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针对目前飞机恒速恒频交流(CSCF-AC)电源系统故障诊断方法中存在的虚警率高、信息不能共享等问题,提出一种基于动态故障树(DFT)的CSCF-AC电源系统网络化故障诊断方法。通过在普通布尔算子中引入BEFORE算子,对CSCF-AC电源系统动态故障树进行定性分析,得到系统的失效模式,在此基础上建立一个包括机内自检、地面诊断和远程专家诊断在内具有三层结构的网络化故障诊断系统。实验结果表明,该方法有效可靠,具有一定的工程实用性。
Aiming at the problems such as the high false alarm rate and the unavailability of information in the fault diagnosis method of the aircraft constant speed constant frequency (CSCF-AC) power system, a CSCF-AC power system based on Dynamic Fault Tree (DFT) Fault diagnosis method. By introducing BEFORE operator into ordinary Boolean operators, the dynamic fault tree of CSCF-AC power system is qualitatively analyzed, and the failure mode of the system is obtained. Based on this, a new fault diagnosis model including self-test, ground diagnosis and remote expert diagnosis Within the three-tier structure of the network fault diagnosis system. Experimental results show that the method is effective and reliable, and has certain engineering practicability.