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Online monitoring of flutter stability during wind tunnel testing of an elastic wing with pylon and engine nacelle within the HMAE1 project

Böswald, Marc and Govers, Yves and Jelicic, Goran and Buchbach, Ralf (2019) Online monitoring of flutter stability during wind tunnel testing of an elastic wing with pylon and engine nacelle within the HMAE1 project. IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics, 10.-13. Juni 2019, Savannah, GA (USA).

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Abstract

Flutter testing in high speed wind tunnels is very challenging and costly. In order to enhance safety levels and to increase the amount of scientific output, real time identification methods are indispensable. This paper addresses a technique for fast and reliable identification of eigenfrequencies and damping ratios using operational modal analysis methods. The procedure has been developed by the Institute of Aeroelasticity of the German Aerospace Center (DLR) in Goettingen, Germany. It uses acceleration signals from turbulence excitation during wind tunnel testing for output-only modal identification. The evolution of eigenfrequencies and damping ratios in the range of interest is tracked over time and wind tunnel parameters. In more detail, the paper focuses on a wind tunnel test campaign conducted by the aircraft manufacturer Embraer, the German Aerospace Center, the Netherlands Aerospace Centre (NLR) and German–Dutch Wind Tunnels (DNW) on a highly elastic fiberglass wing body pylon nacelle configuration.

Item URL in elib:https://elib.dlr.de/128030/
Document Type:Conference or Workshop Item (Speech)
Title:Online monitoring of flutter stability during wind tunnel testing of an elastic wing with pylon and engine nacelle within the HMAE1 project
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623
Govers, YvesYves.Govers (at) dlr.dehttps://orcid.org/0000-0003-2236-596X
Jelicic, GoranGoran.Jelicic (at) dlr.dehttps://orcid.org/0000-0001-5091-6699
Buchbach, Ralfralf.buchbach (at) dlr.dehttps://orcid.org/0000-0003-3417-997X
Date:10 June 2019
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:wind tunnel testing, real-time aeroelastic system identification, output-only modal analysis, flutter stability
Event Title:IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics
Event Location:Savannah, GA (USA)
Event Type:international Conference
Event Dates:10.-13. Juni 2019
Organizer:AIAA
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
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Böswald, Dr.-Ing. Marc
Deposited On:26 Jun 2019 17:49
Last Modified:26 Jun 2019 17:49

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