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Remove all openings from list of permanent openings in slLinearizer or slTuner interface



removeAllOpenings(s) removes all openings from the list of permanent openings in the slLinearizer or slTuner interface, s. This function does not modify the Simulink® model associated with s.


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Create an slLinearizer interface for the scdcascade model.

sllin = slLinearizer('scdcascade');

Generally, you configure the interface with analysis points, openings, operating points, and parameter values. For this example, add two openings to the interface.


'y2m' and 'y1m' are the names of two feedback signals in the scdcascade model. The addOpening command adds these signals to the list of openings for sllin.

Remove all the openings from sllin.


To verify that all openings have been removed, display the contents of sllin, and examine the information about the interface openings.

slLinearizer linearization interface for "scdcascade":

No analysis points. Use the addPoint command to add new points.
No permanent openings. Use the addOpening command to add new permanent openings.
Properties with dot notation get/set access:
      Parameters         : [] 
      OperatingPoints    : [] (model initial condition will be used.)
      BlockSubstitutions : []
      Options            : [1x1 linearize.LinearizeOptions]

Input Arguments

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Interface to a Simulink model, specified as either an slLinearizer interface or an slTuner interface.

More About

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Permanent Openings

Permanent openings, used by the slLinearizer and slTuner interfaces, identify locations within a model where the software breaks the signal flow. The software enforces these openings for linearization and tuning. Use permanent openings to isolate a specific model component. Suppose that you have a large-scale model capturing aircraft dynamics and you want to perform linear analysis on the airframe only. You can use permanent openings to exclude all other components of the model. Another example is when you have cascaded loops within your model and you want to analyze a specific loop.

Location refers to a specific block output port within a model. For convenience, you can use the name of the signal that originates from this port to refer to an opening.

You can add permanent openings to an slLinearizer or slTuner interface, s, when you create the interface or by using the addOpening command. To remove a location from the list of permanent openings, use the removeOpening command.

To view all the openings of s, type s at the command prompt to display the interface contents. For each permanent opening of s, the display includes the block name and port number and the name of the signal that originates at this location. You can also programmatically obtain a list of all the permanent loop openings using getOpenings.

Version History

Introduced in R2013b