Abstract
We present a constrained steering law of pyramid type Control Moment Gyros (CMGs) and detail its procedure and implementation. This steering law uses a constraining relation of four input variables of the CMG system and solves nonredundant kinematics. Though the angular momentum workspace of this method is rather smaller than the original maximum workspace, singularity avoidance is assured, and this steering law is much simpler than usual steering laws. This method can be applied to steering of four out of six unit system of a MIR-type CMG system. Advantages of this steering law were verified in comparison with a gradient method and an SR-inverse steering law by using a ground test facility which simulated spacecraft motion. In addition, operational modes of the law and a mode-changing procedure were experimentally evaluated. (Author)
Published Version
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