Journal
RELIABILITY ENGINEERING & SYSTEM SAFETY
Volume 164, Issue -, Pages 24-33Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ress.2017.02.006
Keywords
Competing failures; Failure isolation; Functional dependence; Markov chain; Phased-mission system; Propagated failure; Reliability analysis
Funding
- NSFC [71231001, 71671016]
- Fundamental Research Funds for the Central Universities of China [FRF-BR-15-001B]
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A phased-mission system (PMS) involves multiple, consecutive, non-overlapping phases of operation. The system structure function and component failure behavior in a PMS can change from phase to phase, posing big challenges to the system reliability analysis. Further complicating the problem is the functional dependence (FDEP) behavior where the failure of certain component(s) causes other component(s) to become unusable or inaccessible or isolated. Previous studies have shown that FDEP can cause competitions between failure propagation and failure isolation in the time domain. While such competing failure effects have been well addressed in single-phase systems, only little work has focused on PMSs with a restrictive assumption that a single FDEP group exists in one phase of the mission. Many practical systems (e.g., computer systems and networks), however may involve multiple FDEP groups during the mission. Moreover, different FDEP groups can be dependent due to sharing some common components; they may appear in a single phase or multiple phases. This paper makes new contributions by modeling and analyzing reliability of PMSs subject to multiple FDEP groups through a Markov chain-based methodology. Propagated failures with both global and selective effects are considered. Four case studies are presented to demonstrate application of the proposed method.
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