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Entry  Fri Sep 23 17:57:34 2011, Paul, Update, SUS, Oplev filter optimization for 2 poles and 2 zeros optimised2p2z_v1.pngoptimised2p2z_v1_TFs.png
    Reply  Sat Sep 24 01:51:02 2011, rana, Update, SUS, Oplev filter optimization for 2 poles and 2 zeros 
       Reply  Tue Sep 27 08:51:29 2011, Paul, Update, SUS, Oplev filter optimization for 2 poles and 2 zeros 
    Reply  Sat Sep 24 02:09:43 2011, kiwamu, Update, SUS, Re:Oplev filter optimization for 2 poles and 2 zeros 
       Reply  Sat Sep 24 17:45:56 2011, Paul, Update, SUS, Re:Oplev filter optimization for 2 poles and 2 zeros 
Message ID: 5540     Entry time: Sat Sep 24 17:45:56 2011     In reply to: 5537
Author: Paul 
Type: Update 
Category: SUS 
Subject: Re:Oplev filter optimization for 2 poles and 2 zeros 

Quote:

 (B) The resultant poles and zeros seem canceling each other but the filter still has a structure. Is something wrong ?

Quote from #5332

 Pole 1 frequency = 0.0497181 Hz 

 Pole 2 frequency = 2.01809 Hz 

 Zero 1 frequency = 0.0497181 Hz 

 Zero 2 frequency = 2.01809 Hz

 Ah yes, well noticed. I think I have tracked this down to just a bug in printing of fitting results: It was just printing the pole results for the zeros too. The results for the same fit now read:

 

 Finished with: 

 Pole 1 frequency = 0.0497181 Hz 

 Pole 2 frequency = 2.01809 Hz 

 Zero 1 frequency = 0.0972455 Hz 

 Zero 2 frequency = 6.50126 Hz 

Overall gain = 71970.1

EDIT: sorry, I forgot that when you write a reply, the author is still by default the person you are replying to unless you change it!

 

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