Iddata Source
Import time-domain data stored in iddata
object in
MATLAB workspace
Libraries:
System Identification Toolbox
Description
The Iddata Source block imports the input-output time-domain data
stored in an iddata
object in the MATLAB® workspace. You can use this block to import data for simulating a model in
Simulink®.
Examples
Simulate Nonlinear ARX Model in Simulink
Compare the simulated output of a Nonlinear ARX Model block to the measured output of a system. You improve the agreement between the measured and simulated responses by estimating initial state values.
Ports
Output
Input — Input data stored in iddata
object
scalar | vector
Input data stored in iddata
object, returned as a
scalar for single-input data and a vector of length
Nu for multichannel data with
Nu inputs. If z
is the
iddata
object, the output at this port at
simulation time t is z.InputData
at time t. If t is greater than
z.SamplingInstants(end)
, the maximum time in
z
, the input data is returned as
0
for each input channel.
Data Types: double
Output — Output data stored in iddata
object
scalar | vector
Output data stored in iddata
object, returned as a
scalar for single-output data and as a vector of length
Ny for multichannel data with
Ny outputs. If z
is the
iddata
object, the output at this port at
simulation time t is z.OutputData
at time t. If t is greater than
z.SamplingInstants(end)
, the maximum time in
z
, the output data is returned as
0
for each output channel.
Data Types: double
Parameters
IDDATA object — Time-domain data to be imported
iddata(1,1)
(default) | iddata
object
Time-domain data that is to be imported, specified as an
iddata
object that you have created in the
MATLAB workspace. The iddata
object must contain
only one experiment. For a multiple-experiment iddata
object z
, to specify an iddata
object
for experiment number kexp
, specify IDDATA
object as getexp(z,kexp)
.
Start time — Start time for signals in iddata
object
-1
(default) | non-negative real scalar
Start time for signals in the iddata
object, specified
as -1
or a non-negative real scalar. The default value of
-1
means that this start time matches that of the
Simulink model. To specify the start time of the signals to be the same as
that of the iddata
object, set the Start
time to data.Tstart
, where
data
is the iddata
object.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.
Version History
Introduced in R2008a
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