Rolling bearing fault positioning method based on pre-whitening analysis

A rolling bearing and fault location technology, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve the problems of unable to isolate and locate bearing fault types, achieve effective positioning, improve signal-to-noise ratio, reduce The effect of complex disturbances

Inactive Publication Date: 2019-04-12
BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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Problems solved by technology

[0003] In the existing bearing fault diagnosis technology, there is a lack of a bearing fault feature extraction method that can adapt to complex environmental noise conditions, resulting in the inability to isolate and locate the fault type of the bearing when the transmission system of aircraft and rail transit equipment is abnormal.

Method used

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  • Rolling bearing fault positioning method based on pre-whitening analysis
  • Rolling bearing fault positioning method based on pre-whitening analysis
  • Rolling bearing fault positioning method based on pre-whitening analysis

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Embodiment Construction

[0029] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0030] see figure 1 and figure 2 , figure 1 For this example, figure 2 A schematic diagram of the overall structure of a rolling bearing fault location method based on pre-whitening analysis provided in this embodiment. A rolling bearing fault location method based on pre-whitening analysis, comprising the following steps:

[0031] S1: Perform Fourier transform on the collected vibration signal of the rolling bearing to obtain the frequency domain signal of the vibration signal of the rolling bearing.

[0032] S2: Take the logarithm of the amplitude of the frequency domain signal, and then perform an inverse Fourier transform on the frequency domain signal after t...

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Abstract

The invention provides a rolling bearing fault positioning method based on pre-whitening analysis. After a real cepstrum of a rolling bearing vibration signal is obtained, the non-zero quefrency containing nonstationary shock caused by white noise and bearing damage is reserved, the cepstrum component, corresponding to the quefrency expect for the non-zero quefrency, in the real cepstrum is set tobe zero, complex interference of the outside world is greatly lowered in the process, the signal-to-noise ratio of the rolling bearing vibration signal is increased advantageously, the envelope spectrum with the higher precision is obtained, thus the rolling bearing fault is effectively positioned, and the problem that in the prior art, when transmission systems of an aircraft and rail transit equipment is abnormal in operation, the fault type of a bearing cannot be positioned in an isolated mode can be solved.

Description

technical field [0001] The invention belongs to the technical field of fault detection and fault extraction, in particular to a rolling bearing fault location method based on pre-whitening analysis. Background technique [0002] Typical transmission functional systems such as aircraft and rail transit equipment have important functions such as load bearing, vibration reduction, guidance and braking, and play a role in transmitting loads. When the bearing is in operation, due to poor lubrication, excessive load or rigid impact, etc., it may cause peeling, cracks, indentations and other faults on the inner ring, outer ring, and rolling elements of the bearing. [0003] In the existing bearing fault diagnosis technology, there is a lack of a bearing fault feature extraction method that can adapt to complex environmental noise conditions, resulting in the inability to isolate and locate the fault type of the bearing when the transmission system of aircraft and rail transit equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 任帅房红征樊焕贞熊毅罗凯何宵琼
Owner BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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