Re: Control System Design methods using Octave.

[shall689]

Doug Stewart-4 wrote
> On Wed, Dec 6, 2017 at 4:57 PM, shall689 <

> sahallacy@

> > wrote:
> 
>> Ok, I removed SampleFrequency from the tf function, i.e. tf(b,a) instead
>> of
>> tf(b,a,SampleFrequency).
>>
>> The bode plot seem to match each other much better and the frequency
>> range
>> is a little better, with the only issue is that the max discrete
>> frequency
>> is 10 (>> pi).
>>
>> Is there some type of issue with the bode() function?
>>
>>
>> <http://octave.1599824.n4.nabble.com/file/t372348/BodePlot2.png>
>>
>>
>>
>> --
>> Sent from: http://octave.1599824.n4.nabble.com/Octave-General-
>> f1599825.html
>>
>>
> Hi Shall
> If you would post your exact code, for me to run, then I am sure that I
> can
> answer your questions.
> https://pastebin.com/   is one way to post it.
> 
> 
> 
> -- 
> DAS
> 
> <https://linuxcounter.net/user/206392.html>
> 
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I looked at invfreqz.m and found out that that function is missing the
"superior algorithm that guarantees stability of the resulting linear system
and searches for the best fit using a numerical, iterative scheme" as
mentioned in matlab's documentation.

Stephen



--
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