Do I convert the units?

Hi all, I have rather simple question, but I'm not sure about the answer. If I simulate plant with a PID controller in simulink and variables have certain units (let say units are meters and seconds), do I have to convert those units if I'm working on a physical plant, that has different units (milimeters and minutes). Do the parameters of PID change?

Thanks in advance.

Answer 1

[Rick Rosson]

Yes.

I think Kp will remain unchanged, but Ki and Kd will both need to scale to account for the change in the time units.