Journals Articles Conferences News About CLP
Submit a paper Email Alert
Search
Search
Articles
Journals
News
Advanced Search
Top Searches
2D MaterialsTransformation opticsQuantum PhotonicsSmall lasersSemiconductor UV PhotonicsSupersymmetric microring laser arrays

Laser & Optoelectronics Progress, Volume. 59, Issue 21, 2107001(2022)

Feature Extraction of Bearing Faults Under Nonlinear Equalization of Variance Based on Wavelet Packet Decomposition

Zhiqing Zheng1, Haiyan Quan1, and Junbing Qian2、*
Author Affiliations
  • 1Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, Yunnan, China
  • 2Faculty of Civil Aviation and Aeronautics, Kunming University of Science and Technology, Kunming 650500, Yunnan, China
    • show less
    AbstractGet PDF(in Chinese)
    Figures&Tables (13)
    Equations (7)
    References (19)
    Tools
    Paper Information
    Topics
    Figures & Tables(13)
    Structure diagram of wavelet packet decomposition tree

    Fig. 1. Structure diagram of wavelet packet decomposition tree

    Download full size
    Comparison chart of variance before and after processing of nonlinear equalization function. (a) Analysis of variance; (b) equalization analysis of variance

    Fig. 2. Comparison chart of variance before and after processing of nonlinear equalization function. (a) Analysis of variance; (b) equalization analysis of variance

    Download full size
    Experimental setup

    Fig. 3. Experimental setup

    Download full size
    Comparison chart of two kinds of variance analysis before and after nonlinear equalization function processing. (a) Analysis of variance; (b) equalization analysis of variance

    Fig. 4. Comparison chart of two kinds of variance analysis before and after nonlinear equalization function processing. (a) Analysis of variance; (b) equalization analysis of variance

    Download full size
    Comparison chart of two kinds of variance analysis under two-layer decomposition of wavelet packet. (a) Analysis of variance; (b) equalization analysis of variance

    Fig. 5. Comparison chart of two kinds of variance analysis under two-layer decomposition of wavelet packet. (a) Analysis of variance; (b) equalization analysis of variance

    Download full size
    Comparison of two kinds of variance analysis under four-layer decomposition of wavelet packet. (a) Analysis of variance; (b) equalization analysis of variance

    Fig. 6. Comparison of two kinds of variance analysis under four-layer decomposition of wavelet packet. (a) Analysis of variance; (b) equalization analysis of variance

    Download full size
    Comparison chart of two kinds of variance analysis under two-layer decomposition of wavelet packet. (a) Analysis of variance; (b) equalization analysis of variance

    Fig. 7. Comparison chart of two kinds of variance analysis under two-layer decomposition of wavelet packet. (a) Analysis of variance; (b) equalization analysis of variance

    Download full size

    • Table 1. Range of equalization variance of different bearing state signals in the 6th frequency band and the 7th frequency band

      View table

      Table 1. Range of equalization variance of different bearing state signals in the 6th frequency band and the 7th frequency band

      Different bearings status signalFrequency band 6-range of equalization variance intervalFrequency band 7-range of equalization variance interval
      Normal［20.6996，21.2204］［21.3962，22.9554］
      Rolling element fault［14.8024，16.4372］［19.2174，20.5239］
      Inner ring fault［9.2565，11.0785］［13.4376，15.3694］
      Outer ring fault［6.3673，8.9738］［10.2205，13.2643］

    • Table 2. Degree of discrimination between adjacent bearing state signals in the 6th band and the 7th band

      View table

      Table 2. Degree of discrimination between adjacent bearing state signals in the 6th band and the 7th band

      Adjacent bearing state signalFrequency band 6-discrimination degreeFrequency band 7-discrimination degree
      Normal and rolling element fault4.26240.8723
      Rolling element fault and inner ring fault3.72393.8480
      Inner ring fault and outer ring fault0.28270.1733

    • Table 3. Discrimination of state signals of adjacent bearings in each frequency band in two-layer decomposition of wavelet packet

      View table

      Table 3. Discrimination of state signals of adjacent bearings in each frequency band in two-layer decomposition of wavelet packet

      Adjacent bearing state signalFrequency band 2-discrimination degreeFrequency band 3-discrimination degreeFrequency band 4-discrimination degree
      Normal and rolling element fault3.535610.15271.1720
      Rolling element fault and inner ring fault1.89781.36673.7189
      Inner ring fault and outer ring fault1.44972.75480.9462

    • Table 4. Interval range of equalization variance of each frequency band under two-layer decomposition of wavelet packet for different bearing state signals

      View table

      Table 4. Interval range of equalization variance of each frequency band under two-layer decomposition of wavelet packet for different bearing state signals

      Different bearings state signalFrequency band 2- range of equalization variance intervalFrequency band 3- range of equalization variance intervalFrequency band 4- range of equalization variance interval
      Normal［14.3027，14.9307］［20.0167，20.5811］［21.2329，22.7619］
      Rolling element fault［9.0918，10.7670］［8.4411，9.8640］［18.6545，20.0609］
      Inner ring fault［6.3368，7.1940］［6.2091，7.0744］［12.9182，14.9355］
      Outer ring fault［2.7478，4.8871］［1.9281，3.4543］［9.6592，11.9720］

    • Table 5. Discrimination of state signals of adjacent bearings in each frequency band in two-layer decomposition of wavelet packet

      View table

      Table 5. Discrimination of state signals of adjacent bearings in each frequency band in two-layer decomposition of wavelet packet

      Adjacent bearing state signalFrequency band 2- discrimination degreeFrequency band 3- discrimination degreeFrequency band 4- discrimination degree
      Normal and rolling element fault3.22758.36571.7593
      Rolling element fault and inner ring fault1.62981.34043.9653
      Inner ring fault and outer ring fault1.05011.49571.5793

    • Table 6. Interval range of equalization variance of each frequency band under two-layer decomposition of wavelet packet for different bearing state signals

      View table

      Table 6. Interval range of equalization variance of each frequency band under two-layer decomposition of wavelet packet for different bearing state signals

      Different bearings status signalFrequency band 2- range of equalization variance intervalFrequency band 3- range of equalization variance intervalFrequency band 4- range of equalization variance interval
      Normal［13.6721，14.0954］［17.8688，18.1822］［21.6752，22.6967］
      Rolling element fault［8.9166，10.4446］［8.0322，9.5031］［18.4066，19.9159］
      Inner ring fault［6.2092，7.2868］［5.3431，6.6918］［13.2947，14.4413］
      Outer ring fault［3.1314，5.1591］［2.6567，3.8475］［9.7820，11.7154］
    Tools

    Get Citation

    Copy Citation Text

    Zhiqing Zheng, Haiyan Quan, Junbing Qian. Feature Extraction of Bearing Faults Under Nonlinear Equalization of Variance Based on Wavelet Packet Decomposition[J]. Laser & Optoelectronics Progress, 2022, 59(21): 2107001

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Set citation alerts for article
    Save article for my favorites
    Paper Information

    Category: Fourier Optics and Signal Processing

    Received: Aug. 30, 2021

    Accepted: Oct. 25, 2021

    Published Online: Oct. 24, 2022

    The Author Email: Junbing Qian (1226160701@qq.com)

    DOI:10.3788/LOP202259.2107001

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology