Dynamic interaction of rotating momentum wheels with spacecraft elements

Narayan, Shankar S and Nair, PS and Ghosal, Ashitava (2008) Dynamic interaction of rotating momentum wheels with spacecraft elements. In: Journal of Sound and Vibration, 315 (4-5). pp. 970-984.

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Abstract

In modern spacecraft with the requirement of increased accuracy of payloads, the on-orbit structural dynamic behavior of spacecraft is increasingly influencing the design and performance of spacecraft. During the integrated spacecraft testing of one of the satellites, a strong coupling between rotating momentum wheels and an earth sensor was detected. This resulted in corruption of the earth sensor data at certain wheel speeds. This paper deals with the dynamic coupling problem of a rotating momentum wheel with its support brackets affecting other subsystems of spacecraft. As part of this investigation, extensive modal tests and vibration tests were carried out on the momentum wheel bracket assembly with wheels in stationary and rotating conditions. It was found that the effects of gyroscopic forces arising out of rotating wheels are significant and this aspect needs to be taken into account while designing the mounting brackets. Results of analysis and tests were used to redesign the bracket leading to a significant reduction in the interaction and associated problems. A procedure for design of a support structure using a low-order mathematical model is also shown.

Item Type:	Journal Article
Publication:	Journal of Sound and Vibration
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	06 Aug 2008
Last Modified:	28 Dec 2010 07:44
URI:	http://eprints.iisc.ac.in/id/eprint/15467

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