equivalent discrete system

hagai bar

2011 6 3

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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

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Paulo Silva 2011-6-3

在 MATLAB Online 中打开

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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')