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Shock and Vibration
Volume 20 (2013), Issue 4, Pages 737-748

Improving Performance of Cantilevered Momentum Wheel Assemblies by Soft Suspension Support

Weiyong Zhou1 and Dongxu Li2

1The Second Artillery Equipment Academy, Beijing, China
2College of Aerospace and Material Engineering, National University of Defense Technology, ChangSha, Hunan, China

Received 19 February 2012; Revised 24 January 2013; Accepted 29 January 2013

Copyright © 2013 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper focuses on improving the performance of the rigid support cantilevered momentum wheel assemblies (CMWA) by soft suspension support. A CMWA, supported by two angular contact ball bearings, was modeled as a Jeffcott rotor. The support stiffness, before and after in series with a linear soft suspension support, were simplified as two Duffing's type springs respectively. The result shows that the rigid support CMWA produces large disturbance force at the resonance speed range. The soft suspension CMWA can effectively reduce the force on the bearing (also disturbance forces produced by the CMWA) at high rotational speed, and also reduce the nonlinear characteristic of the stiffness. However, the instability of the soft suspension CMWA will limit the maximum rotational speed of the CMWA. Thus, a "proper" stiffness of the soft suspension system is a trade-off strategy between reduction of the force and extension of the speed range simultaneously.