New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Fault Analysis of the Wind Turbine Drive Train in the Quefrency Region

큐프렌시 영역 해석을 통한 드라이브 트레인 결함 분석

  • Park, Yong-Hui (Mechanical Engineering, Pohang University of Science & Technology) ;
  • Shi, Wei ;
  • Park, Hyun-Chul (Graduate School of Engineering Mastership, Pohang University of Science & Technology)
  • 박용희 (포항공과대학교 기계공학과) ;
  • 씨웨이 (건국대학교 기계설계학과) ;
  • 박현철 (포항공과대학교 엔지니어링대학원)
  • Received : 2013.02.21
  • Accepted : 2013.08.05
  • Published : 2013.09.25
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Abstract

In the previous research, dynamic results have been analyzed in the time and frequency regions. Time and frequency region can be transformed by the Fourier transform. This transform is very useful about analyzing system behaviors. However, because of coupling, it cannot give clear results in the real system including lots of defects. In this paper, we introduced the analysis based on quefrency region to represent physical means clearly from complicated results. We simulated the drive train system which has defects, and compared between frequency and quefrency region to show its excellence. To do this process, We established mathematical model. The equation of motion was derived by the Lagrange equation and constraint equations. The constraint equation included relationships about gear mesh, flexibility of shaft. About numerical analysis, the Newmark beta method was used to get results. And FFT (Fast Fourier Transform) which converts results from time domain to frequency, qufrequency was used.

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References

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