1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
.TH abcd 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
abcd - state-space matrices
.SH CALLING SEQUENCE
.nf
[A,B,C,D]=abcd(sl)
.fi
.SH PARAMETERS
.TP 8
sl
: linear system (\fVsyslin\fR list) in state-space or transfer form
.TP
A,B,C,D
: real matrices of appropriate dimensions
.SH DESCRIPTION
returns the \fVA,B,C,D \fR matrices from a linear system \fVSl\fR.
.LP
Utility function. For transfer matrices \fVSl\fR is converted
into state-space form by \fVtf2ss\fR.
.LP
The matrices \fVA,B,C,D\fR are the elements \fV2\fR to \fV5\fR of
the \fVsyslin\fR list \fVSl\fR, i.e. \fV[A,B,C,D] = Sl(2:5)\fR .
.SH EXAMPLE
.nf
A=diag([1,2,3]);B=[1;1;1];C=[2,2,2];
sys=syslin('c',A,B,C);
sys("A")
sys("C")
[A1,B1,C1,D1]=abcd(sys);
A1
systf=ss2tf(sys);
[a,b,c,d]=abcd(systf)
spec(a)
c*b-C*B
c*a*b-C*A*B
.fi
.SH SEE ALSO
syslin, ssrand
|
