VARIABLE (Command)
Charles François (2004). VARIABLE (Command), International Encyclopedia of Systems and Cybernetics, 2(2): 3713.
| Collection | International Encyclopedia of Systems and Cybernetics |
|---|---|
| Year | 2004 |
| Vol. (num.) | 2(2) |
| ID | ◀ 3713 ▶ |
| Object type | Methodology or model |
- “An internal variable of a system which is under the control of a decider subsystem” (B. WALLISER, 1977, p.129).
WALLISER distinguishes two classes of command variables:
Control variable: A command variable with continuous effect in time. This is practically equivalent to a regulator.
Decision variable: A command variable operating discontinuously in time. This type corresponds to more or less frequent direct interventions of the decider, who may for example modify the calibration of a regulator.