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Microvibrations induced by a cantilevered wheel assembly with a soft-suspension system

Zhang, Z, Aglietti, GS and Zhou, W (2011) Microvibrations induced by a cantilevered wheel assembly with a soft-suspension system AIAA Journal, 49 (5). pp. 1067-1079.

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Abstract

Microvibration management onboard spacecraft with high stability requirements has drawn increasing interest from engineers and scientists, and this paper discusses a reaction wheel design that allows a significant reduction of mid- to high-frequency microvibrations and that has been practically implemented in industry. Disturbances typically induced by mechanical systems onboard a spacecraft (especially rotating devices such as reaction wheel assemblies and momentum wheel assemblies) can severely degrade the performance of sensitive instruments. Traditionally, wheel-induced high-frequency (over 100-200 Hz) vibrations, generated by a combination of phenomena from bearing noise to dynamic amplifications due to internal resonances, are especially difficult to control. In this paper, the dynamic behavior of a newly designed wheel assembly, with a cantilevered flywheel configuration supported by a soft-suspension system, is investigated. The wheel assembly's mathematical model is developed and later verified with vibration tests. Wheel-assembly-induced lateral and axial microvibrations are accurately measured using a seismic-mass microvibration measurement system, which represents an alternative to typical microvibration measurement setups. Finally, the performance of this wheel assembly in terms of microvibration emissions is compared with a traditional design (with a rigid suspension) through comparison of frequency spectra, and it is shown that this design produces significantly lower vibrations at high frequency. Copyright © 2010 by Zhe Zhang.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Surrey Space Centre
Authors :
AuthorsEmailORCID
Zhang, ZUNSPECIFIEDUNSPECIFIED
Aglietti, GSUNSPECIFIEDUNSPECIFIED
Zhou, WUNSPECIFIEDUNSPECIFIED
Date : May 2011
Identification Number : 10.2514/1.J050791
Additional Information : ©2011 American Institute of Aeronautics and Astronautics
Depositing User : Symplectic Elements
Date Deposited : 24 Jan 2014 10:23
Last Modified : 09 Jun 2014 13:53
URI: http://epubs.surrey.ac.uk/id/eprint/805000

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