Next Steps After Getting an Accurate Model

For linear parametric models, you can perform the following operations:

• Transform between continuous-time and discrete-time representation.

  See Transforming Between Discrete-Time and Continuous-Time Representations.

• Transform between linear model representations, such as between polynomial, state-space, and zero-pole representations.

  See Transforming Between Linear Model Representations.

• Extract numerical data from transfer functions, pole-zero models, and state-space matrices.

  See Extracting Numerical Model Data.

For nonlinear black-box models (idnlarx and idnlhw objects), you can compute a linear approximation of the nonlinear model. See Linear Approximation of Nonlinear Black-Box Models.

System Identification Toolbox™ models in the MATLAB^® workspace are immediately available to other MathWorks^® products. However, if you used the System Identification app to estimate models, you must first export the models to the MATLAB workspace.

Tip

To export a model from the app, drag the model icon to the To Workspace rectangle. Alternatively, right-click the model to open the Data/model Info dialog box. Click Export.

If you have the Control System Toolbox™ software installed, you can import your linear plant model for control-system design. For more information, see Using Identified Models for Control Design Applications.

Finally, if you have Simulink^® software installed, you can exchange data between the System Identification Toolbox software and the Simulink environment. For more information, see Simulate Identified Model in Simulink.