Dynamic coupling on the design of space structures

Garcia Perez, Andres and Sanz Andres, Angel Pedro and Alonso Rodrigo, Gustavo and Chimeno Manguan, Marcos (2018). Dynamic coupling on the design of space structures. "Aerospace Science and Technology" (n. 84); pp. 1035-1048. ISSN 1270-9638. https://doi.org/10.1016/j.ast.2018.11.045.

Description

Title: Dynamic coupling on the design of space structures
Author/s:
  • Garcia Perez, Andres
  • Sanz Andres, Angel Pedro
  • Alonso Rodrigo, Gustavo
  • Chimeno Manguan, Marcos
Item Type: Article
Título de Revista/Publicación: Aerospace Science and Technology
Date: 2018
ISSN: 1270-9638
Subjects:
Freetext Keywords: 2-DOF; Dynamic coupling; Natural frequency; Modal analysis; Space structures; UPMSat-2
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

For the design of space structures, the dynamic coupling between equipment and the satellite (or between a satellite and the launcher) is usually avoided due to negative effects like high stresses produced by structural resonance. The usual procedure to assure the dynamic decoupling is by limiting the minimum value of natural frequency of the secondary structure to a value high enough above the main natural frequencies of the main structure. However, in some spacecraft configurations, it is unavoidable that some parts or equipment present natural frequencies close to the main natural frequencies of the spacecraft because these parts may be massive or may have a special interface design with low stiffness. This dynamic coupling provokes modifications on the modal behavior of the satellite, which can lead to a significant decrease in the first natural frequency of the entire satellite. To analyze this phenomenon, a representative but simple mathematical model is studied to evaluate the influence of the design parameters of space structures. Analytical expressions are obtained that can help to highlight the influence of the parameters. The results are demonstrated with the example of the UPMSat-2 satellite design.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainESP2015-65064-C2-2-PUnspecifiedUnspecifiedCaracterización y análisis de la atmosfera de marte. Explotación científica del instrumento NOMAD de la misión TGO-Exomars

More information

Item ID: 54996
DC Identifier: https://oa.upm.es/54996/
OAI Identifier: oai:oa.upm.es:54996
DOI: 10.1016/j.ast.2018.11.045
Official URL: https://www.sciencedirect.com/science/article/abs/pii/S1270963818312586
Deposited by: Memoria Investigacion
Deposited on: 22 Mar 2021 06:53
Last Modified: 22 Mar 2021 06:53
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