ERROR
Charles François (2004). ERROR, International Encyclopedia of Systems and Cybernetics, 2(1): 1166.
| Collection | International Encyclopedia of Systems and Cybernetics |
|---|---|
| Year | 2004 |
| Vol. (num.) | 2(1) |
| ID | ◀ 1166 ▶ |
| Object type | Methodology or model |
In a regulator, the difference between the real and the desired (reference) input.
The error is measured in an iterative way by the comparator and its value sent to the controller in order to produce the needed correction.
As the correcting process suffers necessarily a certain time lag, the error may never disappears totally and the regulating process turns iterative and continuously produces oscillations within some more or less wide limits of amplitude.
If the error changes from positive to negative — or the reverse — during the corrective process, the correction may well amplify the error instead of damping it.