Simulink Control Design™ - MathWorks

Online Frequency Response Estimation During

Simulation

This example shows how to use the Frequency Response Estimator block to perform

online frequency response estimation during simulation of the model in Simulink®. This

approach can be useful when you plan to deploy the block for online estimation of a

physical plant. Testing the estimation algorithm and experiment parameters against a

Simulink model of the plant before deployment can help ensure that online estimation is

safe for your plant.

Control System Model

This example uses a model that already contains the Frequency Response Estimator block

configured for estimation. Open the model.

mdl = "OnlineFreqRespEstimEx.slx";

open_system(mdl)

The model contains a plant in a closed-loop configuration with a PI controller. The

Frequency Response Estimator block accepts the control signal as the input u. It feeds

the control signal plus a perturbation into the plant input. You specify properties of the

perturbation signal using parameters of the block.

Online Frequency Response Estimation During Simulation