elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

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, pp. 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

[img] PDF
4MB

Abstract

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.

Item URL in elib:https://elib.dlr.de/128932/
Document Type:Conference or Workshop Item (Speech)
Title:ACTIVE SIDEWALL PANELS WITH REMOTE MICROPHONE TECHNIQUE FOR AIRCRAFT INTERIOR NOISE REDUCTION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Misol, MalteMalte.Misol (at) dlr.dehttps://orcid.org/0000-0001-8056-1569
Date:2019
Journal or Publication Title:26th International Congress on Sound and Vibration
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-8
Publisher:Canadian Acoustical Association
ISSN:2329-3675
ISBN:9781999181000
Status:Published
Keywords:aircraft, interior noise, active control, remote microphone technique, lining
Event Title:Proceedings of the 26th International Congress on Sound and Vibration
Event Location:Montreal, Kanada
Event Type:international Conference
Event Dates:07.-11. Jul. 2019
Organizer:International Institute of Acoustics and Vibration (IIAV)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Misol, Dr. Malte
Deposited On:02 Sep 2019 08:23
Last Modified:02 Sep 2019 08:23

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.