Simulink Control Design™ - MathWorks

Quick Loop Tuning

Purpose

Tune SISO or MIMO feedback loops using a loop-shaping approach in Control System

Tuner.

Description

Quick Loop Tuning lets you tune your system to meet open-loop gain crossover and

stability margin requirements without explicitly creating tuning goals that capture these

requirements. You specify the feedback loop whose open-loop gain you want to shape by

designating the actuator signals (controls) and sensor signals (measurements) that form

the loop. Actuator signals are the signals that drive the plant. The sensor signals are the

plant outputs that feed back into the controller.

You enter the target loop bandwidth and desired gain and phase margins. You can also

specify constraints on pole locations of the tuned system, to eliminate fast dynamics.

Control System Tuner automatically creates Tuning Goals that capture your specifications

and ensure integral action at frequencies below the target loop bandwidth.

Creation

In the Tuning tab of Control System Tuner, select New Goal > Quick Loop Tuning to

specify loop-shaping requirements.

Command-Line Equivalent

When tuning control systems at the command line, use looptune (for slTuner) or

looptune for tuning feedback loops using a loop-shaping approach.

Feedback Loop Selection

Use this section of the dialog box to specify input, output, and loop-opening locations for

evaluating the tuning goal.

• Specify actuator signals (controls)

10 Control System Tuning