How can I store the values of step response function in array which has time delay ?

Hi I have a transfer function like this:

>> num = [0.5 1];

>> den = [6 23.5 35.5 25.5 8.5 1];

>> G = tf(num,den,'Inputdelay',3)

G =

0.5 s + 1

exp(-3*s) * --------------------------------------------------

6 s^5 + 23.5 s^4 + 35.5 s^3 + 25.5 s^2 + 8.5 s + 1

What i want is to store its value in array but don't know how.

I tried

>> y=step(num,den);

>> t=0:0.1:30;

>> y

but it only shows the results without time delay...

plz help...

Answer 1

[Divija Aleti]

Hi,

Have a look at the following code which will give you the desired output.

num = [0.5 1];
den = [6 23.5 35.5 25.5 8.5 1];
G = tf(num,den,'Inputdelay',3);
t=0:0.1:30;
y=step(G,t)

For additional information on the 'step' function, refer to this link:

https://www.mathworks.com/help/control/ref/lti.step.html#mw_0ec1f77d-83b4-48d2-866a-1e29c3495a4c