User`s guide

Identifying Low-Order Transfer Functions (Process M odels)
• status field specifies whether to estimate the parameter, or keep the initial
value fixed (do not estimate), or set the value to zero. This field can have
the values
'estimate', 'fixed',or'zero'. F or more information, see
“Options for Initial States” on page 3 -3 9.
•
min specifies the minimum bound on the parameter.
•
max specifies the maximum bound on the parameter.
•
value specifies the numerical value of the parameter, if known.
To set the value of
K to 12 and keep it fixed, use the following commands:
mod.K.value=12;
mod.K.status='fixed';
Note mod is defined for one input. This model is automatically adjusted
to have a duplicate for each input.
To estimate Tp1 an d Td only, use the following command:
mod_proc=pem(ze,mod)
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