Learn more about Simulink Design Optimization

Version 1.1 (R2009b) Simulink Design Optimization Software

This table summarizes what's new in V 1.1 (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:

• New Algorithm Option for fmincon (Gradient descent) and lsqnonlin (Nonlinear least squares) Methods, LargeScale (Model size) Option Removed

• Support for Optimization-Based Compensator Design for Plants with Delays or Specified as Frequency-Response Data

• Functions and Properties Being Removed

New Algorithm Option for fmincon (Gradient descent) and lsqnonlin (Nonlinear least squares) Methods, LargeScale (Model size) Option Removed

This version of the product includes changes at the command line to make the fmincon and lsqnonlin methods to be consistent with the Optimization Toolbox™ software:

• Algorithm property renamed to Method.

• New Algorithm option.

• LargeScale option removed.

The following table summarizes values of the new Algorithm option.

Method	Algorithm Values
fmincon	'active-set' (default) 'trust-region-reflective' 'interior-point'
lsqnonlin	'trust-region-reflective' (default) 'levenberg-marquardt'

Previously, to specify the algorithm at the command line, you set the LargeScale option to 'on' or 'off'. If you used LargeScale='on' in a previous release, use Algorithm='trust-region-reflective' instead. If you used LargeScale='off', use the following instead:

• For fmincon – Use Algorithm='active-set'.

• For lsqnonlin – Use Algorithm='levenberg-marquardt'.

For more information about these options, see the Optimization Toolbox User's Guide.

The Options dialog box includes the following updates to the Gradient descent and Nonlinear least squares methods that correspond to the command-line changes.

• Algorithm option is renamed to Method.

• Model size option is deprecated and replaced by Algorithm.

  When you load a saved project, the software uses the Model size value to update the Algorithm value automatically.

When you optimize parameters using the Gradient Descent method, an Algorithm value other than the default value of Active-Set can lead to a slightly different result.

For more information on how to specify the method and its algorithm, see Specifying Estimation Options and Specifying Optimization Options.

Support for Optimization-Based Compensator Design for Plants with Delays or Specified as Frequency-Response Data

You can now use optimization-based compensator design for frequency-response data (FRD) plants or plants with exact time delays in the SISO Design Tool. For more information, see Designing Optimization-Based Controllers for LTI Systems and Designing Linear Controllers for Simulink Models in the Simulink^® Design Optimization™ User's Guide.

Functions and Properties Being Removed

For more information about the process of removing functions, see "Removal of Functions and Function Elements" in What Is in the Release Notes.

Function or Property Name	What Happens When You Use Function or Property?	Use This Instead	Compatibility Considerations
Algorithm	Errors	Method	See New Algorithm Option for fmincon (Gradient descent) and lsqnonlin (Nonlinear least squares) Methods, LargeScale (Model size) Option Removed
LargeScale	Errors	Algorithm	See New Algorithm Option for fmincon (Gradient descent) and lsqnonlin (Nonlinear least squares) Methods, LargeScale (Model size) Option Removed

Simulink Design Optimization Release Notes

Version 1.0 (R2009a) Simulink Design Optimization Software

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