Development of multi-degree-of-freedom microvibration emulator for efficient jitter test of spacecraft

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A number of components and payload systems installed in satellites are found to be exposed to various disturbance sources, such as the reaction wheel assembly, the control moment gyro, coolers, and others. Low damping in space causes continuous microvibration that degrades the performance of various payload systems; this is customarily called jitter problem in spacecraft community. Various isolation systems have been developed to improve the performance of the optical payloads under the microvibration environments. During the spacecraft development process, an experimental validation of jitter effects (either controlled or not) on the performance of optical payloads using all the flight model components is not often conducted due to the scheduling issue or the product assurance activities. The disturbance characteristics of a prototype or an engineering model of the disturbance source such as reaction wheel assembly are significantly different from their flight model counterparts. Therefore, in order to facilitate jitter test as well as the performance evaluations of an isolator during the satellite development process, this article proposes a microvibration emulator that generates the real disturbance spectrums of flight models. The development procedure for the reaction wheel assembly emulator is described. Prototype single-axis and three-axis microvibration emulators are demonstrated, and the performances are evaluated by means of disturbance characteristics similar to those of the reaction wheel assembly.
Publisher
SAGE PUBLICATIONS LTD
Issue Date
2014-06
Language
English
Article Type
Article
Keywords

ACTIVE VIBRATION CONTROL; ISOLATION SYSTEM

Citation

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, v.25, no.9, pp.1069 - 1081

ISSN
1045-389X
DOI
10.1177/1045389X14523852
URI
http://hdl.handle.net/10203/187411
Appears in Collection
AE-Journal Papers(저널논문)
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