Reliability modeling and optimization of operational use of one-shot units. (August 2018)

• Record Type: Journal Article
• Authors: Cheng, Yao; Elsayed, Elsayed A.
• Is Part Of: Reliability engineering & system safety. Volume 176(2018)
• Page Start: 27
• Page End: 36
• Publication Date: 2018-08
• Subjects: One-shot units -- System reliability -- Reliability optimization -- Nonhomogeneous -- Optimum operational use; Reliability (Engineering) -- Periodicals; System safety -- Periodicals; Industrial safety -- Periodicals; Fiabilité -- Périodiques; Sécurité des systèmes -- Périodiques; Sécurité du travail -- Périodiques; 620.00452
• DOI: 10.1016/j.ress.2018.03.021
• Languages: English
• ISSNs: 0951-8320

Abstract

Highlights: The reliability metrics of the nonhomogeneous one-shot units are derived validated. The operational use of the one-shot units is optimized under different scenarios. Bounds of the optimal operational reliability are derived and verified. A simulation model validated the derived reliability metrics of one-shot units. Abstract: One-shot units are produced in batches and stored until use. While in storage, they are subjected to random non-destructive tests (NDTs) throughout their life horizon to determine their reliability metrics. Some of the one-shot units (with nonhomogeneous characteristics) are retrieved from storage and launched for operational use when needed. Referring to the launched units as a system, we optimize the system's operational use by determining the selected units' characteristics and their launching order. The system reliability metrics are considered in the optimum selection and launching procedure. Considering the units' inhomogeneity, we provide the confidence bounds of the probability that the system achieves a successful operation based on the optimal selection and launching order. A simulation model is developed to validate the proposed plan to optimize the units' operational use.