To tune the identified plant using automated identification, click Auto Estimate. The
automated tuning response is not much better than the interactive tuning. The identified
plant and identification data do not match well. Change the plant structure to get a better
match:- In the Structure drop-down list, select Underdamped pair.
- Click and drag the 2nd order envelope to match the identified data as closely as
possible (almost critically damped). - Click Auto Estimate to fine tune the plant model.
7 PID Controller Tuning