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ERA Modal Identification Experiences with Mini-Mast.

Pappa, R. S. (1) and Schenk, A. and Noll, C. (2) (1990) ERA Modal Identification Experiences with Mini-Mast. In: Proceedings., pp. 331-369. 2nd USAF/NASA Workshop System Identification and Health Monitoring of Precision Space Structures, 27-29 March 1990, California Institute of Technology - Pasadena, CA, U.S.A..

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Abstract

This paper summarizes work performed under a collaborative research effort between NASA and the German Aerospace Research Establishment (DLR). The objective is to develop improved understanding of the practical performance characteristics of system identification procedures for large space sructures. Results obtained using the ERA modal identification technique applied to frequency response functions from Mini-Mast are discussed. Mini-Mast is a 20-meter long generic space truss located at NASA Langley, and it serves as the first ground testbed for the CSI Guest Investigator program. Data for ERA are obtained by inverse Fourier transformation of frequency response functions generated using modern, multiple-input random excitation techniques. Modal identification proved to be difficult for this large, deployable truss structure. Techniques for optimizing accuracy and for assessing identification uncertainty and sensitivity are shown.

Document Type:Conference or Workshop Item (Paper)
Additional Information: institution=US Air Force and NASA JPL, LIDO-Berichtsjahr=1990,
Title:ERA Modal Identification Experiences with Mini-Mast.
Authors:
AuthorsInstitution or Email of Authors
Pappa, R. S. (1)UNSPECIFIED
Schenk, A.UNSPECIFIED
Noll, C. (2)UNSPECIFIED
Date:1990
Journal or Publication Title:Proceedings.
Page Range:pp. 331-369
Status:Published
Keywords:Modal Identification, Eigensystem Realization Algorithm (ERA), Mini-Mast Space Truss, Random Excitation, Input Analysis, Sliding Window Technique
Event Title:2nd USAF/NASA Workshop System Identification and Health Monitoring of Precision Space Structures, 27-29 March 1990, California Institute of Technology - Pasadena, CA, U.S.A.
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 10:41

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