Fault diagnosis method of aero-engine exhaust temperature sensors

A technology for exhaust temperature and fault diagnosis, applied in instruments, electrical testing/monitoring, control/regulation systems, etc., can solve problems such as increased probability of misjudgment and high failure rate, and achieve the effect of accurate temperature data
CN110362064AActive Publication Date: 2019-10-22NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEASTERN UNIV
Publication Date
2019-10-22

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Abstract

The invention belongs to the technical field of aero-engine fault diagnosis, and particularly relates to a fault diagnosis method of aero-engine exhaust temperature sensors. The control parameters andstate parameters of an engine are acquired. The method includes the following steps: the temperature data of multiple exhaust temperature sensors is acquired; the control parameters, the state parameters and each piece of acquired temperature data are input as input information to a four-layer neural network model; the four-layer neural network model outputs the fault weight of each exhaust temperature sensor according to the input information; each fault weight is combined with the corresponding temperature data according to a weighted average deviation classification algorithm, and a resultabout whether there is a faulty exhaust temperature sensor is output; and if there is a faulty exhaust temperature sensor, the information of the faulty exhaust temperature sensor is output. The method can be used to accurately judge a faulty exhaust temperature sensor under simultaneous working of multiple exhaust temperature sensors.
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Description

technical field

[0001] The invention belongs to the technical field of aero-engine fault diagnosis, in particular to a fault diagnosis method for an aero-engine exhaust temperature sensor. Background technique

[0002] The working environment of the aero-engine exhaust temperature sensor is extremely harsh, high temperature, high pressure, and high speed make it the type of sensor with the highest failure rate among all aero-engine sensors.

[0003] Aiming at the high failure rate of aero-engine exhaust temperature sensors, the current mainstream solution is to use multiple exhaust temperature sensors, generally 4 to 6, and evenly distribute multiple exhaust temperature sensors between the high-pressure turbine and the low-pressure turbine on the same section. Among them, a faulty exhaust gas temperature sensor will output wrong data, so it is necessary to judge whether the exhaust gas temperature sensor is faulty to obtain other correct temperature data.

[0004] The faul...

Claims

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