how to get the state space realization (A,B,C,D) from the open loop transfer function T(q) for discrete system?

The open loop transfer function for discrete system is as:

T(q)=[0.05/(q^3-0.95q^2) 0; 0 0.2/(q^6-0.8q^5)]

how to get the state space realization (A,B,C,D) in Matlab? Further, I wonder if the 'q' is similar to 's' or 'z'?

 

Review this:
http://www-ccrma.stanford.edu/~jos/filters/Converting_State_Space_Form_Hand.html

Then dig around here:
http://www.mathworks.com/access/helpdesk/help/toolbox/control/ref/canon.html

http://www.mathworks.com/access/helpdesk/help/toolbox/control/ref/ss.html

Then pull out those Calc + advanced math books, aspirin, and coffee... and do some mental aerobics for a while. Being able to visualize transforms helps. Understanding Heaviside's writings also helps.

 

Look I am really a beginer but I had to do the similar two weeks ago. I seems that is as easy as the tf2ss matlab function if I am not mistaken.

Marko

 

q - don't know what it is
s - laplace operator (omega + j*sigma)
z - discrete form (e^^T*s)

Xderived(t) = A*X(t) + B*U(t)
V(t) = C*X(t) + D*U(t)
and
V(s) = T(s)*U(s)