Simulink Control Design™ - MathWorks

Quick Loop Tuning of Feedback Loops in Control System

Tuner

This example shows how to tune a Simulink model of a control system to meet a specified

bandwidth and specified stability margins in Control System Tuner, without explicitly

creating tuning goals that capture these requirements. You can use a similar approach for

quick loop tuning of control systems modeled in MATLAB.

This example demonstrates how the Quick Loop Tuning option of Control System Tuner

generates tuning goals from your crossover frequency and gain and phase margin

specifications. This option lets you quickly set up SISO or MIMO feedback loops for

tuning using a loop-shaping approach. The example also shows how to add further tuning

requirements to the control system after using the Quick Loop Tuning option.

Quick Loop Tuning is the Control System Tuner equivalent of the looptune command.

Set up the Model for Tuning

Open the Simulink model.

open_system('rct_distillation')

This model represents a distillation column, captured in the two-input, two-output plant G.

The tunable elements are the decoupling gain matrix DM, and the two PI controllers, PI_L

and PI_V. (For more information about this model, see “Decoupling Controller for a

Distillation Column” (Control System Toolbox).)

10 Control System Tuning