3. OPTIMIZE

The primary purpose is to find the PID parameter values returning as small error (setpoint- measurement) as possible.
To do that, just look at the error values obtained by moving in the controller parameters space.

Start with arbitrary range values for P and I, with or without a D value, to see the corresponding errors displayed on the z-axis.

Change the range values (P,I) to find the flat area of that error surface (PID area in which the errors are the smallest).

The display of the curves of equal error from this surface through a two-dimensional representation (iso research : level curves on that surface) allows checking the step responses through clicking the mouse down and the corresponding parameter values.

 

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