MATLAB: Is there a way to use FRD(Frequency Response Data) in Simulink model instead of an LTI SS block

Question

While trying to simulate a control system , with FRD collected from actual hardware, is there a way to use this FRD data in their Simulink model instead of an LTI SS block?

Answer 1

You will need to fit an LTI model to the frequency response data. Attached are few links that may help the workflow.

Frequency Domain Identification: Estimating Models Using Frequency Domain Data

https://www.mathworks.com/help/ident/ug/frequency-domain-identification-estimating-models-using-frequency-domain-data.html

Simulate identified linear model in Simulink using 'Idmodel' :

https://www.mathworks.com/help/ident/ref/idmodel.html

https://www.mathworks.com/help/ident/ug/simulating-identified-model-output-in-simulink.html

Here is an example to Simulate Identified Linear Model in Simulink with Initial Conditions:

https://www.mathworks.com/help/ident/ug/simulating-identified-model-output-in-simulink.html#brhygvq-1