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Waterfall Analysis: Frequency Spectrum or Order Spectrum?

  • Post author:John Mathey
  • Post published:July 25, 2012
  • Reading time:6 mins read
  • Post comments:2 Comments
  • Post category:signal processing

This article addresses two basic approaches to analyzing rotating machinery during transient (sweeping rpm) conditions.  The first is the traditional method which uses Frequency (FFT) Spectrum analysis at target rpm…

Continue ReadingWaterfall Analysis: Frequency Spectrum or Order Spectrum?
Read more about the article Waterfall Analysis: Frequency Resolution and Smearing

Waterfall Analysis: Frequency Resolution and Smearing

  • Post author:John Mathey
  • Post published:April 18, 2012
  • Reading time:7 mins read
  • Post comments:2 Comments
  • Post category:signal processing

When measuring noise and vibration in rotating machines, especially complex devices like automobile engines, it is very important to fully understand what is being measured and what analyses need to…

Continue ReadingWaterfall Analysis: Frequency Resolution and Smearing
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