How can i get any response of this state space model?

Hi,

I want to get response of my state space model for any input i create. For this purpose, i use lsim command, but take error message from MATLAB.

My input should be constant for 0.01 second. I add my codes below.

State space model i have is cell-array format. At the code box, you will see the model as sys{1}, nevertheless i have wrote the A,B,C,D matrices.

Thanks for your help!

Note: I know that step command can be used for this, but in the next steps, i will create different and various input signals. So, i should learn the method of creating of user-defined input signals.

A =

x1 x2

x1 0.4343 -10.59

x2 0.6581 -0.9007

B =

u1

x1 0.07221

x2 0.1236

C =

x1 x2

y1 7.463 10.63

y2 0 1

D =

u1

y1 0

y2 0

time=0:0.001:0.01;  
u=[5 ; 5];
lsim(sys{1},u,time)
grid on
%Error using DynamicSystem/lsim (line 97)
%When simulating the response to a specific input signal, the input data U must be a matrix with as many rows as samples in the time vector T, and as many columns as input channels.

Answer 1

[Ameer Hamza]

Vector 'u' must have same number of elements as 't'

u = 5*ones(size(t));