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WANG Feng-li, YU Hong-liang, DUAN Shu-lin, MA Xiao-jiang. Detection method of weak fault signal based on local wave and chaos[J]. Journal of Traffic and Transportation Engineering, 2008, 8(1): 73-77.
Citation: WANG Feng-li, YU Hong-liang, DUAN Shu-lin, MA Xiao-jiang. Detection method of weak fault signal based on local wave and chaos[J]. Journal of Traffic and Transportation Engineering, 2008, 8(1): 73-77.
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Detection method of weak fault signal based on local wave and chaos

  • 1.

    School of Marine Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China

  • 2.

    School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

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  • Author Bio:

    Wang Feng-li(1970-), male, PhD, associate professor, +86-411-83073140, wangfl@newmail.dlmu.edu.cn

  • Received Date: 2007-05-17
  • Publish Date: 2008-02-25
    Abstract
  • In order to accurately diagnose early fault of rotor system with weak signal, a new signal detection method based on local wave method associated with chaos oscillator was presented. Weak fault signal was divided into finite local wave components with different simple-intrinsic modes, so that signal was separated from noise. The components were inputted into chaos oscillator, and were transformed from chaotic states to large-scale periodic states, so that weak signal can be identified under low signal-noise ratio through distinguishing the characteristic frequency of signal. Fault diagnosis result shows that the method is feasible, can accurately diagnose early eccentricity fault of rotor system.

     

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    • References(10)
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