Robust Control Toolbox

Tuning a Decentralized Control System for a Helicopter   5:45  

Tune a complex flight control system for a helicopter.

Robustness of Servo Controller for DC Motor  

In this demo, we show how to use Robust Control Toolbox™ to model uncertainty in DC motor parameters and analyze the effect of this uncertainty on motor controller performance.

Building and Manipulating Uncertain Models  

In this demo, we use Robust Control Toolbox™ to show how to build uncertain state-space models and analyze the robustness of feedback control systems with uncertain elements. We demonstrate how to specify uncertain physical parameters and create uncertain state-space models from these parameters. You will see how to evaluate the effects of random and worst-case parameter variations.

Modeling a Family of Responses as an Uncertain System  

This demo shows how to use Robust Control Toolbox™ to model a family of LTI responses as an uncertain system. This can be useful for fitting an uncertain model to a set of frequency responses representative of the system variability, or for reducing the complexity of an existing uncertain model to facilitate the synthesis of robust controllers.

Robust Stability, Robust Performance and Mu Analysis  

This demo shows how to use Robust Control Toolbox™ to analyze and quantify the robustness of feedback control systems, including modeling errors and parameter variations. We’ll look at how to test for robust stability and how to gain insight into the connection with mu-analysis.

Getting Reliable Estimates of Robustness Margins  

In this demo we look at how to modify the uncertainty description to avoid discontinuities and get reliable estimates of the robustness margins.

Real Mu Analysis  

This example shows how to use Robust Control Toolbox™ to analyze the robustness of an uncertain system with only real parametric uncertainty.

Robustness Analysis in Simulink  

Robust Control Toolbox™ provides Simulink^® blocks and helper functions to specify and analyze uncertain systems in Simulink. This demo shows how to use these tools to perform Monte Carlo simulations of uncertain systems.

Linearization of Simulink Models with Uncertainty  

This demo shows how to compute uncertain linearizations using Robust Control Toolbox™ and Simulink^® Control Design™.

Loop Margins for an Airframe Autopilot    

Analyze the closed-loop robustness of Simulink models with specified loop-breaking points.

Tuning of a Two-Loop Autopilot  

This demo shows how to use Robust Control Toolbox™ to tune a two-loop autopilot controlling the pitch rate and vertical acceleration of an airframe.

Tuning of a Digital Motion Control System    

Tune a digital motion control system.

Decoupling Controller for a Distillation Column  

This demo shows how to use Robust Control Toolbox™ to decouple the two main feedback loops in a distillation column.

Tuning of Cascaded PID Loops    

Tune the inner and outer loops of a cascade architecture.

Loop Shaping Design with HINFSTRUCT  

This demo shows how to use the hinfstruct command to shape the open-loop response of a hard drive feedback control system.

Fixed-Structure Autopilot for a Passenger Jet  

This demo shows how to use Robust Control Toolbox™ to tune the standard configuration of a longitudinal autopilot.

Control of a Two-Tank System  

In this demo, we use Robust Control Toolbox™ to demonstrate the application of robust control design (using D-K iteration) and robustness analysis to a process control problem.

Control of a Spring-Mass-Damper System Using Mixed mu-Synthesis  

This demo shows how to perform mixed mu-synthesis in Robust Control Toolbox™. We show how to design a robust controller for a two mass-spring-damper system with uncertainty in the spring stiffness connecting the two masses.

Simultaneous Stabilization Using Robust Control  

This demo shows how to design a high-performance controller for a family of unstable plants.

Loop Shaping of HIMAT Pitch Axis Controller  

In this demo we use Robust Control Toolbox™ to design a multi-input, multi-output controller by shaping the gain of an open-loop response across frequency. This technique is applied to controlling the pitch axis of a HIMAT aircraft.

Control of F-14 Lateral Axis using mu-Synthesis  

In this demo wel show how to use mu-analysis and synthesis tools in the Robust Control Toolbox™. Our example describes the design of a robust controller for the lateral-directional axis of an F-14 aircraft during powered approach to landing.

First-Cut Robust Design  

This demo uses Robust Control Toolbox™ commands to design a robust controller with standard performance objectives.

Improving Stability While Preserving Open-Loop Characteristics    

Improve the stability robustness of a closed-loop system while approximately maintaining the high-gain and low-gain characteristics of the open-loop response.

Simplifying Higher-Order Plant Models  

This demo shows how to use Robust Control Toolbox™ to approximate high-order plant models by simpler, low-order models.