Frequency-Domain GoalsThe plots for frequency-domain tuning goals show the target response and the tuned
response in the frequency domain. The following plot, adapted from the example “Fixed-
Structure Autopilot for a Passenger Jet” (Control System Toolbox), shows a plot for a gain
goal (TuningGoal.Gain at the command line). This tuning goal limits the gain between
a specified input and output to a frequency-dependent profile. In the plot, the dashed line
shows the gain profile specified in the tuning goal. If the tuned system response (solid
line) enters the shaded region, the tuning goal is violated. In this case, the tuning goal is
satisfied at all frequencies.10 Control System Tuning