Transfer Function

[tripper]

i m trying to create TF model

 num = [25];

den = [1.6 1];

G = tf(num,den);

but gives the error undefined symbol tf

i don t understand why??same with lsim

[altenbach]

Do you have the control design toolkit?

[Barp]

This function is NOT part of the LabVIEW Mathscript.

To add this functionality, you need to install Control Design Toolkit 2.1.1 (if you have LabVIEW 8.2) or the Control Design and Simulation Module (if you have LabVIEW 8.5 or 8.6). If don't have the module, do not try to install the toolkit 2.1.1 or earlier on LabVIEW 8.5 or 8.6 because the mathscript will not work.

Hope this helps. Let me know if you have more questions.

Message Edited by Barp on 07-20-2009 07:15 AM