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Volume 19 Issue 6
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2011  >  19(6): 455-458
SUN Tao, GAO Ai-jun, WANG Yi, DU Zhi-guo. A Fast CPB Processing Method of Off-design Vibration and Noise Data from Multiple Channels[J]. Journal of Unmanned Undersea Systems, 2011, 19(6): 455-458. doi: 10.11993/j.issn.1673-1948.2011.06.011
Citation: SUN Tao, GAO Ai-jun, WANG Yi, DU Zhi-guo. A Fast CPB Processing Method of Off-design Vibration and Noise Data from Multiple Channels[J]. Journal of Unmanned Undersea Systems, 2011, 19(6): 455-458. doi: 10.11993/j.issn.1673-1948.2011.06.011
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A Fast CPB Processing Method of Off-design Vibration and Noise Data from Multiple Channels

doi: 10.11993/j.issn.1673-1948.2011.06.011

  • The 705 Research Institute, China Shipbuilding Industry Corporation, Xi′an 710075, China

  • Received Date: 2011-01-24
  • Rev Recd Date: 2011-05-12
  • Publish Date: 2011-12-30
    Abstract
  • To solve the time-consuming and laborious problem in processing the off-design vibration and noise data from multiple channels through the traditional constant proportional bandwidth (CPB) method, an improved CPB method is proposed. Firstly, the data from all channels are divided into multi-segment, and each segment is calculated via octave algorithm based on fast Fourier transform (FFT) algorithm. Secondly, technical parameter mean and average octave sequence are calculated according to the starting and ending time corresponding to the stable condition determined by the condition parameter curve. Finally, technical parameter mean and average octave sequence of the same working condition are adjusted to the adjacent columns by indexing the condition-determining parameters. Engineering application shows that the analysis efficiency and depth of test data are improved significantly.

     

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