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Comparison of Different Methods of Modal Test on a Spacecraft Representative Structure

Singal, R.K. and Vigneron, F.R. and Steele, T. and Bertram, A. and Degener, M. (1991) Comparison of Different Methods of Modal Test on a Spacecraft Representative Structure. The International Journal of Anlytical and Experimental Modal Analysis., No. 3, pp. 175-187.

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FLECS designed and manufactured by ESTEC represents a typical modular spacecraft in terms of mass properties and modal density. The structures is well suited as a test item for the validation of dynamic identification methods and was therefore selected for the comparison of the following test methods, the phase resonance method with appropriated excitation (for every eigenmode an exciter force distribution is found which compensates the damping forces of the structure), the mode separation method with excitation at various locations on the structure with complex exponential and a driven-base method with undirectional base excitation. Since the structural damping level of FLECS is low compared to actual fully equipped satellite structures the modal identification methods were also applied to a configuration of FLECS with supplemental non-proportional viscous damping. For this purpose dampers were manufactured and integrated into the FLECS structure. This paper describes briefly the experience in applying the methods and compares the results.

Item URL in elib:https://elib.dlr.de/39466/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=1991,
Title:Comparison of Different Methods of Modal Test on a Spacecraft Representative Structure
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Singal, R.K.Canadian Space Agency CSAUNSPECIFIED
Bertram, A.Interkeller AG, ZürichUNSPECIFIED
Journal or Publication Title:The International Journal of Anlytical and Experimental Modal Analysis.
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:No. 3
Page Range:pp. 175-187
Keywords:Phase Resonance, Mode Separation, Driven-Base, ISSPA, FLECS, Modal Survey.
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Space
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:44

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