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Performance evaluation of multi-state degraded systems with minimal repairs and imperfect preventive maintenance

机译：多状态降级系统的性能评估，维修少，预防性维护不完善

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摘要

In this paper, we develop a model for evaluating the availability, the production rate and the reliability function of multi-state degraded systems subjected to minimal repairs and imperfect preventive maintenance. The status of the system is considered to degrade with use. These degradations may lead to decrease in the system efficiency. It is assumed that the system can consecutively degrade into several discrete states, which are characterized by different performance rates, ranging from perfect functioning to complete failure. The latter is observed when the degradation level reaches a certain critical threshold such as the system efficiency may decrease to an unacceptable limit. In addition, the system can fail randomly from any operational or acceptable state and can be repaired. This repair action brings the system to its previous operational state without affecting its failure rate (i.e., minimal repair). The used preventive maintenance policy suggests that if the system reaches the last acceptable degraded state, it is brought back to one of the states with higher efficiency. Considering customer demand as constant, the system is modeled as a continuous-time Markov process to assess its instantaneous and stationary performance measures. A numerical example is given to illustrate the proposed model.
机译：在本文中，我们开发了一个模型，用于评估经过最少维修和不完善的预防性维护的多状态退化系统的可用性，生产率和可靠性功能。系统状态被认为随着使用而降低。这些降级可能导致系统效率降低。假定系统可以连续降级为几个离散状态，这些状态的特征是从完善的功能到完全的故障，其性能比率不同。当降级达到某个关键阈值（例如系统效率可能降低到不可接受的极限）时，会观察到后者。此外，系统可能会在任何运行状态或可接受状态下随机故障，并且可以修复。该修复动作使系统回到其先前的操作状态，而不会影响其故障率（即，最小限度的修复）。使用的预防性维护策略建议，如果系统达到最后一个可接受的降级状态，则会以更高的效率将其带回到其中一个状态。考虑到客户需求是恒定的，该系统被建模为连续时间的马尔可夫过程，以评估其瞬时和静态性能指标。数值例子说明了所提出的模型。

著录项

  • 来源
    《Reliability Engineering & System Safety》 |2010年第2期|65-69|共5页
  • 作者

    Isaac W. Soro; Mustapha Nourelfath; Daoud Ait-Kadi;

  • 作者单位

    Interuniversity Research Center on Enterprise Networks, Logistics and Transportation (CIRRELT), Mechanical Engineering Department, Universite Laval, Pavilion Adrien-Pouliot, Sainte-Foy, Quebec, Canada G1K 7P4;

    Interuniversity Research Center on Enterprise Networks, Logistics and Transportation (CIRRELT), Mechanical Engineering Department, Universite Laval, Pavilion Adrien-Pouliot, Sainte-Foy, Quebec, Canada G1K 7P4;

    Interuniversity Research Center on Enterprise Networks, Logistics and Transportation (CIRRELT), Mechanical Engineering Department, Universite Laval, Pavilion Adrien-Pouliot, Sainte-Foy, Quebec, Canada G1K 7P4;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    multi-state systems; degradation; preventive maintenance; minimal repair; performance measures;

    机译：多状态系统;降解;预防性的维护;维修少绩效指标;

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