The Difference between Online Identification and Offline Identification is given in the following table.

S.No.
Online Identification
Offline Identification
1.
Used for
control applications.
Used for
Analysis applications.
2.
Model is
used for controller design.
Model is
used for offline simulation of systems.
3.
Compact and
easy to manipulate model.
Free run
simulation without access to past output measurement.
4.
Output
prediction with little computational burden.
No access to
prediction.
5.
One step
prediction.
No means to
reconstruct.
6.
Correction
at each step.
Model must
be entirely deterministic.
7.
Initial
model need not be very accurate.
Should be
more accurate than online.
8.
Complexity
may be high.

Excercise
Q1. Compare Online and Offline Identification.
Difference between Online Identification and Offline Identification

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