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| From: | Luiz Antonio Maccari Junior |
| Subject: | [Octave-bug-tracker] [bug #63052] [octave forge] (control) Inverse operation with transfer function variables resulting in wrong results |
| Date: | Wed, 14 Sep 2022 15:26:51 -0400 (EDT) |
Follow-up Comment #9, bug #63052 (project octave):
Notice that when I said that FT was equal FT2 I was wrong.
Before I had
Transfer function 'FT' from input 'u1' to output ...
2 s^3 + 17 s^2 + 332.4 s + 1222
y1: -------------------------------
s^3 + 8 s^2 + 157 s + 580
Continuous-time model.
Transfer function 'FT2' from input 'u1' to output ...
2 s^3 + 17 s^2 + 331 s + 1180
y1: -----------------------------
s^3 + 8 s^2 + 157 s + 580
They were different.
Now with your modification I've got
Transfer function 'FT' from input 'u1' to output ...
2 s^3 + 17 s^2 + 331.2 s + 1179
y1: -------------------------------
s^3 + 8 s^2 + 157 s + 580
Continuous-time model.
Transfer function 'FT2' from input 'u1' to output ...
2 s^3 + 17 s^2 + 331 s + 1180
y1: -----------------------------
s^3 + 8 s^2 + 157 s + 580
Now the results are closer. I have tested on Control pkg 3.40 on linux. Could
someone test the modification on windows?
Other question: How could the result being different using the same packages
on different OS?
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