故障诊断技术(FDD)是一门交叉性的综合技术,它涉及多门学科。我国对故障诊断技术的研究起步较晚,广泛的研究则从20世纪80年代开始发展起来,并很快在我国的化工、冶金、电力、铁路等行业得到了应用。铝电解过程是一个非线性、多耦合、时变和大时滞的工业过程体系,其自身内部复杂 Fault Diagnosis Technology (FDD) is a cross-cutting integrated technology that involves many disciplines. Research on fault diagnosis in our country started relatively late. Extensive researches began to develop from the 1980s and were quickly applied in the chemical, metallurgy, electric power and railway industries in our country. Aluminum electrolysis process is a non-linear, multi-coupled, time-varying and time-lag industrial process system, its own internal complex