User`s guide

After Estimating Grey-Box Models
After E stimating Grey-Box Models
After estimatin g lin ear a n d non l in ear grey -b ox models, you can simula te the
model output using the
sim command. For more information, see Chapter 9,
“Simulation and Prediction”.
The toolbo x represents linear grey-box models using the
idgrey model object.
To convert g rey-box models to state-space form, use the
idss command,
as described in “Transform ing Between Line ar Model Re presentations” on
page 3-117. You can then analyze the model behavior using transient- and
frequency-response plots and other linear a nalysis plots.
The toolbox repres ents nonlinear grey -box models as
idnlgrey model objects.
These model objects store the parameter values resulting from the estimation.
You can access these parameters from the model objects to use these variables
incomputationintheMATLABworkspace.
Note Linear ization of nonlinear grey-box models is not supported.
You can import grey box models into a Simulink model using the S yste m
Identification Toolbox Block Library. For more information, see “Simulating
Model Ou tpu t” on page 11-6.
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