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Modeling Saturation - Sensor or Acutuator


I am trying to do a control simulation using Control System
Professional of a motor drive system, but I am having a problem. How do
I model saturation of a physical system?

For instance, when I model an electric motor driving a belt and pulley
system, the controller will command torques and currents that the
system cannot realistically provide. Thus, I need to clip these values
in order to prevent them from getting too high.

How do I do this? Any ideas? I am sure I am not the first person to
have asked this question!

Thanks!

Gary


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