Simulink® Control Design™

linio - Construct linearization I/O settings for Simulink model

Syntax

io=linio('blockname',portnum)
io=linio('blockname',portnum,type)
io=linio('blockname',portnum,type,openloop)

Graphical Alternative

As an alternative to the linio function, create linearization I/O settings by using the right-click menu on the model diagram. See Inserting Linearization Points.

Description

io=linio('blockname',portnum) creates a linearization I/O object for the signal that originates from the outport with port number, portnum, of the block, 'blockname', in a Simulink model. The default I/O type is 'in', and the default OpenLoop property is 'off'. Use io with the function linearize to create linearized models.

io=linio('blockname',portnum,type) creates a linearization I/O object for the signal that originates from the outport with port number, portnum, of the block, 'blockname', in a Simulink model. The linearization I/O has the type given by type. A list of available types is given below. The default OpenLoop property is 'off'. Use io with the function linearize to create linearized models.

io=linio('blockname',portnum,type,openloop) creates a linearization I/O object for the signal that originates from the outport with port number, portnum, of the block, 'blockname', in a Simulink model. The linearization I/O has the type given by type and the open-loop status is given by openloop. A list of available types is given below. The openloop property is set to 'off' when the I/O is not an open-loop point and is set to 'on' when the I/O is an open-loop point. Use io with the function linearize to create linearized models.

Available linearization I/O types are:

• 'in', linearization input point

• 'out', linearization output point

• 'inout', linearization input then output point

• 'outin', linearization output then input point

• 'none', no linearization input/output point

To upload the settings in the I/O object to the Simulink model, use the setlinio function.

Example

Create a linearization I/O setting for the signal line originating from the Controller block of the magball model.

io(1)=linio('magball/Controller',1)

This syntax displays:

    Linearization IOs: 
--------------------------
Block magball/Controller, Port 1 is marked with the following 
properties:
 - No Loop Opening
 - An Input Perturbation

By default, this I/O is an input point. Create a second I/O setting within the object, io. This I/O originates from the Magnetic Ball Plant block, is an output point and is also an open-loop point.

io(2)=linio('magball/Magnetic Ball Plant',1,'out','on')

The new object, io, is displayed as follows:

    Linearization IOs: 
--------------------------
Block magball/Controller, Port 1 is marked with the following 
properties:
 - No Loop Opening
 - An Input Perturbation
 
Block magball/Magnetic Ball Plant, Port 1 is marked with the 
following properties:
 - An Output Measurement
 - A Loop Opening

See Also

getlinio, linearize, setlinio

linearize

linoptions