Uncertainty Analysis with Simulink Models

Simulate uncertainty effects, compute stability margins

Robust Control Toolbox™ software provides tools to model uncertain dynamics in Simulink^®. Using these tools, you can analyze how the uncertainty impacts the time-domain and frequency-domain behavior of a system modeled in Simulink.

Functions

`ufind`	Find uncertain variables in Simulink model
`ulinearize`	Linearize Simulink model with Uncertain State Space block
`usample`	Generate random samples of uncertain variables in a Simulink model
`diskmargin`	Disk-based stability margins of feedback loops

Blocks

Uncertain State Space	Simulate uncertain system in Simulink
MultiPlot Graph	Plot results of multiple simulations

Topics

Analyzing Uncertainty in Simulink
Robust Control Toolbox software lets you model and analyze uncertain dynamics in Simulink.
Specify Uncertainty Using Uncertain State Space Blocks
Use the Uncertain State Space block to represent uncertain elements in a Simulink model.
Simulate Uncertainty Effects
Simulate uncertain systems using nominal values or samples within the uncertainty range.
Simulate Uncertain Model at Sampled Parameter Values
This example shows how to simulate an uncertain model in Simulink® using the Uncertain State Space block.
Vary Uncertain Values Across Multiple Uncertain Blocks
For models with a large number of uncertain variables or multiple Uncertain State Space blocks, you can vary multiple uncertainty values simultaneously.
Stability Margins of a Simulink Model
Compute classical and disk-based gain and phase margins of a control loop modeled in Simulink.

Featured Examples

Robustness Analysis in Simulink

Specify uncertain systems in Simulink using the Uncertain State Space block. Perform linear analysis and Monte Carlo simulations to analyze the robustness of such systems.

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Linearization of Simulink Models with Uncertainty

Use Simulink Control Design™ linearization tools to compute an uncertain state-space (uss) model from a system modeled in Simulink.

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