Overview
This section describes how to specify operating points for a
model using functions in the MATLAB command window. Use the functions
when you want to create M-files to automate the linearization process,
or when you want to use an operating point to initialize a Simulink model.
For a description of how to use the graphical interface for this task,
see Operating Point Analysis Using the GUI.
Before linearizing the model, you must choose an operating point
to linearize the system about. This is often a steady-state value.
Refer to Why Are Operating Points Important? for more information
on the role of operating points in linearization.
Use the Simulink Control Design functions for any of the
following methods of specifying the operating point:
You do not know all the input and state values, but
you can characterize the operating point indirectly by specifying
operating point values and constraints for specific signals and variables
in the model (implicit specification).
You know the operating point explicitly, i.e., you
know the values of all inputs and states in the model.
You want to simulate the model and extract the operating
point at a given time.
Note
The operating point consists of values for all the
states in the model although only those states between the linearization
points will be linearized. This is because the whole model contributes
to the operating point values of the states/inputs/outputs of the
portion of the model you are linearizing. |
 | Operating Point Analysis Using the Command Line | | Example: Water-Tank System |  |
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