Copula-Based Approach to Reliability Analysis of Phased-Mission Systems

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Srivastava Preeti Wanti; Rani Satya

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Journal Paper

Paper Information

Journal: International Journal of Reliability, Risk and Safety: Theory and Application Year:2022 | Volume:5 | Issue:2 Page(s): 49-62

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Information Journal Paper

Title

Copula-Based Approach to Reliability Analysis of Phased-Mission Systems

Author(s)

Srivastava Preeti Wanti | Rani Satya | Issue Writer Certificate

Keywords

Copulas

cumulative exposure model

phased-mission system

Reliability

reliability importance measure

Abstract

A phased-mission system (PMS) involves several different tasks or phases that must be accomplished in sequence. The system configuration, task success criteria, and component failure characteristics may vary from phase to phase. Consequently, the Reliability evaluation of PMSs is more challenging than that of single-phase in the field of system Reliability analysis. The paper deals with the Reliability evaluation of non-repairable phased-mission systems with three phases and five phases involving dependent components in each phase. The cumulative exposure model has been used to model a PMS, and the dependency between components of a system in a phase is modeled using the Gumbel-Hougaard copula. Reliability importance analyses of the 3-PMS and 5-PMS have also been carried out. The method developed has been illustrated using numerical examples. The proposed methodology can also be generalized to PMSs with more than five phases.

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