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Weak aging properties for coherent systems with statistically dependent component lifetimes
Author(s) -
Li Chen,
Li Xiaohu
Publication year - 2020
Publication title -
naval research logistics (nrl)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 68
eISSN - 1520-6750
pISSN - 0894-069X
DOI - 10.1002/nav.21928
Subject(s) - component (thermodynamics) , copula (linguistics) , reliability (semiconductor) , computer science , statistical physics , reliability engineering , lagrangian coherent structures , physics , mathematics , quantum mechanics , econometrics , engineering , power (physics) , vortex , thermodynamics
Abstract As a relevant topic in reliability theory, the preservation of aging properties under the formation of various coherent structures contributes to improving system performance through better structure design and more effective system maintenance. The classical research in this line usually focuses upon coherent systems with independent component lifetimes. Recently, some authors discussed the preservation of IFR, NBU, and DMRL in the setting of dependent component lifetimes. This paper further investigates sufficient conditions for coherent systems with dependent component lifetimes to preserve aging properties including NBUC, NBU (2), DMRL, and their dual versions. Some examples are presented to illustrate coherent structures and typical copula functions fulfilling the present sufficient conditions as well.