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.
- 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 language | English |
---|---|
Title of host publication | 10th International Conference of the Slovenian Society for Non-Destructive Testing 2009 |
Subtitle of host publication | Application of Contemporary Non-Destructive Testing in Engineering |
Editors | Janez Grum |
Publisher | The Slovenian Society for Non-Destructive Testing |
Pages | 27-36 |
Number of pages | 10 |
Volume | 1 |
ISBN (Print) | 9781634395830 |
Publication status | Published - 1 Oct 2009 |
Externally published | Yes |
Event | 10th International Conference of the Slovenian Society for Non-Destructive Testing 2009: Application of Contemporary Non-Destructive Testing in Engineering - Ljubljana, Slovenia Duration: 1 Sep 2009 → 3 Sep 2009 Conference number: 10 |
Publication series
Name | Edit E-Journal of Nondestructive Testing & Ultrasonics: The E-Journal of Nondestructive Testing & Ultrasonics |
---|---|
Publisher | NDT Internet Publishing |
Number | 10 |
Volume | 14 |
ISSN (Electronic) | 1435-4934 |
Conference
Conference | 10th International Conference of the Slovenian Society for Non-Destructive Testing 2009 |
---|---|
Country/Territory | Slovenia |
City | Ljubljana |
Period | 1/09/09 → 3/09/09 |