Abstract
This paper presents probabilistic analysis of a system comprised of a robot and its associated safety mechanism. The system can have various modes of failures and is repaired upon failure. The system failure rates other than the common-cause failure rate are assumed constant and the failed system repair times are assumed arbitrarily distributed. Three techniques are combined to perform analysis: Markov, the device of stages method, and the supplementary variable approach. Expressions along with plots for the robot system availability and state probabilities are presented.
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