User`s guide

LTI Properties
1-7
LTI Properties
Inadditiontothemodeldata,theTF,ZPK,FRD,andSSobjectscanstoreextra
information, such as the system sample time, time delays, and input or output
names. The various pieces of information that can be attached to an LTI object
are called the LTI properties. For information on LTI properties, t ype
ltiprops
See also “LTI Properties” on page 2-26 and “Time Delays” on page 2-45.
Use
set to list all LTI properties and their assignable values, and get to
display the current properties of the system. For example, type
sys = ss(–1,1,1,0,0.5) ;% 1/(z+1), sample time = 0.5 sec
set(sys)
a: Nx-by-Nx matrix (Nx = no. of states)
b: Nx-by-Nu matrix (Nu = no. of inputs)
c: Ny-by-Nx matrix (Ny = no. of outputs)
d: Ny-by-Nu matrix
e: Nx-by-Nx matrix (or empty)
StateName: Nx-by-1 cell array of strings
Ts: scalar
InputDelay: Nu-by-1 vector
OutputDelay: Ny-by-1 vector
ioDelayMatrix: Ny-by-Nu array (I/O delays)
InputName: Nu-by-1 cell array of strings
OutputName: Ny-by-1 cell array of strings
InputGroup: M-by-2 cell array if M input groups
OutputGroup: P-by-2 cell array if P output groups
Notes: array or cell array of strings
UserData: arbitrary