Wrong Nyquist Diogram in Linear Analysis using Transport Delay

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Artiom Diulgher
Artiom Diulgher 2020-10-26
编辑： Artiom Diulgher 2020-10-26
I use Matlab R2020a, Windows 10.
I simulate simple scheme in Simulink. I attached input and output Linear Analysis point and opend Model Linearizer app. After this I tried to draw Nyquist Diogram. I expected pure circle, but I got circle with lines (seems like chords).
Also my scheme seems so:
Here I just wanted to test "dead time" in some process. I noticed that I got these wrong lines only when Transport Delay block has some delay.
It seems like bug. So I would like to:
  1. Notify about this bug;
  2. Achive the some circle (withot lines) in Simulink in other ways.
Thank you for reading.

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