Nondetection, false alarm, and calibration insensitivity in kurtosis- and pseudofractal-based singularity detection

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Title: Nondetection, false alarm, and calibration insensitivity in kurtosis- and pseudofractal-based singularity detection
Authors: Pakrashi, Vikram
Basu, Biswajit
O'Connor, Alan
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Date: 15-Sep-2009
Online since: 2019-05-16T10:27:44Z
Abstract: This work isolates cases of nondetection, false alarm, and insensitivity for a general class of problems dealing with the detection and characterization of existence, location, and extent of singularities embedded in signals or in their derivatives when employing kurtosis- and pseudofractal-based methods for the detection and characterization process. The nondetection, false alarm, and insensitivity for these methods are illustrated on an example problem of damage identification and calibration in beams where the singularity to be identified lies in the derivative of the measured signal. The findings are general, not constrained to linear systems, and are potentially applicable to a wide range of fields including engineering system identification, fault detection, health monitoring of mechanical and civil structures, sensor failure, aerospace engineering, and biomedical engineering.
Type of material: Journal Article
Publisher: ASCE Library
Journal: Journal of Aerospace Engineering
Volume: 22
Issue: 4
Start page: 466
End page: 470
Copyright (published version): 2009 ASCE
Keywords: Numerical AnalysisCrackingIdentificationCalibration
DOI: 10.1061/(ASCE)0893-1321(2009)22:4(466)
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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