I am having a transfer function having two zeros and four poles.
G(s)= (as^2+bs+c)/(s^4+ds^3+es^2 )
I need to convert TF to statespace such that it has two inputs i.e. matrix B has two columns.I know the commands tf2ss but it gives me statespace with one input.
Use tf2ss to find A,B,C,D , change B to add any inputs you want, then rebuilt a newmodel with ss function
a=1;b=2;c=1; d=1;e=1; N=[a b c]; D=[1 d e 0 0]; [A,B,C,D]=tf2ss(N,D) B=[B [1;0;0;0]] new_model=ss(A,B,C,D)
s = tf('s'); G= (s^2+s+1)/(s^4+s^3+s^2 );
Gss = ss([G G]);
Although I don't quite see the point in having two inputs to the same system (you could just add them together and get the same response).