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## Re: How can I fix the error that produces this peak in Bode plot?

 From: Beginner1 Subject: Re: How can I fix the error that produces this peak in Bode plot? Date: Wed, 14 Oct 2020 07:10:21 -0500 (CDT)

```<https://octave.1599824.n4.nabble.com/file/t372684/rlocus.jpg>

With regard to that zero at +13333.33, I am not familiar with rlocus, but I
have plotted it without finding this zero at +13333 in the plot that would
make the system unstable I guess, if located on the right side of the plane.
Attached I send the plot. Anyway, I also wrote the command [r,k] =
rlocus(sys_1_vd), to see the exact numerical value of the roots, but did not
find any +13333.33 location.

On the other hand,  by obtaining the eigenvalues of the system, they all
have negative real part, except for 2 with a very small positive real part,
which it may be due to inaccuracies of the calculation. But I think, this
has no relationship with the zero you have pointed out to be located at
+13333.33.
-757.69960 +    0.00000i
-1487.09047 +    0.00000i
-28.89898 +  318.89945i
-28.89898 -  318.89945i
-25.27902 +  323.48505i
-25.27902 -  323.48505i
-0.00207 +  314.16966i
-0.00207 -  314.16966i
0.01004 +  314.15586i
0.01004 -  314.15586i
-0.00797 +  314.15227i
-0.00797 -  314.15227i

How can I see this zero at +13333.33?

--
Sent from: https://octave.1599824.n4.nabble.com/Octave-General-f1599825.html

```