相依多模失效下冷贮备系统最优切换及视情维护决策
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作者单位:

1.太原科技大学工业与系统工程研究所;2.太原科技大学经济与管理学院

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中图分类号:

TH165+.3

基金项目:

国家自然基金项目 (71701140;72071183); 山西省高等学校科学研究优秀成果培育项目(2019SK028); 山西省自然科学基金项目 ( 20210302123206);山西省研究生优秀创新项目(2021Y701,2021Y680)山西省回国留学人员科研资助项目(2021-135).


Optimal Switching and Condition Based Maintenance Decision of Cold Standby System subject to dependent Multimode Failures
Author:
Affiliation:

1.Division of industrial and system engineering, Taiyuan University of Science &2.Technology, Taiyuan 030024, China;3.School of Economics &4.Management, Taiyuan University of Science &

Fund Project:

National Natural Science Foundation of China (71701140;72071183); Cultivate Scientific Research Excellence Programs of Higher Education institutions in Shanxi (2019SK028); The Shanxi Natural Science Foundation of China (20210302123206);Excellent innovation project for Postgraduates in Shanxi Province(2021Y701,2021Y680); Research support project for returned overseas students in Shanxi Province(2021-135).

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    摘要:

    为保证系统的可靠运行,诸如煤矿主通风系统、发电机冷却系统等均采用一用一备的冷贮备切换运行模式。系统的切换和维护策略直接影响着系统的运行性能和失效。且系统在运行过程中同时存在着内部退化导致的软失效和外部冲击导致的硬失效,外部冲击影响着系统退化的同时,对其切换与维护决策也有着间接的影响。本文针对存在冲击影响的冷贮备系统研究其最优切换及视情维护决策问题。首先,在系统结构和切换式运行和维护特性分析的基础上,制定了基于周期切换和状态检测的切换式离线视情维护策略;其次,建立了累积冲击过程影响下系统退化所致的软失效和极端冲击过程所致的硬失效竞争可靠性模型;接着,通过分析两类冲击过程影响下系统运行与备用设备交替使用、维修过程中的状态转移特性,重点推导了各检测周期时刻系统状态概率分布的迭代计算模型;然后,以系统平均费用率最小为目标,建立了解析决策模型,以求解系统的最优切换周期和维护阈值。最后,以矿井主通风系统为案例验证了策略及模型的正确性和有效性,并分析了模型对参数的灵敏度。结果表明系统的最优维修策略随机冲击影响的不同而变化显著。

    Abstract:

    To ensure the reliability of operation system, such as ventilation system of the coal mine and generator cooling system in the cold standby switching operation mode with one for use and one for standby is adopted. The switching and maintenance strategy directly affects the failure probability and operation performance of the system. During operation, the system will experience soft failure caused by internal degradation and hard failure caused by external shocks. While external shocks affect system degradation, it also has an indirect influence on the system switching and maintenance decision. In this paper, the optimal switching and condition based maintenance decision of cold standby switching system with random shocks is studied. Firstly, an off-line condition based maintenance strategy with periodic switching and inspection is proposed, based on the analysis of the structure and maintenance characteristics of the switched operation system; Secondly, the reliability models of competitive failure, between soft failure caused by system degradation subject to cumulative shock process and hard failure caused by extreme shock process , are established; Then, the iterative model of probability distribution of system state at each inspection point is derived by analyzing the characteristics of state transition in the process of alternate use and maintenance of operation and standby equipment subject to two kinds of shock processes; Furthermore, an analytical decision model is established to minimize the average cost rate to obtain the optimal switching period and maintenance threshold; Finally, the correctness and effectiveness of the strategy and the model are verified by taking coal mine main ventilator system as the example, and the sensitivity of the model to the parameters is analyzed.The results show that the optimal maintenance strategy of the system changes significantly with the impact of shocks.

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  • 收稿日期:2021-12-15
  • 最后修改日期:2022-04-26
  • 录用日期:2022-04-27
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