Method and device for monitoring the malfunction of APU turbine vane fracture and rotor shaft jam

Abstract The present invention relates to a method and device for monitoring APU turbine vane fracture and rotor shaft jam. The method for monitoring APU turbine vane fracture and rotor shaft jam comprises: acquiring APU s messages at multiple time points within a period; obtaining the operation parameters of the APU according to the APU messages, the operation parameters including at least the start time STA; calculating the average value AVG and the deviation index 6 of the start time STA within the period; and determining the circumstance of the turbine vane fracture and rotation shaft o jam of APU is in stable phase, decline phase or malfunction phase according to the deviation index 6 Acquiring the data in the next message, and obtaining the next start time STA selecting M values of the start time STA before the points whose number is the sum of two counters and calculating its average value AVG and deviation 6 5300 Whether Yes 5310 larger than the threshold Input the value malfunction warning No Whether Yes 5410 550 larger than the serious Input the serious should v u decline warning Whether 6* sYes Input the decline larger than the decline 10 . shold v wanm No Figure 5