Singularity Avoidance of Variable Speed Control Moment Gyros by Optimization Approach

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Singularity avoidance steering laws for control momentum gyros (CMGs) and variable speed control moment gyros (VSCMGs) are addressed. The proposed methodology is based on a constrained optimization by minimizing a cost function which consists of a singularity index and a kinetic energy term. The new singularity avoidance law prevents CMG/VSCMG clusters from encountering a singularity condition. It turns out that the proposed optimal CMG steering law is in a general form including the conventional null motion solution. Also, an optimal steering law is developed to overcome the wheel speed saturation problem during the operation of VSCMG clusters. The performance of the new steering law is demonstrated through a simulation study with a three-parallel single-gimbal CMG/VSCMG cluster.
Publisher
American Astronautical Society
Issue Date
2007-01
Keywords

Singularity avoidance; VSCMG; Optimization Approach

Citation

The Journal of the Astronautical Sciences, Vol.55, No.1, pp.67-84

ISSN
0021-9142
URI
http://hdl.handle.net/10203/25279
Appears in Collection
AE-Journal Papers(저널논문)

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