Click Importing an LTI system, and in the list, select sys. Then, click "OK" to import the
frd system into PID Tuner. The automated design returns a stabilizing controller. Click
Add Plot, and select Open-Loop Bode plot. The plot shows reasonable gain and phase
margin. Click Show Parameters to see the gain and phase margin values. Time domain
response plots are not available for frd plant models.
Design PID Controller Using Estimated Frequency Response