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Recent developments in operational modal analysis for ground and flight vibration testing

Böswald, Marc and Schwochow, Jan and Jelicic, G. and Govers, Yves (2017) Recent developments in operational modal analysis for ground and flight vibration testing. In: Proceedings of the International Forum on Aeroelasticity and Structural Dynamics (IFASD 2017). IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics, 25.-28. Jun. 2017, Como, Italien. ISBN 978-88-97576-28-0

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Abstract

In this paper, recent advances are presented in ground vibration testing and flight vibration testing of aircraft as applied at DLR, the German Aerospace Center. New test procedures have been developed with specific focus on efficient certification of experimental aircraft operated by DLR. These research aircraft quite often are modified to fulfill scientific missions, e.g. to carry scientific equipment for atmospheric research or to demonstrate and assess new aircraft technology in flight. For this reason, DLR is interested in the development, maturation and application of advanced test methods for ground vibration testing and flight vibration testing, because the selection of the test method to demonstrate compliance with certification requirements has strong impact on the cost for certification and the availability of the aircraft for the intended scientific missions. The new methods are based on output-only modal analysis. Fast data analysis tools have been implemented which enable automated real-time modal analysis. This paper demonstrates the ability of the new methods to monitor the aeroelastic stability in flight by tracking the changes of eigenfrequencies and damping ratios continuously and in real time.

Item URL in elib:https://elib.dlr.de/114142/
Document Type:Conference or Workshop Item (Speech)
Title:Recent developments in operational modal analysis for ground and flight vibration testing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623
Schwochow, Janjan.schwochow (at) dlr.deUNSPECIFIED
Jelicic, G.goran.jelicic (at) dlr.dehttps://orcid.org/0000-0001-5091-6699
Govers, YvesYves.Govers (at) dlr.dehttps://orcid.org/0000-0003-2236-596X
Date:25 June 2017
Journal or Publication Title:Proceedings of the International Forum on Aeroelasticity and Structural Dynamics (IFASD 2017)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
ISBN:978-88-97576-28-0
Status:Published
Keywords:ground vibration testing, taxi vibration testing, flight vibration testing, output-only modal analysis, online monitoring, parameter-varying systems
Event Title:IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics
Event Location:Como, Italien
Event Type:international Conference
Event Dates:25.-28. Jun. 2017
Organizer:Politechnico Milano, Department of Aerospace Science and Technology
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:25 Sep 2017 15:23
Last Modified:25 Sep 2017 15:43

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