equivalent discrete system

if i have the A,B,C and D matrices of the continuous system, is there a way to get the equivalent discrete system(with a sampling time of my choice)? i know how to do the calculations myself to get As,Bs,Cs,Ds matrices but was just wondering if there's a function that can save me some time thanks

Answer 1

[Paulo Silva]

use the c2d function from the Control System Toolbox

Example from ctms

M = 1;
b = 10;
k = 20;

A = [0       1;  
    -k/M   -b/M];

B = [  0;
    1/M];   

C = [1 0];

D = [0];

Ts = 1/100;

sys = ss(A,B,C,D);
sys_d = c2d(sys,Ts,'zoh')

[hagai bar]

thanks alot- exactly what i needed:)