Thanks Ali Farmani

Dear Mr Hilal,

The function 'tf' of Control Systems Toolbox creates the transfer function of the LTI system that you want to model.

In your particular case, if you want to model a sinusoidal system like, for example, y(t)=5*sin(2*t),

then the MATLAB code is:

tf([5*2],[1 0 2^2]),

what is equivalent to the sinusoidal Laplace Transform Y(s)=(5*2)/(s^2+2^2)

Here is a very useful link to:

https://www.mathworks.com/help/mpc/gs/linear-time-invariant-lti-models.html

Best regards,

Hugo

Thank you Mr Hugo