Blind source separation method of hybrid fault signal of gear case

A technology of fault signal and blind source separation, applied in the direction of machine gear/transmission mechanism testing, measuring devices, instruments, etc., can solve the problem of insufficient utilization of data information, etc., and achieve the effect of improving pertinence and effect

Inactive Publication Date: 2017-10-17
SHIJIAZHUANG TIEDAO UNIV +1
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Problems solved by technology

However, the independent component analysis only uses the statistical independence of the data, and the actual engineering data has other attributes, which will result in insufficient utilization of data information

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  • Blind source separation method of hybrid fault signal of gear case
  • Blind source separation method of hybrid fault signal of gear case
  • Blind source separation method of hybrid fault signal of gear case

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0049] like figure 1 A...

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Abstract

The invention, which relates to the technical field of the blind source separation diagnosis method for hybrid faults of the gear case, discloses a blind source separation method of a hybrid fault signal of a gear case. The method comprises: carrying out EMD preprocessing on a collected single-channel gear-case hybrid fault signal; on the basis of a method of combination of a white noise statistical feature and a kurtosis value, selecting an IMF component as an effective vibration mode component; carrying out reconstruction and grouping on the selected IMF component to form a blind source separation input signal, carrying out hybrid signal blind source separation by combining a CICA algorithm, and extracting an interested fault signal; and carrying out a Hilbert envelope analysis on the interested fault signal obtained by the CICA method to obtain an envelope spectrum, diagnosing the feature of the interested fault among the hybrid fault to realize blind source separation. With the method provided by the invention, blind source separation single-channel extension is realized and the interested fault signal is extracted.

Description

technical field [0001] The invention relates to the technical field of a blind source separation diagnosis method for a hybrid fault of a gearbox, in particular to a blind source separation method for a hybrid fault of a gearbox that can realize blind source separation single-channel expansion and extract interested fault signals. Background technique [0002] The structure of mechanical equipment is complex and consists of many parts. In order to obtain the complete operating state of the equipment, sensors are often arranged at multiple measuring points to collect signals, but the vibration signal picked up by each sensor is not the real vibration of the measured component at that position. It includes the comprehensive vibration of each component, and the transmission path of the vibration source generated by each component to the sensor is also different, which increases the complexity of the signal measured by the sensor. Obviously, there are two unknown factors in the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02
CPCG01M13/028
Inventor 郝如江安雪君史云林李代勇沈英明李辉
Owner SHIJIAZHUANG TIEDAO UNIV
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