Model Browser User's Guide

Applying Constraints

In many cases designs might not coincide with the operating region of the system to be tested. For example, an automobile engine normally does not operate in a region of low speed (n) and high exhaust gas recirculation (EGR). You cannot run 15% EGR at 1000 RPM. There is no point selecting design points in impractical regions, so you can constrain the candidate set for test point generation.

Designs can have any number of geometric constraints placed upon them. Each constraint can be one of four types: an ellipsoid, a hyperplane, a 1-D lookup table, or a 2-D lookup table.

To add a constraint to a design:

1. Select Edit -> Constraints from the Design Editor menus.
2. The Constraints Manager dialog appears.

   

The example shows the Constraints Manager dialog with two constraints. Here you can add new constraints, and delete, edit, or duplicate existing constraints. If there are no constraints yet, the Constraints Manager is empty and you can only click Add to construct a new constraint.

3. Click Add.
4. The Constraint Editor dialog with available constraints appears. You can select Linear, Ellipsoid, 1-D Table, or 2-D Table from the Constraint Type drop-down menu, as shown.

   

Saving and Importing Designs

Constraint Types