Probabilistic analysis of a repairable robot-safety system composed of ( n -1) standby robots, a safety unit, and a switch

Author： Dhillon Balbir S.   Cheng Shen  

Publisher： Emerald Group Publishing Ltd

ISSN： 1355-2511

Source： Journal of Quality in Maintenance Engineering, Vol.14, Iss.3, 2008-08, pp. : 306-323

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Purpose ‐ The purpose of this paper is to study reliability, availability, and mean time to failure of a repairable robot-safety system composed of (n-1) standby robots, a safety unit, and a switch. Design/methodology/approach ‐ Generalized expressions for system state probabilities, system availability, reliability, and mean time to failure are developed when the failure rates of robot and safety unit are constant and the failed system repair times are arbitrarily distributed. Supplementary variable and Markov methods were used to develop these expressions. Findings ‐ This study clearly demonstrates that standby robots and the repair process help to improve system availability. Practical implications ‐ This study will help maintenance engineers and reliability practitioners to become aware of the combined effect of standby robots and the repair process on the performance of the robot-safety system. Consequently, they will make better maintenance related decisions in organizations such as automobile manufacturers that use robots quite frequently. Originality/value ‐ This paper has studied the effects of having redundant robots and the repair facilities on the performance of a robot-safety system with perfect mechanism to turn on a standby robot. This is one of the first attempts to study the combined effects of all these factors on a robot-safety system.

Related content

Reliability and availability analysis of a robot-safety system

By Cheng Shen   Dhillon B.S.  

Journal of Quality in Maintenance Engineering, Vol. 17, Iss. 2, 2011-05 ,pp. : 203-232 (30)

Emerald Group Publishing Ltd

Access to resources Recommend Favorite

Overall availability and risk analysis of a general robot–safety device system

By Vanderperre Edmond J.   Makhanov Stanislav S.  

International Journal of Systems Science, Vol. 46, Iss. 10, 2015-07 ,pp. : 1889-1896 (8)

Taylor & Francis Ltd

Access to resources Recommend Favorite

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

By Dhillon B.S.   Li Zhijian  

Journal of Quality in Maintenance Engineering, Vol. 10, Iss. 2, 2004-02 ,pp. : 136-147 (12)

Emerald Group Publishing Ltd

Access to resources Recommend Favorite

Reliability analysis of a repairable robot system

By Dhillon B.S.   Yang N  

Journal of Quality in Maintenance Engineering, Vol. 2, Iss. 2, 1996-02 ,pp. : 30-37 (8)

Emerald Group Publishing Ltd

Access to resources Recommend Favorite

Probabilistic safety analysis of maintainable systems

By Dhillon B.S.   Kirmizi Fahri  

Journal of Quality in Maintenance Engineering, Vol. 9, Iss. 3, 2003-08 ,pp. : 303-320 (18)

Emerald Group Publishing Ltd

Access to resources Recommend Favorite