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Efficient ground vibration testing of aircraft based on output-only modal analysis during taxi

Govers, Yves and Sinske, Julian and Schwochow, Jan and Jelicic, G. and Buchbach, Ralf and Springer, Julian and Böswald, Marc (2017) Efficient ground vibration testing of aircraft based on output-only modal analysis during taxi. In: 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. AIAA SciTech 2017, 09.-13. Jan. 2017, Grapevine, Texas, USA. DOI: 10.2514/6.2017-1824

Full text not available from this repository.

Abstract

The work presented in this paper shows a simple way how to obtain eigenfrequencies, damping ratios and mode shapes of an aircraft prototype. The only prerequisite is flight test instrumentation (FTI) including a set of acceleration sensors with sufficient number and distribution over the aircraft components and data acquisition hardware. For the excitation of the structure the aircraft is towed by a tractor on the runway. The enforced motion at the landing gears will induce distributed inertia excitation causing airframe vibrations that can be measured with acceleration sensors. Time recordings of all acceleration channels are converted to cross-power spectral densities and later on analyzed using the means of operational modal analysis. The work presented here demonstrates how this method was used to verify the proper operation of the FTI right before entering into the flight testing. However, with more intensive installation, the method can also be used for a complete modal identification of the aircraft on ground, equivalent to ground vibration testing (GVT).

Item URL in elib:https://elib.dlr.de/115585/
Document Type:Conference or Workshop Item (Speech)
Title:Efficient ground vibration testing of aircraft based on output-only modal analysis during taxi
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Govers, Yvesyves.govers (at) dlr.dehttps://orcid.org/0000-0003-2236-596X
Sinske, Julianjulian.sinske (at) dlr.dehttps://orcid.org/0000-0002-6080-9982
Schwochow, Janjan.schwochow (at) dlr.dehttps://orcid.org/0000-0002-5430-8479
Jelicic, G.goran.jelicic (at) dlr.dehttps://orcid.org/0000-0001-5091-6699
Buchbach, Ralfralf.buchbach (at) dlr.dehttps://orcid.org/0000-0003-3417-997X
Springer, Julianjulian.springer (at) dlr.dehttps://orcid.org/0000-0002-0795-8786
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623
Date:2017
Journal or Publication Title:58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2017-1824
Status:Published
Keywords:vibration testing, aircraft, output-only modal analysis, operational, flight test
Event Title:AIAA SciTech 2017
Event Location:Grapevine, Texas, USA
Event Type:international Conference
Event Dates:09.-13. Jan. 2017
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: Grischke, Birgid
Deposited On:06 Dec 2017 16:01
Last Modified:06 Dec 2017 16:01

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