American Institute of Aeronautics and Astronautics
Source: AIAA journal, 2012, v. 50, no. 7, p. 1503-1512 How to cite?
Journal: AIAA journal 
Abstract: The sensitivity of covariance of covariance matrix with respect to a local stiffness change in the structural system is derived analytically based on the auto/cross-correlation function of the acceleration response, and the original covariance of covariance formula is improved for use with any number of selected structure modes. This paper presents the approach using the improved covariance of covariance matrix of acceleration response for structural condition assessment under white noise support excitation. A simply supported 31 bar plane truss with and without 10% measurement noise is studied numerically. Results show that the sensitivity approach with the covariance of covariance matrix is accurate, and when including the finite impulse response forward and backward filtering technique, the method would be suitable for industrial application. The covariance of covariance method is shown to be insensitive to measurement noise when the measurement time duration is sufficiently long.
URI: http://hdl.handle.net/10397/15891
ISSN: 0001-1452
EISSN: 1533-385X
DOI: 10.2514/1.J051316
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

7
Last Week
0
Last month
0
Citations as of Aug 18, 2017

WEB OF SCIENCETM
Citations

6
Last Week
0
Last month
1
Citations as of Aug 13, 2017

Page view(s)

31
Last Week
0
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.