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

Microvibrations induced by a cantilevered wheel assembly with a soft-suspension system
Microvibrations induced by a cantilevered wheel assembly with a soft-suspension system
Microvibration management onboard spacecraft with high stability requirements has drawn increasing interest from engineers and scientists; and this article discusses a Reaction Wheel design which 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 andmomentum wheel assemblies) can severely degradethe performance of sensitive instruments. Traditionally, wheel-induced high-frequency (over 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 acantilevered flywheel configuration supported by a soft-suspension system, is investigated. The wheel assembly’smathematical model is developed and later verified with vibration tests. Wheel-assembly-induced lateral and axial Q4 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
0001-1452
1067-1079
Zhang, Zhe
361db637-2b55-4cad-a0d4-9042f16617d5
Aglietti, G.S.
e44d0dd4-0f71-4399-93d2-b802365cfb9e
Zhou, Wei Yong
1de2f427-d56c-4e21-91e3-88850ea1d97f
Zhang, Zhe
361db637-2b55-4cad-a0d4-9042f16617d5
Aglietti, G.S.
e44d0dd4-0f71-4399-93d2-b802365cfb9e
Zhou, Wei Yong
1de2f427-d56c-4e21-91e3-88850ea1d97f

Zhang, Zhe, Aglietti, G.S. and Zhou, Wei Yong (2011) Microvibrations induced by a cantilevered wheel assembly with a soft-suspension system. AIAA Journal, 49 (5), 1067-1079. (doi:10.2514/1.J050791).

Record type: Article

Abstract

Microvibration management onboard spacecraft with high stability requirements has drawn increasing interest from engineers and scientists; and this article discusses a Reaction Wheel design which 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 andmomentum wheel assemblies) can severely degradethe performance of sensitive instruments. Traditionally, wheel-induced high-frequency (over 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 acantilevered flywheel configuration supported by a soft-suspension system, is investigated. The wheel assembly’smathematical model is developed and later verified with vibration tests. Wheel-assembly-induced lateral and axial Q4 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

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Published date: May 2011
Organisations: Astronautics Group

Identifiers

Local EPrints ID: 179379
URI: http://eprints.soton.ac.uk/id/eprint/179379
ISSN: 0001-1452
PURE UUID: b275b412-6f01-4e3a-be02-491ac773a593

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Date deposited: 01 Apr 2011 08:38
Last modified: 14 Mar 2024 02:48

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Contributors

Author: Zhe Zhang
Author: G.S. Aglietti
Author: Wei Yong Zhou

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