Optimal preventive switching of components in degrading systems
- 주제(키워드) Standby systems , Optimal switching , Poisson process , Gamma process , Mission success probability
- 주제(기타) Engineering, Industrial
- 주제(기타) Operations Research & Management Science
- 설명문(일반) [Finkelstein, Maxim] Univ Free State, Dept Math Stat, Bloemfontein, South Africa; [Finkelstein, Maxim] Univ Strathclyde, Dept Management Sci, Glasgow, Lanark, Scotland; [Cha, Ji Hwan] Ewha Womans Univ, Dept Stat, Seoul 120750, South Korea; [Langston, Amy] Rhodes Univ, Dept Stat, Grahamstown, South Africa
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER SCI LTD
- 발행년도 2022
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000191080
- 본문언어 영어
- Published As https://doi.org/10.1016/j.ress.2021.108266
초록/요약
In practice, at many instances, it is important to maintain the failure-free performance of components in a standby system, as each sudden failure of an operating component can result in a failure of a system, e.g., due to imperfect or/and Mon-instantaneous' switching on failure and related adverse effects. Therefore, the scheduled preventive switching/replacement to the standby component that can be executed without these consequences is one of the effective methods for increasing reliability characteristics of such systems, especially in the safety-critical applications. In this paper, the corresponding optimal strategy for switching is described and justified for the cold standby system of two aging components with degradation modeled by the counting Poisson and gamma processes. An inspection is carried out at some optimally predetermined time and based on the observed degradation switching is performed after the optimally obtained delay. Detailed numerical examples illustrate our findings.
more