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Cointegration: a novel approach for the removal of environmental trends in structural health monitoring data

Proceedings of the Royal Society. A, Mathematical, physical, and engineering sciences, 2011-09, Vol.467 (2133), p.2712-2732 [Peer Reviewed Journal]

COPYRIGHT © 2011 The Royal Society ;This journal is © 2011 The Royal Society ;ISSN: 1364-5021 ;EISSN: 1471-2946 ;DOI: 10.1098/rspa.2011.0023

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  • Title:
    Cointegration: a novel approach for the removal of environmental trends in structural health monitoring data
  • Author: Cross, Elizabeth J. ; Worden, Keith ; Chen, Qian
  • Subjects: Cointegration ; Econometrics ; Eigenvalues ; Environmental disorders ; Environmental Variations ; Mathematical independent variables ; Mathematical procedures ; Mathematical vectors ; Method of characteristics ; Structural Health Monitoring ; Time series ; Time series models
  • Is Part Of: Proceedings of the Royal Society. A, Mathematical, physical, and engineering sciences, 2011-09, Vol.467 (2133), p.2712-2732
  • Description: Before structural health monitoring (SHM) technologies can be reliably implemented on structures outside laboratory conditions, the problem of environmental variability in monitored features must be first addressed. Structures that are subjected to changing environmental or operational conditions will often exhibit inherently non-stationary dynamic and quasi-static responses, which can mask any changes caused by the occurrence of damage. The current work introduces the concept of cointegration, a tool for the analysis of non-stationary time series, as a promising new approach for dealing with the problem of environmental variation in monitored features. If two or more monitored variables from an SHM system are cointegrated, then some linear combination of them will be a stationary residual purged of the common trends in the original dataset. The stationary residual created from the cointegration procedure can be used as a damage-sensitive feature that is independent of the normal environmental and operational conditions.
  • Publisher: The Royal Society Publishing
  • Language: English
  • Identifier: ISSN: 1364-5021
    EISSN: 1471-2946
    DOI: 10.1098/rspa.2011.0023
  • Source: Alma/SFX Local Collection
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