Getting Started    

Specifying Operating Conditions

If you have nonlinear components in your Simulink model, the Simulink LTI Viewer automatically linearizes them when you select Get Linearized Model. The Simulink LTI Viewer uses the initial state values you set in the Simulink diagram as default settings for linearization points for the states in the diagram. You also have the option to linearize about the operating conditions of your choice.

If you want your analysis model to be linearized about a zero state, or other state and input operating conditions, you must specify the desired operating points in the Operating Point dialog box before selecting Get Linearized Model.

To open the Operating Point dialog box, select Set Operating Point in the Simulink menu. This figure shows the open Operating Point dialog box.

Figure 3-28: The Operating Point Dialog Box for Changing Linearization Points

To change the default operating point behavior, follow these steps:

  1. Change the radio button selection (under Linearize about:) from the default to either:
  2. Use the fields under Value to specify the operating conditions for each input (and state) listed in the Operating Point window. You do not have to specify the states if you choose the Zero state values radio button.
  3. Once you have selected new operating conditions, click OK. This action opens a new dialog box, which is shown below.

  4. Select Yes to finish the process.

Note the following:


  Bode Plots of Linearized Models Designing Compensators