Application of S transform in structural health monitoring

Pakrashi, Vikram; Ghosh, Bidisha

Application of S transform in structural health monitoring

dc.contributor.author	Pakrashi, Vikram
dc.contributor.author	Ghosh, Bidisha
dc.date.accessioned	2011-03-03T16:17:06Z
dc.date.available	2011-03-03T16:17:06Z
dc.date.issued	2009
dc.date.updated	2010-10-07T14:24:10Z
dc.description.abstract	The successful detection of change in a data or in any of its derivatives in the presence of noise is a critical component of structural health monitoring and damage detection. This sudden change can be brought about by a sudden change in the strain or the stress field of the structural system under consideration. Two very typical examples of such sudden changes are the sudden change in stiffness of a vibrating single degree of freedom system in time and the local perturbation of stress and strain fields of a beamlike structure in space due to the presence of an open crack. New methods and analysis techniques have become popular in the field of structural health monitoring to detect and characterise such changes. Time – frequency techniques, like wavelet analysis are being more widely used in this regard in the recent times for the detection of presence, location and the calibration of the extent of these changes. This paper presents the application of S transform for the successful detection and calibration of damage in time and in space in the presence of additive Gaussian white noise. The performance of S transform based detection is compared with wavelet based and statistics based methodologies. The application and use of S transform in the field of structural health monitoring is observed to be extremely promising.	en
dc.description.status	Peer reviewed	en
dc.description.uri	http://www.ndt.net/article/ndtce2009/index.htm	en
dc.description.version	Published Version	en
dc.format.mimetype	application/pdf	en
dc.identifier.citation	Pakrashi V., Ghosh B., 2009. Application of S transform in structural health monitoring. In: 7th International Symposium on Nondestructive Testing in Civil Engineering (NDTCE). Nantes, France 30 Jun - 3 Jul 2009.	en
dc.identifier.isbn	9782720825425
dc.identifier.uri	https://hdl.handle.net/10468/240
dc.language.iso	en	en
dc.relation.ispartof	7th International Symposium on Nondestructive Testing in Civil Engineering (NDTCE). Nantes, France 30 Jun - 3 Jul 2009
dc.relation.uri	http://www.ndt.net/article/ndtce2009/papers/192.pdf
dc.subject	Wavelet	en
dc.subject	Damage	en
dc.subject	Short time Fourier transform	en
dc.subject	Kurtosis	en
dc.subject.lcsh	Structural health monitoring	en
dc.subject.lcsh	Noise	en
dc.title	Application of S transform in structural health monitoring	en
dc.title.alternative	Damage detection in beams with an open crack using S transform	en
dc.type	Conference item	en