The Higher Order Spectra for Condition Monitoring/NDT in Non-Stationary Conditions: Part II

Len Gelman, Ivan Petrunin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The classical multi-frequency higher order spectra (HOS) based on the Fourier transform has been widely investigated for nonlinearity detection in stationary temporal processes. However, for some important applications (e.g. radar and sonar systems, mechanical systems with transient shaft rotation, etc.) it is necessary to process transient temporal processes with any (i.e. linear and nonlinear) polynomial variation of the instantaneous frequency. The classical HOS is not suitable for these processes because:

- the stationary kernel of the Fourier transform is not matched with transient processes, including processes with frequency variation in time.
- averaging of HOS for the whole process duration creates estimation errors due to signal non-stationarity.
Original languageEnglish
Title of host publication10th International Conference of the Slovenian Society for Non-Destructive Testing 2009
Subtitle of host publicationApplication of Contemporary Non-Destructive Testing in Engineering
EditorsJanez Grum
PublisherThe Slovenian Society for Non-Destructive Testing
Pages27-36
Number of pages10
Volume1
ISBN (Print)9781634395830
Publication statusPublished - 1 Oct 2009
Externally publishedYes
Event10th International Conference of the Slovenian Society for Non-Destructive Testing 2009: Application of Contemporary Non-Destructive Testing in Engineering - Ljubljana, Slovenia
Duration: 1 Sep 20093 Sep 2009
Conference number: 10

Publication series

NameEdit E-Journal of Nondestructive Testing & Ultrasonics: The E-Journal of Nondestructive Testing & Ultrasonics
Publisher NDT Internet Publishing
Number10
Volume14
ISSN (Electronic)1435-4934

Conference

Conference10th International Conference of the Slovenian Society for Non-Destructive Testing 2009
CountrySlovenia
CityLjubljana
Period1/09/093/09/09

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  • Cite this

    Gelman, L., & Petrunin, I. (2009). The Higher Order Spectra for Condition Monitoring/NDT in Non-Stationary Conditions: Part II. In J. Grum (Ed.), 10th International Conference of the Slovenian Society for Non-Destructive Testing 2009: Application of Contemporary Non-Destructive Testing in Engineering (Vol. 1, pp. 27-36). (Edit E-Journal of Nondestructive Testing & Ultrasonics: The E-Journal of Nondestructive Testing & Ultrasonics; Vol. 14, No. 10). The Slovenian Society for Non-Destructive Testing. https://www.ndt.net/search/docs.php3?id=8064