民用飞机的故障诊断和故障的风险评估对于民用飞机来说是非常重要的,现阶段各种基于人工智能方法在故障的诊断上都还存在一定的局限性,所以说采取单一的诊断方法是很难满足复杂飞机系统的故障诊断任务的,我们通过不同种类的故障诊断方法进行对比研究,并在此基础上提出了民用飞机故障风险评估的TMSDG(符号有向图)方法。 Civil aircraft fault diagnosis and failure risk assessment for civil aircraft is very important, at this stage a variety of artificial intelligence-based methods in fault diagnosis there are still some limitations, so to take a single diagnostic method is very Difficult to meet the complex aircraft system fault diagnosis tasks, we conducted a comparative study of different types of fault diagnosis methods, and on this basis proposed a civil aircraft fault risk assessment TMSDG (digraph) method.