Affiliations: The Second Artillery Equipment Academy, Beijing, China | College of Aerospace and Material Engineering,
National University of Defense Technology, ChangSha, Hunan, China
Note: [] Corresponding author: Weiyong Zhou, The Second Artillery Equipment Academy, Beijing, 10085, China.
E-mail: [email protected]
Abstract: 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.
