4.6 Article

The Feature Extraction through Wavelet Coefficients of Metal Friction Noise for Adhesive and Abrasive Wear Monitoring

期刊

APPLIED SCIENCES-BASEL
卷 11, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/app11093755

关键词

friction; acoustic noise; adhesive wear; abrasive wear; wavelet coefficient

资金

  1. Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government (MOTIE) [20206300000070]
  2. Korea Institute of Energy Technology Evaluation & Planning (KETEP) [20206300000070] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The study focused on monitoring friction between two metal surfaces using acoustic signatures extracted from measured noise, showing differences in adhesive and abrasive wear states.
Featured Application Monitoring of Contact in Machining System for Possible Wears during Operation Movements. Friction between metals is a physical phenomenon that occurs in manufacturing machine tools. This annoying noise implies unnecessary metal contact and deterioration of a mechanical system. In this study, for the monitoring of the friction between two metal surfaces, the acoustic signature was extracted by applying the wavelet transform method to the noise measured from the change in contact force for each state of adhesive and abrasive wear. Experiments were conducted with a constant relative speed between the contacting metal surfaces. For the adhesive wear, the peak signal-to-noise ratio (PSNR) calculated by the wavelet transformation increases with the increasing contact pressure. Opposite trends were observed for the abrasive wear. The proposed index formed a group within a specific range. This ratio exhibited a strong relationship with the wear characteristics and the surface condition. From the proposed index calculated by the wavelet coefficients, the continuous monitoring of the wear influence on the failure of the machine movement operations is achieved by the sound radiation from the contacting surfaces.

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