Microvibration Model Development and Validation of a Cantilevered Reaction Wheel Assembly


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Reaction wheel assemblies are one of the most important microvibration sources on typical modern satellites. In this paper microvibrations induced by a cantilevered reaction wheel assembly are modelled and validated against microvibration test results. The disturbance model is developed using energy method. A microvibration measurement platform is designed to measure its disturbances. Disturbance test results are analyzed in detail. The peculiar dynamic characteristics such as nonlinearity and high damping of harmonic responses in the test results are discussed. Estimations of damping values used in the disturbance model are introduced. A new method developed to model harmonic excitations is discussed. Furthermore, novel methods to identify harmonics and extract model parameters from test results are presented. The empirical modeling method developed for broadband noise excitations are also introduced and validated.



Edited by:

Chunliang Zhang and Paul P. Lin




Z. Zhang et al., "Microvibration Model Development and Validation of a Cantilevered Reaction Wheel Assembly", Applied Mechanics and Materials, Vols. 226-228, pp. 133-137, 2012

Online since:

November 2012




[1] Z. Zhang, G.S. Aglietti, and W.Y. Zhou: Microvibrations Induced by a Cantilevered Wheel Assembly with a Soft-Suspension System, AIAA Journal Vol. 49, No. 5, 2011, pp.1067-1079.

DOI: https://doi.org/10.2514/1.j050791

[2] Z. Zhang and G.S. Aglietti: Coupled Disturbance Modeling and Validation of a Reaction Wheel Model, ECSSMET, ESA, (2012).