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Which state is being plotted in multi-degree of freedom system when using bodeplot

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Drew  Mitchell
Drew Mitchell on 11 Jan 2020
Commented: Drew Mitchell on 15 Jan 2020
I am using bodeplot to get frequency response curves of a 2 degree of freedom system. I use the command
and it returns a frequency response curve and a phase angle curve. sys is a state space model.
My question is, for which state is it plotting the response? There are four states but I only get one set of plots(frequency and phase). And, how to I select the state I want?


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Accepted Answer

Raj on 13 Jan 2020
Can you share your system. 'bode' or 'bodeplot' for a MIMO statespace system will give you Bode plot (Magnitude and Frequency response) from each input to each output like this example:
will give you a plot like this:

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