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Modal identification of a deployable space trussWork performed under a collaborative research effort between NASA and the German Aerospace Research Establishment (DLR) is summarized. The objective is to develop and demonstrate advanced technology for system identification of future large space structures. Recent experiences using the eigensystem realization algorithm (ERA) for modal identification of Mini-Mast are reported. Mini-Mast is a 20-meter-long deployable space truss used for structural dynamics and active-vibration control research at the NASA Langley Research Center. Due to nonlinearities and numerous local modes, modal identification of Mini-Mast proved to be surprisingly difficult. Methods available with ERA for obtaining detailed, high-confidence results are illustrated.
Document ID
19910010161
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schenk, Axel (Deutsche Forschungs- und Versuchsanstalt fuer Luft- und Raumfahrt, Goettingen, Germany F.R. , United States)
Pappa, Richard S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1990
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.15:102720
NASA-TM-102720
Meeting Information
Meeting: International Seminar on Modal Analysis and Structural Dynamics
Location: Leuven
Country: Belgium
Start Date: September 17, 1990
End Date: September 21, 1990
Accession Number
91N19474
Funding Number(s)
PROJECT: RTOP 590-14-61-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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