PSN-L Email List Message

Subject: RE: specific power spectral density
From: "Randall Pratt" rpratt@.............
Date: Wed, 18 Jul 2012 17:28:54 -0500


Brett, Randall,

 

Good discussion.  Challenging my long forgotten math abilities. 

 

Randall - Normalizing with division by N worked for my test program and gave
equal bin values as I had looked for.  Thank you.  Also, I frequently see
the "acceleration" term in the PSD graph labels that appear to be computed
from velocity records.  From your discussion then we should also take the
derivative of velocity data after all instrument and calibration adjustments
have been applied before computing PSD if the desire is to compute a true
power value.  Is that correct? 

 

Randy

 












Brett, Randall,

 

Good discussion.  Challenging my long forgotten = math abilities.

 

Randall - Normalizing with division by N worked for = my test program and gave equal bin values as I had looked for.  Thank = you.  Also, I frequently see the “acceleration” term in the PSD = graph labels that appear to be computed from velocity records.  From your discussion then we should also take the derivative of velocity data = after all instrument and calibration adjustments have been applied before = computing PSD if the desire is to compute a true power value.  Is that correct? =

 

Randy

 


[ Top ] [ Back ] [ Home Page ]