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Modal Identification of PPF/ENVISAT-1 Flight Model -Workpackage 1-

Füllekrug, U. and Degener, M. (2000) Modal Identification of PPF/ENVISAT-1 Flight Model -Workpackage 1-. Project Report, DLR-Interner Bericht. 232-2000 C 06. 32 S.

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Dynamic acceptance tests with the PPF/ENVISAT-1 Flight Model are planned to be performed in August 2000. As it is required to check and validate the structural dynamics model, it is desired to identify the modal parameters. First, the theory and the basic principles of modal identification by multi-axial base excitation are described. A frequency domain method, which is best suited for a general and reliable modal identification, is described in detail and the required steps for performing a modal identification are summarized. Recommendations are given for the performance of the base excitation tests. Also the proposed measurement point plan is reviewed. Apart from the lack of additional measurement points on the spacecraft core structure, which would allow a better global mode assessment, the measurement point plan seems to be adequate for modal identification. In order to have an alternative in case of difficulties with the HYDRA performance, a complementary modal identification method is proposed and described. The additional modal survey test shall be performed in a simplified manner with one single electrodynamic exciter.

Item URL in elib:https://elib.dlr.de/14220/
Document Type:Monograph (Project Report, DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=2000,
Title:Modal Identification of PPF/ENVISAT-1 Flight Model -Workpackage 1-
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:32
Keywords:Structural Dynamics, Modal Analysis, Base Excitation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W SY - Technik für Raumfahrtsysteme
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:34

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