Title: Design of passive launch and on-orbit vibration isolation system for control moment gyroscopes

Authors: Min Luo; Qiong Wu; Wenbo Luo; Wentao Yang

Addresses: Beijing Key Laboratory of Intelligent Space Robotic System Technology and Applications, Beijing Institute of Spacecraft System Engineering, Beijing 100094, China ' Beijing Institute of Spacecraft System Engineering, Beijing 100094, China ' Beijing Institute of Spacecraft System Engineering, Beijing 100094, China ' Beijing Institute of Spacecraft System Engineering, Beijing 100094, China

Abstract: This paper proposes a robust design of a passive nonlinear viscous damping system, which is capable of not only isolating disturbances induced by control moment gyroscopes (CMGs) but also reducing the launch loads transmitted to CMGs. A novel and robust design of viscous damper is developed in the current work, which can provide high damping for launch dynamic loading and low damping for on-orbit micro-vibration loading. In order to understand the nonlinear damping mechanisms of such a viscous damper, a theoretical analysis based on power-law fluid theory is given in this paper. The nonlinear effect and performance of the isolation system are demonstrated by launch environment tests and micro-vibration tests. The test results indicate that the isolation system guarantees the dynamic safety of CMGs under the launch environment and the micro-vibration isolation efficiency of CMGs on orbit.

Keywords: control moment gyroscope; CMG; launch vibration isolation; on-orbit vibration isolation; nonlinear viscous damping.

DOI: 10.1504/IJSPACESE.2019.105058

International Journal of Space Science and Engineering, 2019 Vol.5 No.4, pp.355 - 368

Received: 22 Jul 2019
Accepted: 27 Aug 2019
Published online: 11 Feb 2020 *

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