How to insert input into diffrential equation models in LabVIEW

[aliakbar]

Hi,

I am trying to model a system expressed in a set of differential equations.
using the differential equation function in LabVIEW you can define
a differential equation of the form:
dy/dt +y=0
Into LabVIEW. But How do you insert the input u(t) into that.
Even in example in the student edition of LabVIEW (the book) in pages 437-443
it explains the differential equation set up, but where the input function u(t) will go?

Thanks

[Jochen]

Chances to get a good answer for this question will increase largly if you post it to the LabVIEW board rather than to the motion control board.

Best regards,

Jochen Klier
National Instruments Germany