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| Abstract: |
| The proposed maintenance strategy uses component grades and survival signature to describe and update system structure. A system dynamic stress-strength reliability (SSR) model was established to describe component failure processes because of internal degradation and external shock. Besides, a corrective maintenance rule and two-level preventive maintenance rule made up the proposed maintenance strategy. The former combined sequentially minimal repair and corrective replacement (SMRCR) based on system structure updating. The latter considered group importance measure based on the system dynamic SSR and preventive maintenance cost. Further, a cost model was developed by the proposed strategy, and the optimal decision variables were found by genetic algorithm. Finally, using a case system to illustrate the above strategy improved system and reduced maintenance costs. |
| Key words: survival signature system structure updating system dynamic stress-strength reliability group importance measure |
| DOI：10.11916/j.issn.1005-9113.2021152 |
| Clc Number:O213.2 |
| Fund: |
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| Descriptions in Chinese: |
| 一种退化冲击系统的维修策略 陈一洁,田检 （广州软件学院 基础部，广州510900） 摘要：所提出的维修策略利用部件退化和生存signature来描述和更新系统结构。由于内部退化和外部冲击，本文建立了一个系统动态应力-强度可靠度模型(SSR)。此外，所提出的维修策略包含了故障维修规则和两层面预防维修规则。基于系统结构更新，前者由顺序性小修和故障替换组成。后者基于系统动态SSR和预防维修成本考虑了组重要度。进而，通过所提出的策略提出一个成本模型并使用基因算法优化决策变量。最终，通过实例系统说明所提策略能改善系统并减少维修成本。 关键词：生存signature,系统结构更新,系统动态应力-强度可靠度,组重要度 |
