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Proceedings Paper

Methodology for modeling the mechanical interaction between a reaction wheel and a flexible structure
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Paper Abstract

This paper presents a modeling methodology used to predict the performance of a flexible structure, such as a space telescope, in the presence of an on-board vibrational disturbance source, such as a reaction wheel assembly (RWA). Both decoupled and coupled analysis methods are presented. The decoupled method relies on blocked RWA disturbances, measured with the RWA hardmounted to a rigid surface. The coupled method corrects the blocked RWA disturbance boundary conditions using 'force filters' which depend on estimates of the interface accelerances of the RWA and spacecraft. Both methods were validated on the Micro-Precision Interferometer testbed at the Jet Propulsion Laboratory. Experimental results are encouraging, indicating that both methods provide sufficient accuracy compared to measured values; however, the coupled method provides the best results when the gyroscopic nature of the spinning RWA is captured in the RWA accelerance model. Additionally, the RWA disturbance cross spectral density terms are found to be influential.

Paper Details

Date Published: 26 February 2003
PDF: 15 pages
Proc. SPIE 4852, Interferometry in Space, (26 February 2003); doi: 10.1117/12.460875
Show Author Affiliations
Laila Mireille Elias, Massachusetts Institute of Technology (United States)
Frank G. Dekens, Jet Propulsion Lab. (United States)
Ipek Basdogan, Jet Propulsion Lab. (United States)
Lisa A. Sievers, Jet Propulsion Lab. (United States)
Timothy Neville, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 4852:
Interferometry in Space
Michael Shao, Editor(s)

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