state-space and imp2ss

Question

Elie Shami 2019-8-12

0
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https://ww2.mathworks.cn/matlabcentral/answers/475848-state-space-and-imp2ss

评论： Pablo Sordo 2021-3-12

Hi,

I'm trying to compute the convolution of the radiation damping integral in the time domain for a marine structure. I'm using state space in sumilink to do that.

Now I need to do a state space representation of a function K(t). I have a vector K and a time vector t.

What i'm doing is the following:

irf=[t,k];
[a,b,c,d] = imp2ss(irf,1); %state space calculation
 %Balanced model reduction via truncated and Schur methods
[A,B,C,D] = balmr(a,b,c,d,1,10);

Is this correct? can imp2ss be implemented to calculate the state space of a matrix?

Or should I do imp2ss of K only? (If I do this, how is the returned state sapce know the bound of the function?, k is only y values, how does it determine the x values?).

thank you,

Elie.