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Experimental and numerical investigation of coupled microvibration dynamics for satellite reaction wheels

Addari, D, Aglietti, GS and Remedia, M (2017) Experimental and numerical investigation of coupled microvibration dynamics for satellite reaction wheels Journal of Sound and Vibration, 386. pp. 225-241.

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Abstract

Microvibrations of a satellite reaction wheel assembly are commonly analysed in either hard-mounted or coupled boundary conditions, though coupled wheel-to-structure disturbance models are more representative of the real environment in which the wheel operates. This article investigates the coupled microvibration dynamics of a cantilever configured reaction wheel assembly mounted on either a stiff or flexible platform. Here a method is presented to cope with modern project necessities: (i) need of a model which gives accurate estimates covering a wide frequency range; (ii) reduce the personnel and time costs derived from the test campaign, (iii) reduce the computational effort without affecting the quality of the results. The method involves measurements of the disturbances induced by the reaction wheel assembly in a hard-mounted configuration and of the frequency and speed dependent dynamic mass of the reaction wheel. In addition, it corrects the approximation due to missing speed dependent dynamic mass in conventional reaction wheel assembly microvibration analysis. The former was evaluated experimentally using a previously designed and validated platform. The latter, on the other hand, was estimated analytically using a finite element model of the wheel assembly. Finally, the validation of the coupled wheel-structure disturbance model is presented, giving indication of the level of accuracy that can be achieved with this type of analyses.

Item Type: Article
Subjects : Electronic Engineering
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Addari, DUNSPECIFIEDUNSPECIFIED
Aglietti, GSUNSPECIFIEDUNSPECIFIED
Remedia, MUNSPECIFIEDUNSPECIFIED
Date : 6 January 2017
Identification Number : 10.1016/j.jsv.2016.10.003
Copyright Disclaimer : © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Microvibration; Dynamic coupling; Dynamic mass; Reaction wheel assembly
Depositing User : Symplectic Elements
Date Deposited : 02 Nov 2016 10:54
Last Modified : 31 Oct 2017 18:53
URI: http://epubs.surrey.ac.uk/id/eprint/812703

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