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An adaptive structural excitation system as a tool for structure-borne noise research

Norambuena, Marco and Winter, Rene (2019) An adaptive structural excitation system as a tool for structure-borne noise research. Deutsche Gesellschaft für Akustik e.V. (DEGA). IAC 2019 - 23rd International Congress on Acoustics, 09.-13. Sep. 2019, Aachen, Germany. ISBN 978-3-939296-15-7. ISSN 2226-7808 and 2415-1599.

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Official URL: http://www.ica2019.org/


Engine vibration has been identified as one of the main sources of structure-borne cabin noise. Researchers could benefit from having the ability to reproduce operational vibro-acoustic excitation on the ground instead of requiring flight testing in order to investigate its generation and transmission paths. While realistic excitation generated by engine operation can be obtained through simulations the injection of these forces is not a trivial task. The excitation system needs to compensate for all modifications introduced not only by the amplification chain but also by the interaction of injected forces in different directions to achieve precise excitation in each individual direction. The development of a multi-channel controller able to perform all required compensations can enable a new approach for vibro-acoustic characterization of aircraft fuselages. The adaptive controller presented here is able to provide all counteractions required in order to replicate translational and rotational forces at the injection points on the structure. The system capabilities are demonstrated on a laboratory structure that resembles typical fuselage subcomponents as skin fields, stringers and frames. The following work describes the adaptive MIMO controller, presents results and discusses its applicability.

Item URL in elib:https://elib.dlr.de/130130/
Document Type:Conference or Workshop Item (Poster)
Title:An adaptive structural excitation system as a tool for structure-borne noise research
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Norambuena, MarcoMarco.Norambuena (at) dlr.deUNSPECIFIED
Winter, ReneRene.Winter (at) dlr.deUNSPECIFIED
Date:9 September 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Publisher:Deutsche Gesellschaft für Akustik e.V. (DEGA)
ISSN:2226-7808 and 2415-1599
Keywords:active, structural, excitation, control
Event Title:IAC 2019 - 23rd International Congress on Acoustics
Event Location:Aachen, Germany
Event Type:international Conference
Event Dates:09.-13. Sep. 2019
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 - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Norambuena, Dr. Marco
Deposited On:23 Dec 2019 15:33
Last Modified:23 Dec 2019 15:33

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