基于不完备检测的并联系统维修决策研究

为了提高系统的可靠度,并联技术在重要系统上被广泛地采用.针对并联系统中的两冗余部件在物理性能、工作环境等方面的相似性以及检测时存在不完备的特点,提出了不完备交叉检测策略.为此研究了并联系统在此策略下的不同更新情况和相应的更新概率,以检测间隔和检测次数为优化变量、可靠度为约束、期望维修费用率为目标函数,建立了并联系统的优化维修模型.最后,通过实例验证了模型的有效性和经济性.

Research on maintenance optimal method of parallel system based on imperfect inspection

The parallel system is widely used in the civil aircraft in order to enhance the reliability.The redundancy units have the same physical characteristic and circumstance,and the failures are found inconveniently,so the imperfect crossed inspection is proposed firstly.Then the failure dependency and modes between these two units are analyzed,and the renewal probability of the parallel system is studied.Furthermore,the inspection interval and number are chosen as optimized variables,and an optimal maintenance model is developed to minimize the maintenance cost rate,and the model is subject to the reliability.Finally,an example is illustrated for case study,and the result proves the economicness and effectiveness of the model.