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Practical Aspects of On-Orbit Modal Identification Using Free-Decay Data.

Schenk, A. and Pappa, R.S. (1) (1991) Practical Aspects of On-Orbit Modal Identification Using Free-Decay Data. In: ESA SP-321, October 1991, pp. 609-617. Internat. Conf.: 'Spacecraft Structures and Mechanical Testing', Noordwijk, The Netherlands, 24-26 April 1991..

Full text not available from this repository.

Abstract

Future large space structures such as Space Station Freedom cannot be tested as a total structure on earth. Size, zero-g design, and the existing atmosphere conflict with traditional structural dynamic testing. On-orbit modal identification will become necessary. This paper discusses practical aspects of performing such tests using time-domain analysis of free-decay data. The effects of environmental constraints, structural characteristics, and excitation and sensing are reviewed. A recent laboratory application is also discussed. In this test, an on-orbit experiment is simulated using free-decay data and a limited number of excitationand measurement points. The test article is dynamically similar to the truss/solar arrays of Space Station. The identified modal parameters from this simulation correlate well, though not uniquely, with those obtained in a complete modal survey. Practical difficulties in performing the correlation are illustrated. Modal parameters are identified with the Eigensystem Realization Algorithm.

Item URL in elib:https://elib.dlr.de/39456/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1991, pages=9,
Title:Practical Aspects of On-Orbit Modal Identification Using Free-Decay Data.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schenk, A.UNSPECIFIEDUNSPECIFIED
Pappa, R.S. (1)UNSPECIFIEDUNSPECIFIED
Date:1991
Journal or Publication Title:ESA SP-321, October 1991
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 609-617
Status:Published
Keywords:Large Space Structures, On-Orbit Modal Identification, Free-Decay Data, Controllability, Observability, Eigensystem Realization Algorithim (ERA).
Event Title:Internat. Conf.: 'Spacecraft Structures and Mechanical Testing', Noordwijk, The Netherlands, 24-26 April 1991.
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: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:43

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