Simulink Control Design™ - MathWorks

Control System Designer Tuning Methods

Using Control System Designer, you can tune compensators using various graphical

and automated tuning methods.

Graphical Tuning Methods

Use graphical tuning methods to interactively add, modify, and remove controller poles,

zeros, and gains.

Tuning Method Description Useful For

Bode Editor Tune your compensator to achieve

a specific open-loop frequency

response (loop shaping).

Adjusting open-loop bandwidth

and designing to gain and phase

margin specifications.

Closed-Loop

Bode Editor

Tune your prefilter to improve

closed-loop system response.

Improving reference tracking,

input disturbance rejection, and

noise rejection.

Root Locus

Editor

Tune your compensator to produce

closed-loop pole locations that

satisfy your design specifications.

Designing to time-domain design

specifications, such as maximum

overshoot and settling time.

Nichols Editor Tune your compensator to achieve

a specific open-loop response (loop

shaping), combining gain and

phase information on a Nichols

plot.

Adjusting open-loop bandwidth

and designing to gain and phase

margin specifications.

When using graphical tuning, you can modify the compensator either directly from the

editor plots or using the compensator editor. A common design approach is to roughly

tune your compensator using the editor plots, and then use the compensator editor to

fine-tune the compensator parameters. For more information, see “Edit Compensator

Dynamics” (Control System Toolbox)

The graphical tuning methods are not mutually exclusive. For example, you can tune your

compensator using both the Bode editor and root locus editor simultaneously. This option

is useful when designing to both time-domain and frequency-domain specifications.

For examples of graphical tuning, see the following:

9 Classical Control Design