A method for fault detection of aeroengine gas circuit components

A technology of aero-engines and gas circuit components, which is applied in the direction of engine testing, machine/structural component testing, and measuring devices. It can solve the problems of increasing calculation burden and complex implementation, and achieve the effect of sensor fault-tolerant function
CN105372071BActive Publication Date: 2017-10-31上海航数智能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
上海航数智能科技有限公司
Publication Date
2017-10-31

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Abstract

The invention relates to an aero-engine gas circuit part fault detection method, and solves problems that the calculation burden is heavy and the fault tolerance is poor when a standard extended Kalman filtering algorithm employs a centralized-type structure for gas circuit health diagnosis. Moreover, the designed sensor fault detection and isolation method based on state consistency can achieve the fault tolerance function of the sensor. The method takes a filtering structure of a fusion structure as the basis, and a fault detection unit is additionally disposed between each local filter and a main filter. The sensor fault detection is carried out under the condition that when the sensor is normal, all local filters are consistent in state estimation. If a fault happens to a subsystem, the subsystem is isolated. When fusion is carried out in the main filter, the information of a fault subsystem is eliminated, and the method just carries out information fusion and feedback on a normal subsystem, thereby achieving the fault diagnosis of a gas circuit with a function of sensor fault tolerance.
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Description

technical field

[0001] The invention relates to a fault detection method of an aero-engine air circuit component, belonging to the technical field of aero-engine fault diagnosis. Background technique

[0002] As the heart of an aircraft, an aero-engine has a complex structure and a harsh working environment. Engine fault diagnosis technology is an important means to ensure engine performance and reliability and reduce maintenance costs. During the service of an aero-engine, the performance of components will slowly degrade. In addition, sudden changes in component health parameters may occur; at the same time, due to the harsh working environment, sensors are also one of the components that are prone to failure; gas circuit component failure and sensor failure Together affect the performance and reliability of aero-engines, it is necessary to diagnose them.

[0003] At present, the fault diagnosis of air circuit components of aeroengines is mainly to estimate the changes of...

Claims

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