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Noise reduction results of the ACASIAS Active Lining Panel

Misol, Malte and Algermissen, Stephan (2020) Noise reduction results of the ACASIAS Active Lining Panel. International Centre for Numerical Methods in Engineering (CIMNE). European Conference on Multifunctional Structures (EMuS), 17.-18. Nov. 2020, Online. ISBN 978-84-121101-6-6.

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Official URL: https://congress.cimne.com/EMuS2020/

Abstract

Advanced concepts for aero-structures with multifunctional capabilities are investigated within the EU-project ACASIAS. In work package 3 of ACASIAS, components of an active noise reduction system are structurally integrated into a curved sandwich panel by means of 3D printed inserts. This so-called smart lining is intended for application in aircraft as a modular and lightweight interior noise treatment in propeller-driven aircraft. The broad application scenario of smart linings ranges from retro-fitting of current regional aircraft such as ATR 42, ATR 72, DHC-8 Q400 to the application in new short-range aircraft with energy efficient counter rotating open rotor (CROR) engines or with distributed electric propellers. A key feature of the smart lining with integrated active components is its modularity, facilitating a flexible application in the aircraft cabin. This requires a fully self-contained sensing mechanism based on structurally integrated accelerometers. Using the normal surface vibration data from the integrated sensors, the smart lining is able to predict the sound field in front of it. The so-called virtual microphone method with remote sensors and observer filter allows to get rid of real microphones and wiring in the aircraft cabin. This makes retro-fitting easier because it reduces wiring effort and costs which is beneficial for future aircraft as well. However, the use of virtual instead of real microphones might deteriorate the performance or even the stability of the active noise reduction system because it relies on accurate plant models. Laboratory experiments in a sound transmission loss facility are conducted to assess the behavior of the smart lining with virtual microphones and compare it to a smart lining with real microphones. The sensitivity of the smart lining to environmental changes and the noise reduction performance and control system stability are investigated in this study.

Item URL in elib:https://elib.dlr.de/139017/
Document Type:Conference or Workshop Item (Speech)
Title:Noise reduction results of the ACASIAS Active Lining Panel
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Misol, MalteMalte.Misol (at) dlr.dehttps://orcid.org/0000-0001-8056-1569
Algermissen, StephanStephan.Algermissen (at) dlr.dehttps://orcid.org/0000-0002-0507-8195
Date:2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 68-73
Editors:
EditorsEmailEditor's ORCID iD
Kos, JohanRoyal Netherlands Aerospace Center (NLR)UNSPECIFIED
Martinez, XavierUniversitat Politècnica de Catalunya (UPC)UNSPECIFIED
Schippers, HarmenRoyal Netherlands Aerospace Center (NLR)UNSPECIFIED
Publisher:International Centre for Numerical Methods in Engineering (CIMNE)
ISBN:978-84-121101-6-6
Status:Published
Keywords:Active Noise Reduction, ANC, ASAC, Interior Noise, Aircraft, CROR
Event Title:European Conference on Multifunctional Structures (EMuS)
Event Location:Online
Event Type:international Conference
Event Dates:17.-18. Nov. 2020
Organizer:CIMNE Congress Bureau, Barcelona, Spain
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 (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Misol, Dr. Malte
Deposited On:07 Dec 2020 07:16
Last Modified:08 Feb 2021 07:15

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