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Machine Fault Diagnosis Method based on DWT Power Spectral Density using Multi Patten Recognition

다중 패턴 인식 기법을 이용한 DWT 전력 스펙트럼 밀도 기반 기계 고장 진단 기법

  • Kang, Kyung-Won (Dept. of Information and Communications Eng., Tongmyong University) ;
  • Lee, Kyeong-Min (College of General Education, Tongmyong University) ;
  • Vununu, Caleb (Dept. of IT Convergence and Application Eng., Pukyong National University) ;
  • Kwon, Ki-Ryong (Dept. of IT Convergence and Application Eng., Pukyong National University)
  • Received : 2019.07.03
  • Accepted : 2019.10.23
  • Published : 2019.11.30

Abstract

The goal of the sound-based mechanical fault diagnosis technique is to automatically find abnormal signals in the machine using acoustic emission. Conventional methods of using mathematical models have been found to be inaccurate due to the complexity of industrial mechanical systems and the existence of nonlinear factors such as noise. Therefore, any fault diagnosis issue can be treated as a pattern recognition problem. We propose an automatic fault diagnosis method using discrete wavelet transform and power spectrum density using multi pattern recognition. First, we perform DWT-based filtering analysis for noise cancelling and effective feature extraction. Next, the power spectral density(PSD) is performed on each subband of the DWT in order to effectively extract feature vectors of sound. Finally, each PSD data is extracted with the features of the classifier using multi pattern recognition. The results show that the proposed method can not only be used effectively to detect faults as well as apply to various automatic diagnosis system based on sound.

Keywords

References

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