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Entry  Mon Sep 20 19:48:13 2010, tara, DailyProgress, PMC, PMC servo TF is fitted by LISO fit.pngtffit.fil
    Reply  Tue Sep 21 10:43:35 2010, Koji, DailyProgress, PMC, PMC servo TF is fitted by LISO 
Message ID: 367     Entry time: Mon Sep 20 19:48:13 2010     Reply to this: 369
Author: tara 
Type: DailyProgress 
Category: PMC 
Subject: PMC servo TF is fitted by LISO 

I fitted the TF of PMC servo card simulated from LISO, and found poles at 2.01 Hz, 59.7 Hz, 13.4 MHz, and zero at 479.4 Hz.

 From last week, I used LISO to model the TF but it did not provide the values of poles and zeroes.

Thanks Koji who taught me how to use LISO fitting feature. Now I can find poles and zeroes of the simulation.

 

The frequency range spans from 1 Hz -  1 MHz, covering out region of interest (~1 Hz up to a few hundred kHz).

  For higher frequency, I couldn't make it work yet.

pole 2.0139158941  ### fitted (name = pole0)
zero 479.4339553158  ### fitted (name = zero0)
pole 59.7091341574k  ### fitted (name = pole1)

factor 9.5703858437

pole 13.4116105660M 99.7575256877m  

 

The plot shows simulated data and fit data, we have a nice fit that we can hardly see red and green plots.

 The code for simulating TF is pmc.fil, which can be found on previous entry, the code for fitting, tffit.fil, is attached below.

 

Attachment 1: fit.png  19 kB  Uploaded Mon Sep 20 21:10:51 2010  | Hide | Hide all
fit.png
Attachment 2: tffit.fil  609 Bytes  Uploaded Mon Sep 20 21:11:14 2010  | Hide | Hide all
pole 2.0139158941  ### fitted (name = pole0)
zero 479.4339553158  ### fitted (name = zero0)
pole 59.7091341574k  ### fitted (name = pole1)

pole 13.4116105660M 99.7575256877m  ### fitted (name = pole2)
#zero 10M 100
#pole 3M 5
#pole 3M

factor 9.5703858437  ### fitted
... 24 more lines ...
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