空间推进系统故障诊断方法研究

RESEARCH ON FAULT DIAGNOSIS METHOD FOR SPACECRAFTS PROPULSION SYSTEM

关键词:  航天器推进  故障诊断专家系统  故障树图形分析  故障预测

Key words:  Spacecrat propulsion  Fault diagnosis expert system  Fault tree analysis  Failureforecasting

摘要:

论述了建构空间推进系统故障诊断专家系统的几个关键问题的解决方法。其一是利用故障树和征兆树来组织诊断判推，用于故障定位和故障预报。其二是诊断判推的区域性和时间性问题。区域性是指按气路、液路、推力室来划分判据；而时间性指诊断判据何时有效，判据的时间性表示方法以阀门动作指令为主，飞行程序为辅。

Abstract:

This paper focuses on some key prpblems of fault diagnosis experts system usetl inspacecrafts propulsion system. Fault tree is used for fault identification, forecasting tree is used forfaults forecast,and diagnosis rules are classified according to gas system propellant feed system andthruster that is the district feature of rules; The effictive Period of rules is mainly determined byexective instructions of valves,and by flight program subsidiarily.