Simulink Control Design™ - MathWorks

If you prefer to specify disturbance attenuation at a particular location, rather than

sensitivity to disturbance, you can use “Disturbance Rejection Goal” on page 10-108.

Creation

In the Tuning tab of Control System Tuner, select New Goal > Sensitivity of feedback

loops to create a Sensitivity Goal.

Command-Line Equivalent

When tuning control systems at the command line, use TuningGoal.Sensitivity to

specify a disturbance rejection goal.

Sensitivity Evaluation

Use this section of the dialog box to specify the signal locations at which to compute the

sensitivity to disturbance. You can also specify loop-opening locations for evaluating the

tuning goal.

• Measure sensitivity at the following locations

Select one or more signal locations in your model at which to measure the sensitivity

to disturbance. To constrain a SISO response, select a single-valued location. For

example, to limit sensitivity at a location named 'y', click Add signal to list and

select 'y'. To constrain a MIMO response, select multiple signals or a vector-valued

signal.

• Evaluate disturbance rejection with the following loops open

Select one or more signal locations in your model at which to open a feedback loop for

the purpose of evaluating this tuning goal. The tuning goal is evaluated against the

open-loop configuration created by opening feedback loops at the locations you

identify. For example, to evaluate the tuning goal with an opening at a location named

'x', click Add signal to list and select 'x'.

TipTo highlight any selected signal in the Simulink model, click. To remove a signal

from the input or output list, click. When you have selected multiple signals, you can

reorder them using and. For more information on how to specify signal locations

for a tuning goal, see “Specify Goals for Interactive Tuning” on page 10-39.

10 Control System Tuning