Control System Designer

Design single-input, single-output (SISO) controllers

Description

The Control System Designer app lets you design single-input, single-output (SISO) controllers for feedback systems modeled in MATLAB^® or Simulink^® (requires Simulink Control Design™ software).

Using this app, you can:

• Design controllers using:

  • Interactive Bode, root locus, and Nichols graphical editors for adding, modifying, and removing controller poles, zeros, and gains.

  • Automated PID, LQG, or IMC tuning.

  • Optimization-based tuning (requires Simulink Design Optimization™ software).

  • Automated loop shaping (requires Robust Control Toolbox™ software).

• Tune compensators for single-loop or multiloop control architectures.

• Analyze control system designs using time-domain and frequency-domain responses, such as step responses and pole-zero maps.

• Compare response plots for multiple control system designs.

• Design controllers for multimodel control applications.

More

Limitations

When using Control System Designer in MATLAB Online™, the following features are not available:

• Designing of controllers in Simulink

• Variable editor

×

Open the Control System Designer App

• MATLAB Toolstrip: On the Apps tab, under Control System Design and Analysis, click the app icon.

• MATLAB command prompt: Enter controlSystemDesigner.

• Simulink Toolstrip: On the Apps tab, under Control Systems, click the app icon.

Examples

Related Examples

• Control System Designer Tuning Methods
• Bode Diagram Design
• Root Locus Design
• Design Compensator Using Automated Tuning Methods
• Design Multiloop Control System
• Analyze Designs Using Response Plots
• Compare Performance of Multiple Designs
• Multimodel Control Design

Programmatic Use

controlSystemDesigner

controlSystemDesigner opens the Control System Designer app using the following default control architecture:

The architecture consists of the LTI objects:

• G — Plant model

• C — Compensator

• H — Sensor model

• F — Prefilter

By default, the app configures each of these models as a unit gain.

controlSystemDesigner(plant)

controlSystemDesigner(plant) initializes the plant, G, to plant. plant can be any SISO LTI model created with ss, tf, zpk or frd, or an array of such models.

controlSystemDesigner(plant,comp)

controlSystemDesigner(plant,comp) initializes the compensator, C, to the SISO LTI model comp.

controlSystemDesigner(plant,comp,sensor)

controlSystemDesigner(plant,comp,sensor) initializes the sensor model, H, to sensor. sensor can be any SISO LTI model or an array of such models. If you specify both plant and sensor as LTI model arrays, the lengths of the arrays must match.

controlSystemDesigner(plant,comp,sensor,prefilt)

controlSystemDesigner(plant,comp,sensor,prefilt) initializes the prefilter model, F, to the SISO LTI model prefilt.

controlSystemDesigner(views)

controlSystemDesigner(views) opens the app and specifies the initial graphical editor configuration. views can be any of the following character vectors, or a cell array of multiple character vectors.

• 'rlocus' — Root locus editor

• 'bode' — Open-loop Bode Editor

• 'nichols' — Open-loop Nichols Editor

• 'filter' — Bode Editor for the closed-loop response from prefilter input to the plant output

In addition to opening the specified graphical editors, the app plots the closed-loop, input-output step response.

controlSystemDesigner(views,plant,comp,sensor,prefilt)

controlSystemDesigner(views,plant,comp,sensor,prefilt) specifies the initial plot configuration and initializes the plant, compensator, sensor, and prefilter using the specified models. If a model is omitted, the app uses the default value.

controlSystemDesigner(initData)

controlSystemDesigner(initData) opens the app and initializes the system configuration using the initialization data structure initdata. To create initdata, use sisoinit.

controlSystemDesigner(sessionFile)

controlSystemDesigner(sessionFile) opens the app and loads a previously saved session. sessionFile is the name of a session data file on the MATLAB path. This data includes the current system architecture and plot configuration, and any designs and responses saved in the Data Browser.

To save a session, in the Control System Designer app, on the Control System tab, click Save Session.

Compatibility Considerations

Support for opening SISO Design Tool sessions saved before release R2016a has been removed

Errors starting in R2021b

Support for opening SISO Design Tool sessions saved before release R2016a will be removed in release R2021b.

If you have sessions saved before release R2016a, open and resave the session files using Control System Designer in any release from R2016a through R2021a.