Learn more about Control System Toolbox

sisoinit - Configure SISO Design Tool at startup

Syntax

T = sisoinit(CONFIG)

Description

T = sisoinit(CONFIG) returns a template T for initializing Graphical Tuning window of the SISO Design Tool with a particular control system configuration CONFIG. Available configurations include:

• CONFIG=1 — C in forward path, F in series

• CONFIG=2 — C in feedback path, F in series

• CONFIG=3 — C in forward path, feedforward F

• CONFIG=4 — Nested loop configuration

• CONFIG=5 — Internal model control (IMC) structure

• CONFIG=6 — Cascade loop configuration

This figure shows the six configurations in order.

For each configuration, you can specify the plant models G,H, initialize the compensator C and prefilter F, and configure the open- and closed-loop views by filling the corresponding fields of the structure T. Then use sisotool(T)to start the SISO Design Tool in the specified configuration.

Output argument T is an object with object properties. These tables list the block and loop properties.

Block Properties

Block	Properties	Values
F	Name Description Value	String String LTI object
G	Name Value	String LTI object
H	Name Value	String LTI object
C	Name Descripton Value	String String LTI object

Loop Properties

Loops	Properties	Values
OL1	Name Description View	String String 'rlocus' 'bode'
CL1	Name Description View	String String 'bode'

Example

T = sisoinit(2);          % Single-loop configuration with
                          % C in the feedback path
T.G.Value = rss(3);       % Model for plant G
T.C.Value = tf(1,[1 2]);  % Initial compensator value
T.OL1.View = {'rlocus','nichols'}; % Views for tuning Open-Loop 
                                   % OL1
% Now launch SISO Design Tool using configuration T
sisotool(T)

See Also

sisotool

sigmaplot

sisotool

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