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Stochastic analysis of a maintainable robot‐safety system with common‐cause failures

Stochastic analysis of a maintainable robot‐safety system with common‐cause failures This paper presents reliability and availability analyses of a robot‐safety system having one robot and n ‐redundant safety units with common‐cause failures. The system failure rates and the partially failed system repair rates are assumed constant, and the failed system repair time is assumed arbitrarily distributed. Markov and the supplementary variable methods were used to perform mathematical analysis of this model. Generalized expressions for state probabilities, system availabilities, reliability, mean time to failure, and variance of time to failure are developed. Some plots of these expressions are shown. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Quality in Maintenance Engineering Emerald Publishing

Stochastic analysis of a maintainable robot‐safety system with common‐cause failures

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Publisher
Emerald Publishing
Copyright
Copyright © 2004 Emerald Group Publishing Limited. All rights reserved.
ISSN
1355-2511
DOI
10.1108/13552510410539204
Publisher site
See Article on Publisher Site

Abstract

This paper presents reliability and availability analyses of a robot‐safety system having one robot and n ‐redundant safety units with common‐cause failures. The system failure rates and the partially failed system repair rates are assumed constant, and the failed system repair time is assumed arbitrarily distributed. Markov and the supplementary variable methods were used to perform mathematical analysis of this model. Generalized expressions for state probabilities, system availabilities, reliability, mean time to failure, and variance of time to failure are developed. Some plots of these expressions are shown.

Journal

Journal of Quality in Maintenance EngineeringEmerald Publishing

Published: Jun 1, 2004

Keywords: Maintenance; Robotics; Systems engineering; Safety; Reliability management; Failure (mechanical)

References