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A methodology for modeling the mechanical interaction between a reaction wheel and a flexible structure

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dc.contributor.author Elias, L. M.
dc.contributor.author Dekens, F. en_US
dc.contributor.author Basdogan, I. en_US
dc.contributor.author Sievers, L. en_US
dc.contributor.author Neville, T. en_US
dc.date.accessioned 2004-11-09T23:03:01Z
dc.date.available 2004-11-09T23:03:01Z
dc.date.issued 2002-08-22 en_US
dc.identifier.citation Atronomical Telescopes and Instrumentation en_US
dc.identifier.citation Waikoloa, HI, USA en_US
dc.identifier.clearanceno 02-1990 en_US
dc.identifier.uri http://hdl.handle.net/2014/37177
dc.description.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 space-craft. 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. en_US
dc.format.extent 3884961 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other vibration analysis en_US
dc.title A methodology for modeling the mechanical interaction between a reaction wheel and a flexible structure en_US


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