The dialog box gives access to so called Process Models, and operates on the Working Data set in the main ident window.
Process Models are simple continuous time models that are described in terms of the main time constants, the static gain, a possible dead-time, and a possible process zero (Non-constant numerator). Multi-input models can be handled, and noise descriptions of certain structures can be added.
A typical such model is the transfer function
G(s) = K exp(-Td s)/(1+ s Tp1)
How to define the model structure
Parameter values and constraints
More... about the Procss Models dialog (Disturbance Model, Focus, 'Initial State and Covariance).
Finally press the Estimate button to perform the estimation and enter the resulting model into the Model board. The estimated values of the parameters are automatically entered in the 'Value' boxes.
The button 'Clear Initial' clears all the initial guesses, to invoke the special initialization routine.
Note that both these buttons apply to all inputs in the multi-input case.
y = G u + H e
where H is a first order rational filter C/D and e is white noise.
(file idprocest.htm)