火箭漏电故障诊断技术研究

基于集对分析理论和故障树的相关知识,研究了火箭(LV)测试及发射过程中的一类新的漏电故障诊断技术。在火箭漏电故障原因的各种可能组合方式构造火箭漏电故障树的基础上,引入中间状态概率的概念。基于集对分析联系数理论确立了漏电故障因素的重要度模型,对系统底事件和顶事件的失效概率进行分析,从而确立了火箭漏电故障诊断的新方法。该方法成功应用于火箭控制系统漏电故障诊断的工程实例表明:该方法能及时诊断火箭系统的漏电故障原因,采取合理的措施有效地排除故障,具有良好的更新能力和应用前景。

Research on the Leak Current Fault Diagnostic Technology for Launch Vehicle

A new leak current fault diagnosis method of Launch Vehicle (LV) was researched by combining connection number of set pair analysis and fault tree analysis（FTA）. Every kind of factors, which could make the leak current fault of LV, was analyzed in detail. Then a fault tree model of LV leak current was constructed according to every possible combination way of these factors, which can impact on LV leak current fault. An attribute significance model of factor influencing leak current fault was presented, and a leak current fault diagnostic technology of LV was established by introducing the intermediate probability and the theory of connection number of set pair analysis. An example of LV leak current fault diagnosis was given to verify the reliability and effectiveness of the model. The simulation results show that the model was easy to find the weakness of system, so it has better updating capability and applied prospect.