National Instruments 370753C-01 Manual De Usuario
Chapter 3
Building System Connections
3-12
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D
0
X0
0
0
State Names
-----------
Input Names
-----------
Input 1
Output Names
------------
Output 1
System is continuous
Algorithm
The system used for the feedback loop,
Sys2
, is optional. If it is not
specified, a default state-space system is used with
NULL
matrices for A
2
,
B
2
, and C
2
and an identity matrix for D
2
so that unity gain feedback is
implemented.
From Figure 3-4 and the state-space definitions of the systems, you derive
the following equations:
the following equations:
x·
1
=
A
1
x
1
Be
1
+
y
1
=
C
1
x
1
D
1
e
1
+
x·
2
=
A
2
x
2
B
2
y
1
+
y
2
=
C
2
x
2
D
2
y
1
+
e
1
=
u
1
y
2
–