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Fast Online Monitoring and System Identification for the Application in the Field of Aeroelasticity

Jelicic, G. and Schwochow, Jan and Govers, Yves and Hebler, Anne and Böswald, Marc (2015) Fast Online Monitoring and System Identification for the Application in the Field of Aeroelasticity. ICoEC2015 - International Conference on Engineering Vibration 2015, 07. - 10. Sept. 2015, Ljubljana (Laibach), Slowenien.

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During the development of new aircraft wind tunnel testing of 2D and 3D aerofoils or even complete aircraft is essential. The structural integrity of the wind tunnel model needs to be assured for the test campaign because a failure can cause severe damage on the wind tunnel facility and means the loss of the costly model itself. To enhance the level of safety, a detection of the flutter stability while testing is desirable. This new development utilizes ex-perimental and operational modal analysis methods for fast and reliable online identifcation of a system's eigenvalues and eigenvectors. The developed code presented here uses efficient and novel implementations of signal processing and system identifcation algorithms coupled with new ones for mode selection and tracking, to achieve a computation time in the order of seconds, thus allowing a responsive temporal tracking of varying parameters. The code de-veloped at the Institute of Aeroelasticity at the German Aerospace Centre (DLR) is written in MATLAB, is hardware-agnostic and its performance has been assessed with different models. The main focus of the discussion is the time efficiency of various algorithms which enable the online monitoring of system parameters, with an overlook of the influence on speed of various parameters along with presentation of results of a flutter test conducted in the Transonic Wind tunnel in Göttingen.

Item URL in elib:https://elib.dlr.de/100939/
Document Type:Conference or Workshop Item (Speech)
Title:Fast Online Monitoring and System Identification for the Application in the Field of Aeroelasticity
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jelicic, G.UNSPECIFIEDhttps://orcid.org/0000-0001-5091-6699
Govers, YvesUNSPECIFIEDhttps://orcid.org/0000-0003-2236-596X
Hebler, AnneUNSPECIFIEDhttps://orcid.org/0000-0002-5450-9211
Böswald, MarcUNSPECIFIEDhttps://orcid.org/0000-0001-8260-8623
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Flutter, Operational Modal Analysis
Event Title:ICoEC2015 - International Conference on Engineering Vibration 2015
Event Location:Ljubljana (Laibach), Slowenien
Event Type:international Conference
Event Dates:07. - 10. Sept. 2015
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 - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Grischke, Birgid
Deposited On:22 Dec 2015 14:57
Last Modified:29 Mar 2023 00:25

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