Hello Ilaria,
To compute the system parameters ( A(k) ), ( B(k) ), ( C(k) ), and ( D(k) ) for a state-space model in MATLAB, you can use the System Identification Toolbox.
Please go through the following code sample to proceed further,
data = iddata(y, u, Ts); % y: output data, u: input data, Ts: sample time
sys = ssest(data, n); % n: order of the system
[A, B, C, D] = ssdata(sys);
Please go through the following documentation to understand more about iddata and ssest MATLAB functions,
I hope this helps!
