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Engine fault diagnosis method based on feature fusion

A technology of fault diagnosis and feature fusion, applied in the direction of engine testing, computer components, pattern recognition in signals, etc., can solve the problems of information redundancy, engine fault identification and diagnosis simplification, etc., to reduce data noise, The effect of suppressing modal confusion and sufficient data information

Pending Publication Date: 2021-09-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0007] The technical problem solved by the present invention is: in order to solve the defects and deficiencies of the simplification and information redundancy of existing engine fault identification and diagnosis, the present invention designs an engine fault diagnosis method based on feature fusion, using feature fusion and support vectors Machine (SVM), complete engine fault diagnosis, and identify various engine faults more accurately

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  • Engine fault diagnosis method based on feature fusion
  • Engine fault diagnosis method based on feature fusion
  • Engine fault diagnosis method based on feature fusion

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Embodiment Construction

[0043] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

[0044] see Figure 1-Figure 2 , the present invention is realized through the following technical solutions:

[0045] Engine fault diagnosis research based on feature fusion, including the following steps:

[0046] Step 1: Time domain ana...

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Abstract

According to the engine fault diagnosis method based on feature fusion, engine fault diagnosis is completed by using feature fusion and a support vector machine, and various faults of an engine are identified more accurately. Firstly, modal decomposition is performed on research data, then a singular value, an approximate entropy and a sample entropy are selected as fault features, and finally, the three features are fused and input into an SVM classifier for training, testing and simulation, so that the accuracy of fault diagnosis is greatly improved.

Description

technical field [0001] The invention belongs to the technical research field of engine fault diagnosis, in particular to an engine fault diagnosis method based on feature fusion. Background technique [0002] Among the various components of all aircraft, the aeroengine is one of the core mechanical systems. [0003] Taking civil aviation airliners as an example, aeroengines are not only the source of power to support the launch and stable flight of the aircraft, but also provide energy for other systems inside the aircraft. Therefore, the reliability of the engine is the basis of the overall safety and reliability of an aircraft. If the engine fails, it will jeopardize the safety performance of the entire aircraft. Therefore, it is very necessary to monitor the running state of the aero-engine. [0004] During the continuous operation of the aero-engine, the working condition of the shaft rotor as the core component directly determines the safety performance of the aero-e...

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Application Information

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IPC IPC(8): G06K9/00G06K9/62G01M15/00
CPCG01M15/00G06F2218/04G06F2218/08G06F2218/12G06F18/2411G06F18/253
Inventor 张梦倩吴亚锋种泽中
Owner NORTHWESTERN POLYTECHNICAL UNIV