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A Fusion Diagnosis Method for Aeroengine Gas Path Faults

An aero-engine and diagnostic method technology, which is applied in the testing of engines, testing of machine/structural components, special data processing applications, etc., can solve the problems of sensor measurement value drift, difficult to reflect the real state of the engine, and difficult to obtain the performance parameters of engine components. Accurate estimation and other problems, to achieve the effect of small amount of calculation, simultaneous diagnosis and simple structure

Inactive Publication Date: 2017-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Factors such as high temperature and high pressure accompanied by strong vibration often cause the sensor measurement value to drift, which makes it difficult for the sensor measurement results to reflect the real state of the engine, and it is therefore difficult for the Kalman filter to obtain accurate estimates of the performance parameters of the engine components

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  • A Fusion Diagnosis Method for Aeroengine Gas Path Faults
  • A Fusion Diagnosis Method for Aeroengine Gas Path Faults
  • A Fusion Diagnosis Method for Aeroengine Gas Path Faults

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0051] The specific implementation mode of the present invention takes the health diagnosis of the air circuit components of a certain type of engine as an example, such as figure 1 For the diagnosis structure diagram of the present invention, a group of health parameters representing the health status of engine components are introduced to simulate performance degradation and sudden changes in performance of engine components. The difference is combined with the Kalman filter algorithm to estimate the change of component health parameters, and the health diagnosis of engine gas path components is transformed into a parameter estimation problem of component health parameter changes.

[0052] The identification diagram of the gas path working section of a certain type of engine used in the present invention is as follows figure 2 As shown, the mai...

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Abstract

The invention discloses an aircraft engine gas path fault fusion diagnosis method. The aircraft engine gas path fault fusion diagnosis method includes the steps that an engine state variable model is built firstly, sensor bias values (NL, NH, P3 and T6) obtained when an engine with a gas path fault is in a quasi-stable state in a flight envelope, then an optimal particle is obtained through a Kalman filter according to an electromagnetism-like mechanism method, and the sensor bias values (NL, NH, P3 and T6) of the engine with the gas path fault and gas path component health parameters are obtained finally. The aircraft engine gas path fault fusion diagnosis method breaks through limitation that a traditional gas path fault diagnosis method can only achieve single fault mode diagnosis, and can achieve health diagnosis of three broad categories of fault modes including the engine sensor fault, the gas path component fault and the sensor and gas path component simultaneous fault.

Description

technical field [0001] The invention relates to the field of aero-engine fault diagnosis, in particular to a fusion diagnosis method for an aero-engine sensor fault and an air path fault. Background technique [0002] Aeroengines work in the harsh environment of high temperature, high speed, strong vibration, and high stress. The working state of the engine changes frequently, and it bears variable loads, which requires extremely high safety and reliability. Due to the limitations of engine manufacturing, technology level and materials, as well as the level of later use, maintenance and management, the cost of design, manufacture and use and repair is high, so the health management and condition-based maintenance of the engine play a vital role in the safety, reliability and economic performance of the engine. important role. Engine health management refers to the monitoring of the working status of the engine, corresponding fault diagnosis and isolation, and maintenance an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01M15/00
Inventor 鲁峰王亚凡黄金泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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