User`s guide

2 LTI Models
2-28
Model-Specific Properties
The remaining LTI properties are specific to one of the four model types (TF,
ZPK, SS, or FRD). For single LTI models, these are summarized in the
followingfourtables.ThepropertyvaluesdifferforLTIarrays.S ee
set onpage
11-193 for more information on these values.
Table 2-5: TF-Specific Properties
Property Name Description Property Value
den
Denominator(s) Real cell array of row vectors
num
Numerator(s) Real cell array of row vectors
Variable
Transfer functi on
variable
String 's', 'p', 'z', 'q',or
'z^–1'
Table 2-6: ZPK-Specific Properties
Property Name Description Property Value
k
Gains Two-dimensional real matrix
p
Poles Cell array of column vectors
Variable
Transfer function
variable
String 's', 'p', 'z', 'q',or
'z^–1'
z
Zeros C ell array of co lu mn vectors
Table 2-7: SS-Specific Properties
Property Name Description Property Value
a
State matrix 2-D real matrix
b
Input-to-state matrix 2-D real matrix
c
State-to-output matrix 2-D real matrix
d
Feedthrough matrix 2-D real matrix
A
B
C
D