How do I get the inverse laplace of this time function?

s = tf('s'); % specify a transfer function using a rational function in the Laplace variable s.

sysG1 = 2;
sysG2 = 1/(s^2+2*s);

sysG3 = series(sysG1, sysG2);
sysG4 = 1;

sysCL = feedback(sysG3, sysG4) % feedback(sysG4, sysG6) assumes negative feedback and is equivalent to feedback(sysG5, sysG6, -1)

F = ilaplace(sysCL)

The error comes from the last line saying 'Undefined function 'ilaplace' for input arguments of type 'tf'.'

Answer 1

[Walter Roberson]

Use the tf2sym function from https://www.mathworks.com/matlabcentral/fileexchange/10816-ovivero-mimotoolbox

Transfer functions created with tf() are not symbolic, but ilaplace() is only for symbolic expressions. Fortunately someone wrote a conversion routine.

[Rob Heck]

Thanks for the help!