Slides - Automatica - Università degli Studi di Padova

Sistemi e ...
“Il tutto è maggiore della somma delle parti" (Aristotele)
Sistema:
Un sistema può essere definito come l’unità fisica e funzionale, costituita
da più parti (tessuti, organi od elementi 2.3. MODELING ecc.) METHODOLOGY interagenti (od in relazione 45
funzionale) tra loro (e con altri sistemi), formando un tutt’uno in cui,
Generator
symbol
Bus Bus
Transformer
coding symbol
ogni parte, dà un contributo per una finalità comune symbol od un target
1
2
Tie line
connecting with
identificativo di quel sistema.
neighbor system
–150
NRI NRI-P
0° glnAp2 0° glnG
3
4
(Wikipedia - Line http://it.wikipedia.org)
symbol
2.3. MODELING METHODOLOGY 45
1
3
5
Bus
coding
Bus
symbol
4
(a) Power electronics
L
Generator
symbol
Transformer
symbol
2
Tie line
connecting with
neighbor system
6
Line symbol
Load symbol
LC
D
–150
NRI NRI-P
0° glnAp2 0° glnG
glnKp lacl
(b) Cell biology
Lacl
(ready to
send) t1 (buffer
in use)
p1 p3 (output) p2 (input) (ready to
receive)
LC
5
(a) Power electronics
V
L
AC
AT
(c) Process control
6
Load symbol
LC
AC
AT
D
B
glnKp lacl
(b) Cell biology
Lacl
(ready to
send) t1 (buffer
in use)
p1 p3 (output) p2 (input) (ready to
receive)
t5 p4 p5 t6 (produce)
(waiting
for ack.)
(ack.
received)
p7 (consume)
(received)
(send
t3 ack.)
p8 p6 t4 (receive
ack.)
(buffer
in use)
(ack. sent)
Process A Process B
(d) Networking
Figure 2.11: Schematic diagrams for different disciplines. Each diagram is used to illustrate
the dynamics of a feedback system: (a) electrical schematics for a power system [Kun93], (b)
a biological circuit diagram for a synthetic clock circuit [ASMN03], (c) a process diagram for
a distillation column [SEM04] and (d) a Petri net description of a communication protocol.