I figured it out. You could extract each input-ouput transfer function via g=tf(G.Numerator(i,j),G.Denominator(i,j)) where g is the SISO function you want and G is the original MIMO function and i,j are indeces of output and input respectively. That way when you use bode(g) you can estimate all stability margins.
Stability margins on Nyquist plot for MIMO control systems
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Alexander Babin
le 10 Mai 2020
Réponse apportée : Alexander Babin
le 11 Mai 2020
Dear Friends!
I hope you are all doing fine in these strange times!
I have a question regarding the stability margins for a MIMO control system transfer function. I have a nyquist plot of a systen as a 2 by 2 window plot, as there are 2 inputs and 2 outputs. To make a long story short, this is what choice I have when I want to plot characteristics of these plots (see attached screenshot)
As you can see, I have no 'Stability margins' options, as for a SISO system I usually have 2 options to choose from- minimum and all stability margins.
If there is any option of plotting these margins, please do tell.
And take care of yourselves and one another!
Cheres, Alexander
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