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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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.|
|Journal or Publication Title:||Proceedings of the 41st Congress of the International Astronautical F ederation|
|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:||no assignment|
|HGF - Program Themes:||no assignment|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|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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