Simulink Control Design™ - MathWorks

Configuring Design Requirements

This example shows how to configure additional attributes of design requirements for use

with systune or looptune.

All TuningGoal requirements are objects that can be further configured by modifying

their default attributes. The display shows the list of such attributes. For example

R = TuningGoal.Gain('d','y',1)

R =

Gain with properties:

MaxGain: [1x1 zpk]

Focus: [0 Inf]

Stabilize: 1

InputScaling: []

OutputScaling: []

Input: {'d'}

Output: {'y'}

Models: NaN

Openings: {0x1 cell}

Name: ''

Three attributes are shared by multiple requirements. The Focus property specifies the

frequency band in which the requirement is active. For example,

R.Focus = [1 20];

limits the gain from d to y in the frequency interval [1,20] only. The Models property

specifies which models the requirement applies to (in the context of tuning for multiple

plant models). For example,

R.Models = [2 3 5];

indicates that the requirement only applies to the second, third, and fifth model in the

model array supplied to systune. Finally, the Openings property lets you specify

additional loop openings. For example

R = TuningGoal.Margins('Inner',6,45);

R.Openings = 'Outer';

13 Control System Tuning Examples