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Version 2.2 (R2007b) Simulink Control Design Software

This table summarizes what's new in Version 2.2 (R2007b):

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems	Related Documentation at Web Site
Yes Details below	No	Bug Reports Includes fixes	No

New features and changes introduced in this version are

• Ability to Linearize Models with Model-Reference Blocks by Any Linearization Method

• Ability to Design Compensators for Models Containing Model-Reference Blocks

• Ability to Generate Linearized Models with Exact Time-Delay Representations

• Ability to Linearize Periodic Function-Call Subsystems

Ability to Linearize Models with Model-Reference Blocks by Any Linearization Method

You can now perform any type of linearization for models containing Model blocks that reference other Simulink models.

Previously, you could only perform numerical perturbation linearization for models containing Model blocks. Now, you can also perform block-by-block linearization for such models when you set the simulation mode of the Model blocks to Normal.

For more information on linearizing models containing model-reference blocks, see Model Reference Blocks in the Simulink Control Design User's Guide.

Ability to Design Compensators for Models Containing Model-Reference Blocks

You can now design compensators for tunable blocks inside external models referenced by your model. Your model references such external models by using Model blocks. You can also update the tunable blocks in the external model with the new compensator designs.

To view and select tunable blocks for compensator design from the referenced model, set the simulation mode of the Model block to Normal.

For more information about the types of blocks that you can tune, see Selecting Blocks to Tune in the Simulink Control Design documentation.

Ability to Generate Linearized Models with Exact Time-Delay Representations

You can now use the Simulink Control Design software to compute linearized models with exact time-delay representations. Time delays in the original nonlinear model can result from any of the following blocks:

• Transport Delay

• Variable Time Delay

• Variable Transport Delay

• Unit Delay

• Integer Delay

Previously, you could only achieve approximate linearizations of models with continuous time delays using a Padé approximation.

For more information on linearizing models with time delays, see Linearizing Models with Time Delays in the Simulink Control Design User's Guide.

Ability to Linearize Periodic Function-Call Subsystems

You can now linearize periodic function-call subsystems with a constant sample time as discrete subsystems. You must set the sample time of the function-call trigger block to equal the sample time of the function-call generator block.

For more information on function-call subsystems, see Function-Call Subsystems in the Simulink documentation.

Version 2.3 (R2008a) Simulink Control Design Software

Version 2.1 (R2007a) Simulink Control Design Software

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