User`s guide

11 Using System Identification Toolbox™ Blocks
Simulating Model Output
In this section...
“When to Use Simulation Blocks” on page 11-6
“Summary of Simulation Blocks” on page 11-6
“Specifying Initial Conditions for Simulation” on page 11-7
When to Use Simulation B locks
Add model simulation blocks to your Simulink model from the System
Identification Toolbox block library when you want to:
• Represent the dynamics of a physical component in a Simulink m odel using
a data-based nonlinear model.
• Replace a complex Simulink subsystem with a simpler data-based
nonlinear model.
You use the model simulation blocks to import the models you identified using
System Identification Toolbox software from the MATLAB workspace into the
Simulink environment. For a list of System Ide nti fication Toolbox simulation
blocks, see “Summary of Simulation Blocks” on page 11-6.
Summary of Simulation Blocks
The following table summarizes the blocks you use to import models from
the MAT L A B environment into a Simu link model fo r simulation. Importing
a model corresponds to entering the model variable name in the block
parameter dialo g box.
Block
Descriptio
n
IDMODEL M odel Simulate idmodel model in Simulink, including
low-ordertransferfunction(
idproc), linear
polynomial (
idpoly), state-space (idss), and
grey-box (
idgrey) models. Also simulates idarx
model objects.
IDNLARX Model Simulate idnlarx mo del in S imulink.
11-6