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From: StGl on 16 Jan 2006 03:40
Hi,
 
has anybody already measured the spike energy (gSE) value of a vibration signal with LabView? Does anybody know about a VI which calculates this value (e.g. in the Sound and Vibration Toolset)?
 
Thanks a lot for any help.
 
Regards,
 
Stefan
From: preston johnson on 16 Jan 2006 10:40
very interesting question.  I understand that spike energy is another term for impact energy typically associated with a bearing fault.  The amount of energy in this frequency range is typicall less than the energy in the lower frequency range of the vibrating machine.  So the steps are:
1) digitize the vibration data at a high rate, with good anti-liasing filters
2) pass the vibration data through a high pass frequency filter to remove the low frequency vibration components
3) then you can perform signal processing on the "spike energy".  This can be done with zoom FFT, envelope methods, artificial shifting the signal down and invers fft, etc. 
What is it you hope to learn from your spike energy analysis?
 
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