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Nonlinear Grey-Box Model

Simulate nonlinear grey-box model in Simulink software


System Identification Toolbox


Simulates systems of nonlinear grey-box (idnlgrey) models.


Input signal to the model.


Output signal from the model.



Name of idnlgrey variable in the MATLAB® workspace.

Initial state

Specify the initial states as one of the following:

  • 'z': Specifies zero, which corresponds to a system starting from rest.

  • 'm': Specifies the internal initial states of the model.

  • Vector of size equal to the number of states in the idnlgrey object.

  • An initial state structure array. For information about creating this structure, type help idnlgrey/sim in the MATLAB Command Window.

Introduced in R2008a