Affiliation of Author(s):航天学院

Journal:CHINESE JOURNAL OF AERONAUTICS

Key Words:Agile spacecraft Control moment gyro Singularity analysis Space expansion method Steering strategy

Abstract:Control Moment Gyroscope (CMG) is an effective candidate for agile satellites and large spacecraft attitude control because of its powerful torque amplification capability. The most serious situation, however, in using CMG is the inherent geometric singularity problem, where there's no torque output along a particular direction. Space expansion method has been proposed in this work for the singularity analysis. Based on inverse mapping transformation, an expanded Jacobian matrix which is a full rank square matrix is obtained. The singular angle sets of the 3-parallel cluster and pyramid cluster are distinguished using space expansion method. An effective hybrid steering strategy, able to deal with the elliptic singularity, is further proposed. Simulation results demonstrate the excellent performance of the proposed steering logic compared to the generalized singular robust logic and pseudo inverse logic in terms of energy consumption and torque error. (C) 2018 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC-BY-NC-ND license.

ISSN No.:1000-9361

Translation or Not:no

Date of Publication:2018-04-01

Co-author:韩锋,hb,Chen Zhiming,Guo Yufeng

Correspondence Author:wyh