SYSTEM (Linear)
Charles François (2004). SYSTEM (Linear), International Encyclopedia of Systems and Cybernetics, 2(2): 3376.
| Collection | International Encyclopedia of Systems and Cybernetics |
|---|---|
| Year | 2004 |
|
Vol. (num.) |
2(2) |
| ID | ◀ 3376 ▶ |
| Object type | Methodology or model |
A system which responds to an increase or decrease of some input
by a
change
of the same amount in its corresponding
variable .
Only very simple systems, in fact simple functions , if they may be called systems, can be linear. The real condition of linearity
is that the system be very poorly
joined
in ASHBY's sense, i.e. devoid of significant internal
interactions , constraints
and
feedbacks . No complex system
can be linear more than in a very limited, local and provisional sense.
R. VALLÉE provides a good global overview of dynamic linear systems of differencial nature ( continuous ) or recurrent ( discrete time ) (1992, p.114-26).