Control System Toolbox Release Notes

New Features

This section summarizes the new features and enhancements introduced in the Control System Toolbox 6.2.

New Command-Line API for Customizing Plots

The Control System Toolbox now provides a command-line API for customizing units, labels, limits, and other plot options. You can now change default plot options before generating a plot, or modify plot properties after creation.

For a detailed description of the commands, see the online Control System Toolbox documentation.

New SISO Design Constraint Types

You can now create

• Single piecewise linear constraints for root-locus and Bode plots
• Gain/phase exclusion regions for Nichols plots

Design constraints are displayed as shaded regions.

New Bode and Nichols Plot Options

When editing Bode and Nichols plots, you can now

• Manually set the lower limit of the magnitude
• Adjust the phase offsets by multiples of 360 degrees to facilitate comparing multiple responses

New Commands for Model Approximation and Order Reduction

New commands have been added for model approximation and order reduction:

• hsvd computes and plots the Hankel singular values
• balred computes low-order approximations using a numerically-stable, balancing-free algorithm. You can perform multiple order reductions with a single command

Control System Toolbox 6.2 Release Notes

Major Bug Fixes

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