A Feature Extraction Method for Compound Faults of Planetary Gearbox

A planetary gearbox and compound fault technology, which is applied in the direction of machine gear/transmission mechanism testing, complex mathematical operations, etc., can solve problems such as the inability to effectively solve the problem of crack identification of planetary gearboxes, so as to avoid sudden accidents and reduce The effect of economic loss
CN107608936BActive Publication Date: 2020-09-15GUILIN UNIV OF ELECTRONIC TECH
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUILIN UNIV OF ELECTRONIC TECH
Publication Date
2020-09-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a planetary gearbox composite fault feature extraction method. Firstly, a planetary gearbox vibration signal is measured and stored; secondly, a multi-wavelet symmetrical lifting framework is constructed, and control parameters are introduced; thirdly, multi-fractal entropy is constructed to serve as an evaluation index of a self-adaptive matching criterion, multi-wavelet self-adaptive construction is carried out through an intelligent optimization algorithm, and a multi-wavelet basis function matched with a dynamic signal is obtained; fourthly, redundant multi-wavelettransform decomposition is performed; finally, the relative energy ratio at the frequency of a fault feature in each frequency band is calculated, a frequency band relative energy ratio columnar diagram is obtained, a fault sensitive frequency band is selected, and then a composite fault is identified and separated. The method is capable of overcoming the influence of a complex transmission path and working condition noise of a planetary gearbox, and early fault features of an inner gear ring, a planetary gear and a sun gear of the planetary gearbox are extracted and separated by means of themulti-wavelet self-adaptive construction and sensitive feature frequency band selection.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of planetary gearbox fault detection, in particular to a method for extracting a compound fault feature of a planetary gearbox. Background technique

[0002] Planetary gearboxes are small in size, light in weight, large in transmission ratio, high in efficiency, and strong in carrying capacity. They also have the advantages of multi-force convergence or single-force dispersion. They are widely used in various industries such as new energy vehicles, wind power generators, aerospace, and ships. system. Because planetary gearboxes often operate under harsh environmental conditions such as high speed, heavy load, and strong impact, key parts such as sun gears, planetary gears, and ring gears in planetary gearboxes are prone to wear, fatigue, broken teeth, and cracks. This kind of failure will further induce other failures, resulting in huge economic losses. Therefore, it is of great engineering significance to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More