Version 3.6 (R2011a) Robust Control Toolbox Software

This table summarizes what's new in Version 3.6 (R2011a):

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems
Yes Details below	No	Bug Reports Includes fixes

New features introduced in this version:

Enhanced Workflow for H-Infinity Synthesis of Fixed-Structure Control Systems

New Generalized LTI models in Control System Toolbox™ allow you to model control systems with tunable parameters. Using these models simplifies controller tuning with hinfstruct. You can model a closed-loop transfer function, including tunable parameters, as a generalized state-space (genss) model and directly tune the parameters to minimize the closed-loop gain. The hinfstruct command can tune any fixed-structure SISO or MIMO control system using H_∞ synthesis techniques.

Additionally, new realp and genmat objects let you create parametric expressions. You can use such expressions to create custom tunable components. For example, you can define a low-pass filter parametrized by its cutoff frequency, or an observer-based controller parametrized by the state-feedback and observer gains.

For more information about creating tunable Generalized LTI models, see Models with Tunable Coefficients in the Control System Toolbox User's Guide.

For more information about H_∞ tuning with hinfstruct, see Tuning Fixed Control Architectures in the Robust Control Toolbox Getting Started Guide.

For examples of designing controllers for several different architectures using hinfstruct, see the following updated and new demos:

• Loop Shaping Design with HINFSTRUCT (updated)

• Tuning of a Two-Loop Autopilot (updated)

• Decoupling Controller for a Distillation Column (updated)

• Multi-Loop PID Control of a Robot Arm (updated)

• Fixed-Structure Autopilot for a Passenger Jet (new)

Version 4.0 (R2011b) Robust Control Toolbox Software

Version 3.5 (R2010b) Robust Control Toolbox Software

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