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Simulation of On-Orbit Modal Identification.

Schenk, A. (1990) Simulation of On-Orbit Modal Identification. In: Proceedings of the 41st Congress of the International Astronautical F ederation. 41st Congress of the International Astronautical Federation, 6-12 Oct ober 1990, Dresden, Vortragsnummer: IAF 90-293.

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Abstract

Modularly designed large orbital systems cannot be tested as a total structure on earth. Size, zero-g design and the existing atmosphere conflict with traditional structural dynamic qualification. In order to avoid the associated problems with terrestrial testing some form of on-orbit testing is likely to be used. This paper focuses on two objectives: (1) a brief discussion of hardware concerns, particularly under space conditions and (2) the demonstration of one specific software tool for on-orbit modal testing. Results extracted with the Ibrahim Time Domain method from noisy responses of an analytical structure are presented. Challenges of the used problem for system identification are: a frequency bandwidth enclosing two orders of magnitude, two frequency clusters and one mode with relatively high damping. With few exceptions, all results are within predefined "assessment margins" of 2 % for frequencies and 10 % for damping and mode shapes.

Document Type:Conference or Workshop Item (Paper)
Additional Information: institution=International Astronautical Federation (IAF), LIDO-Berichtsjahr=1990, pages=12,
Title:Simulation of On-Orbit Modal Identification.
Authors:
AuthorsInstitution or Email of Authors
Schenk, A.UNSPECIFIED
Date:1990
Journal or Publication Title:Proceedings of the 41st Congress of the International Astronautical F ederation
Status:Published
Keywords:On-Orbit Modal Identification, Controllability, Observability, Ibrahi m Time Domain Method (ITD)
Event Title:41st Congress of the International Astronautical Federation, 6-12 Oct ober 1990, Dresden, Vortragsnummer: IAF 90-293
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:42

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