Oma modal indication by sensitivity to added artificial noise

Martin O. Juul, Peter Olsen, Marius Tarpø, Rune Brincker

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

This paper presents a modal indicator for use in OMA identification techniques relying on the correlation function for extraction of parameters. We propose to add small amounts of artificial white Gaussian noise to the correlation function and measuring the sensitivity of the identified modes to this noise. The idea is to identify system parameters many times, each time adding a tiny amount of uncorrelated white Gaussian noise to the correlation function. Since the noise modes are more affected by the adding of tiny amounts of additional noise, than the physical modes, the variance of the estimated parameters gives an effective modal indicator.
Original languageEnglish
Title of host publicationIOMAC 2017 - 7th International Operational Modal Analysis Conference
Publication date2017
Pages92-95
Publication statusPublished - 2017
Event7th International Operational Modal Analysis Conference - Ingolstadt, Germany
Duration: 10 May 201712 May 2017
Conference number: 7

Conference

Conference7th International Operational Modal Analysis Conference
Number7
CountryGermany
CityIngolstadt
Period10/05/201712/05/2017

Cite this

Juul, M. O., Olsen, P., Tarpø, M., & Brincker, R. (2017). Oma modal indication by sensitivity to added artificial noise. In IOMAC 2017 - 7th International Operational Modal Analysis Conference (pp. 92-95)