基于NHCTMM的多态系统不完全预防性维修决策研究

摘要

为提高LRU系统的任务完成能力,降低维修资源消耗,提出了基于NHCTMM的系统不完全预防性维修决策方法.采用NHCTMM描述部件的状态退化过程,利用通用生成函数方法对系统的可靠性进行分析,在不完全维修模型的基础上,提出了基于不完全维修的预防性维修决策方法,确保系统在有限的服役期内获得最大效费比,并以某雷达功率放大LRU系统为例进行分析,结果说明该方法具有很强的通用性和工程应用价值.%In order to improve the mission completion capability of Line Replaceable Unit (LRU) system,and reduce the maintenance resource consumption,a maintenance decision method for multi-state system based on Non-Homogeneous Continuous Time Markov Model(NHCTMM) was provided.NHCTMM was used to describe the degradation process of components,and the universal generating function was used to analyze the reliability of the system.Based upon the imperfect maintenance decision model,an imperfect preventive maintenance decision method was proposed,which ensured that the system could obtain maximum benefitcost ratio in the limited service period.Verification was conducted to a radar power amplifier LRU system,and the result showed that this method has a strong versatility and engineering application value.