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Version 3.4 (R2009b) Robust Control
Toolbox™ Software

This table summarizes what's new in Version 3.4 (R2009b):

New Features and Changes
Version Compatibility Considerations
Fixed Bugs and Known Problems
Related Documentation at Web Site
Yes
Details below

Yes
Summary
Bug Reports
Includes fixes
Printable Release Notes: PDF

Current product documentation

New features and changes introduced in this version are described here:

New Option to Improve Robust Performance by Accounting for Real Uncertain Parameters

You can now improve robust performance by accounting for real uncertain parameters when designing controllers using µ-synthesis. The user-defined options you use in the dksyn command now includes a new option MixedMU. Set this option to 'on' to account for real uncertain parameters in your system. For more information, see the dkitopt, and dksyn reference pages.

New Command to Linearize Simulink Models with Uncertainty

If you have Simulink® Control Design™ software installed, you can take model uncertainty into account when linearizing a Simulink model. You can then use the resulting uncertain linearized model (uss object) to perform linear analysis and robust control design.

If your model already contains Uncertain State Space blocks, use the new ulinearize command to obtain an uss model. If you want to account for uncertainty in your linear analysis without using Uncertain State Space blocks, you can specify individual Simulink blocks to linearize to an uncertain variable. For more information, see "Computing Uncertain State-Space Models from Simulink Models" in the Robust Control Toolbox User's Guide.

New Interface for Simulating Effects of Uncertainty in Simulink Models

This version of the product provides a new interface to simulate the effects of uncertainty in Simulink® models. The interface includes the following:

For more information on simulating the effects of uncertainty using the new interface, see "Simulating Effects of Uncertainty" in the Robust Control Toolbox User's Guide.

New Command to Model Multiple LTI Responses as One Uncertain System

This version of the product includes a new ucover command that lets you model a family of LTI responses as one uncertain system. For more information, see the ucover reference page.

New and Updated Demos

The following new and updated demos illustrate use of the new features:

To access the demos, type

demo('toolbox','robust control')

Functions, Properties and Blocks Being Removed

For more information about the process of removing functions, see About Functions and Properties Being Removed in What's in the Release Notes.

Function, Property or Block Name
What Happens When You
Use Function or Property?
Use This Instead
Compatibility Considerations
usiminfo
Still runs
ufind
See New Interface for Simulating Effects of Uncertainty in Simulink Models.
usimfill
Still runs
ufind
See New Interface for Simulating Effects of Uncertainty in Simulink Models.
usimsamp
Still runs
usample
See New Interface for Simulating Effects of Uncertainty in Simulink Models.

USS System block

Still runs

Uncertain State Space block

See New Interface for Simulating Effects of Uncertainty in Simulink Models.
ltiarray2uss
Still runs
ucover
See New Command to Model Multiple LTI Responses as One Uncertain System.


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