考虑多因素的可修系统任务可靠性分配方法

在实际工程中，系统常常是由串联、并联、旁联和表决等模型混合而成的复杂可修系统，目前此类系统的可靠性分配方法多采用等分分配等方法，得到的分配结果往往误差较大。本文提出了一种考虑维修、故障逻辑等多因素影响的可修系统任务可靠性分配方法。该方法以系统故障率为待分配指标，首先对包含维修影响的故障率进行转换，然后利用考虑故障逻辑的评分分配法进行分配，最后通过备件系数进行修正，获得分配结果。新方法能够为在实际工程中可修系统的任务可靠性分配提供一种简便易行的方法。 

Mission reliability allocation method considering multiple factors for repairable systems

In practical engineering, a system is usually complex and repairable. Its reliability model is not a series model but a mixed model of series, parallel, bypass and voting. The equal-distribution method is used mostly to allocate mission reliability for complex system at present. The allocation result using this method is always not accurate. Therefore, a mission reliability allocation method for repairable system considering the effects of maintenance, fault logic and other factors was proposed in this paper. First, the failure rate was calculated to remove the effect of maintenance. Then the scoring allocation method considering failure logic was adopted to allocate mission reliability. After that, the spare part coefficient was used to correct the allocation result. Finally, a case was analyzed to validate the method, which could provide an easy and effective way to allocate mission reliability for repairable systems in practical engineering.