Griesmaier, Roland und Raumer, Hans-Georg (2022) The factorization method and Capon’s method for random source identification in experimental aeroacoustics. Inverse Problems, 38 (11), Seiten 1-17. Institute of Physics (IOP) Publishing. doi: 10.1088/1361-6420/ac90e4. ISSN 0266-5611.
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Offizielle URL: https://iopscience.iop.org/article/10.1088/1361-6420/ac90e4/pdf
Kurzfassung
Experimental aeroacoustics is concerned with the estimation of acoustic source power distributions, which are for instance caused by fluid structure interactions on scaled aircraft models inside a wind tunnel, from microphone array measurements of associated sound pressure fluctuations. In the frequency domain aeroacoustic sound propagation can be modelled as a random source problem for a convected Helmholtz equation. This article is concerned with the inverse random source problem to recover the support of an uncorrelated aeroacoustic source from correlations of observed pressure signals. We show a variant of the factorization method from inverse scattering theory can be used for this purpose. We also discuss a surprising relation between the factorization method and a commonly used beamforming algorithm from experimental aeroacoustics, which is known as Capon’s method or as the minimum variance method. Numerical examples illustrate our theoretical findings.
elib-URL des Eintrags: | https://elib.dlr.de/189579/ | ||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Zusätzliche Informationen: | Paper-DOI: 10.1088/1361-6420/ac90e4 Artikel: 115004 | ||||||||||||
Titel: | The factorization method and Capon’s method for random source identification in experimental aeroacoustics | ||||||||||||
Autoren: |
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Datum: | 26 September 2022 | ||||||||||||
Erschienen in: | Inverse Problems | ||||||||||||
Referierte Publikation: | Ja | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Ja | ||||||||||||
Band: | 38 | ||||||||||||
DOI: | 10.1088/1361-6420/ac90e4 | ||||||||||||
Seitenbereich: | Seiten 1-17 | ||||||||||||
Herausgeber: |
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Verlag: | Institute of Physics (IOP) Publishing | ||||||||||||
ISSN: | 0266-5611 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Capon’s method, random source identification, experimental aeroacoustics, sound pressure fluctuations | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | Effizientes Luftfahrzeug | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L EV - Effizientes Luftfahrzeug | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtuelles Flugzeug und Validierung | ||||||||||||
Standort: | Göttingen | ||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren, GO | ||||||||||||
Hinterlegt von: | Micknaus, Ilka | ||||||||||||
Hinterlegt am: | 13 Dez 2022 10:54 | ||||||||||||
Letzte Änderung: | 28 Jun 2023 13:44 |
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