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Nonlinear Grey-Box Models

Estimate coefficients of nonlinear differential, difference and state-space equations


nlgreyest Estimate nonlinear grey-box model parameters
idnlgrey Nonlinear grey-box model
pem Prediction error estimate for linear and nonlinear model
findstates Estimate initial states of model
init Set or randomize initial parameter values
getinit Values of idnlgrey model initial states
setinit Set initial states of idnlgrey model object
getpar Parameter values and properties of idnlgrey model parameters
setpar Set initial parameter values of idnlgrey model object
getpvec Model parameters and associated uncertainty data
setpvec Modify value of model parameters
sim Simulate response of identified model
nlgreyestOptions Option set for nlgreyest
findstatesOptions Option set for findstates
simOptions Option set for sim

Examples and How To

Estimate Nonlinear Grey-Box Models

How to define and estimate nonlinear grey-box models at the command line.

Creating IDNLGREY Model Files

This example shows how to write ODE files for nonlinear grey-box models as MATLAB and C MEX files.

Estimate Coefficients of ODEs to Fit Given Solution

This example shows how to estimate model parameters using linear and nonlinear grey-box modeling.


Supported Grey-Box Models

Types of supported grey-box models.

Data Supported by Grey-Box Models

Types of supported data for estimating grey-box models.

Choosing idgrey or idnlgrey Model Object

Difference between idgrey and idnlgrey model objects for representing grey-box model objects.

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