Abstract

For a multicomponent system, a maintenance strategy based on system structure updating and group importance measure is proposed. First, a system structure is determined by redefining its component grades, furthermore, the system structure updating is realized by introducing its survival signature. And based on the current system structure, a corrective maintenance that combines sequentially minimal repair with corrective replacement is formulated. Second, a two-level preventive maintenance (PM) is formulated based on a new group importance measure which is designed by considering two indicators, one is the system reliability calculated through its survival signature, the other is PM costs. The two indicators are calculated after its several components are updated preventively. Then, a cost-rate model is developed to find the optimal maintenance strategy. Finally, 6-component system and 10-component system are given to demonstrate the performance of the proposed strategy, and the result shows the strategy leads to significant profits when compared with existing strategies.

摘要

针对多组件系统，提出了一种基于系统结构更新和组重要性度量的维护策略。首先，通过重新定义组件等级来确定系统结构，进而通过引入其生存签名来实现系统结构更新。并在现有体系结构的基础上，制定了顺序最小修复与纠正性更换相结合的纠正性维护。其次，基于考虑两个指标设计的新的组重要性度量，制定了两级预防性维护（PM），一个是通过其生存特征计算的系统可靠性，另一个是PM成本。这两个指标是在其几个组成部分进行预防性更新后计算的。然后，开发成本率模型以找到最佳维护策略。最后，给出了6分量系统和10分量系统来证明所提策略的性能，结果表明，与现有策略相比，该策略带来了显着的收益。