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ACTIVE SIDEWALL PANELS WITH REMOTE MICROPHONE TECHNIQUE FOR AIRCRAFT INTERIOR NOISE REDUCTION

Misol, Malte (2019) ACTIVE SIDEWALL PANELS WITH REMOTE MICROPHONE TECHNIQUE FOR AIRCRAFT INTERIOR NOISE REDUCTION. In: 26th International Congress on Sound and Vibration, Seiten 1-8. Canadian Acoustical Association. Proceedings of the 26th International Congress on Sound and Vibration, 07.-11. Jul. 2019, Montreal, Kanada. ISBN 9781999181000. ISSN 2329-3675.

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Kurzfassung

The main issue of this contribution is the reduction of aircraft interior noise by means of actively controlled sidewall panels (linings). It was shown in prior work that considerable reductions of interior sound pressure level can be achieved using structural actuators on the lining and microphones distributed in the seat area in front of the linings. The use of microphones is undesirable for several reasons and it contradicts the aim of a fully integrated and autonomous lining module (smart lining). Therefore, the present contribution aims at the replacement of the error microphones by a number of structural sensors and an acoustic filter. This method is called the remote microphone technique for active control. Several steps are undertaken to define the smart lining with remote microphones. The whole work is based on experimental data of a double panel system mounted in a sound transmission loss facility. A multi-tonal acoustic excitation, typical for a counter rotation open rotor (CROR) engine, is used as the load case for the definition of the actuators and a broadband acoustic excitation, is used as the load case for the definition of structural sensors. 19 accelerometers are mounted on the lining and 20 microphones are placed in front of it. All sensor signals are sampled simultaneously for deterministic and broadband load cases. The lining is equipped with two inertial mass actuators at fixed positions which are used for the active control. The measurement data is used for the derivation of an observer and for the simulation of a smart lining with remote microphones.

elib-URL des Eintrags:https://elib.dlr.de/128932/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:ACTIVE SIDEWALL PANELS WITH REMOTE MICROPHONE TECHNIQUE FOR AIRCRAFT INTERIOR NOISE REDUCTION
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Misol, MalteMalte.Misol (at) dlr.dehttps://orcid.org/0000-0001-8056-1569NICHT SPEZIFIZIERT
Datum:2019
Erschienen in:26th International Congress on Sound and Vibration
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-8
Verlag:Canadian Acoustical Association
ISSN:2329-3675
ISBN:9781999181000
Status:veröffentlicht
Stichwörter:aircraft, interior noise, active control, remote microphone technique, lining
Veranstaltungstitel:Proceedings of the 26th International Congress on Sound and Vibration
Veranstaltungsort:Montreal, Kanada
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:07.-11. Jul. 2019
Veranstalter :International Institute of Acoustics and Vibration (IIAV)
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Systeme und Kabine (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Adaptronik
Hinterlegt von: Misol, Dr. Malte
Hinterlegt am:02 Sep 2019 08:23
Letzte Änderung:05 Okt 2020 09:07

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