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An aero-engine and a vibration signal blind separation method and device thereof

An aero-engine and vibration signal technology, which is used in measurement devices, pattern recognition in signals, computer components, etc., can solve problems such as relying on prior information, uneven interference ability, and inability to determine the number of signal sources. To achieve the effect of suppressing noise interference and effective separation

Inactive Publication Date: 2019-04-26
AECC COMML AIRCRAFT ENGINE CO LTD
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Problems solved by technology

This type of algorithm is usually applied to positive definite occasions, relying too much on prior information, and the ability to just interfere is uneven, it is difficult to remove the correlation of signals, and it is impossible to judge the number of signal sources and other defects

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  • An aero-engine and a vibration signal blind separation method and device thereof
  • An aero-engine and a vibration signal blind separation method and device thereof
  • An aero-engine and a vibration signal blind separation method and device thereof

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0054] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0055] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses an aero-engine and a vibration signal blind separation method and device thereof. The method comprises the following steps: estimating the number of sources of a system by adopting wavelet transform, and estimating a fundamental frequency corresponding to each source; Obtaining a source signal in each observation channel; And determining the optimal estimation value of eachsource signal according to the energy relationship. According to the method, the number of sources of the system is estimated through wavelet transform, the source signal in each observation channelis obtained, noise interference in the observation signals can be effectively restrained, and effective separation of coupled vibration source signals can be achieved.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a blind separation method and device for an aero-engine and its vibration signals. Background technique [0002] With the development of rotating machinery towards high speed and high load, real-time condition monitoring of rotating machinery has become particularly important, and vibration signal analysis is a very effective method for state monitoring of rotating machinery. However, due to the complexity of the rotating machinery structure and the limitation of working conditions, the sensors for condition monitoring generally cannot be placed directly near the main vibration source, but can only be placed in suitable places such as the outer casing of the machine and a position close to the vibration source. For example, when monitoring the condition of an aeroengine, the sensor is generally arranged on the casing of the engine, which leads to the vibration signal measured by the s...

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Application Information

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IPC IPC(8): G06K9/00G01H17/00
CPCG01H17/00G06F2218/22G06F2218/08
Inventor 王凤森张永强牛超阳顾晓华
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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