Transactions of the Society of Instrument and Control Engineers
Online ISSN : 1883-8189
Print ISSN : 0453-4654
ISSN-L : 0453-4654
Fault-Tolerance of Control Systems with Dihedral Group Symmetry
Reiko TANAKAKazuo MUROTA
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1999 Volume 35 Issue 6 Pages 806-813

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Abstract
This paper deals with the fault-tolerance of systems that are symmetric with respect to the dihedral group Dm. The group Dm generally represents the geometric symmetry of a regular m-gon. We reveal the underlying mathematical mechanism of the loss of controllability for Dm-symmetric systems induced by failures and derive a necessary and sufficient condition to retain the controllability despite a failure. Moreover, we show the minimum number of functioning modules needed to retain the controllability despite the failures. It serves for a quantitative evaulation of fault-tolerance.
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