Gas path fault diagnosis system of aero-engine based on Grey Relationship Degree

摘要

In consideration of the problem in traditional aero-engine fault diagnosis, a new algorithm was proposed, which does not rely on engine math model nor numerous data samples. This method based on grey relationship degree theory, engine gas path fault symptoms shifts were needed first, and then the relationship degree was calculated between ambiguous faults and specific faults to achieve the fault diagnosis. Finally, the CFM56-3 fault example validates the effectiveness and feasibility of this method.