System Configurations for Online Frequency Response
Estimation
To use online frequency response estimation, you configure and deploy the Frequency
Response Estimator block. The block performs an estimation experiment by injecting test
signals in the plant and measuring system response.
The following schematic diagram illustrates a typical configuration for fitting the
Frequency Response Estimator block into a closed-loop system.
In this configuration, the block receives a control signal u, adds a perturbation Δu to it,
and injects the perturbed signal directly into the plant. It then measures the plant
response y and uses the result to compute the estimated frequency response.
Alternatively, you can configure the block such that the output is the perturbation Δu only.
You can then add this signal to the plant input yourself, as shown in the following
schematic diagram.
Online Frequency Response Estimation Basics