Set Up Feature and Torque Strategy

The feature calibration process calibrates an algebraic collection of lookup tables, or strategy, by comparing the tables to the model.

In this example, you create a feature and import the strategy from a Simulink® model file. The strategy represents torque as the product of three lookup tables:

  • Speed-load

  • Air-to-fuel ratio (AFR)

  • Spark angle

  1. At the command line, open the CAGE browser.

    cage

  2. To import the strategy, select File > Import > Strategy. Navigate to matlab\toolbox\mbc\mbctraining. Open the torqueFeature model file.

    Model-Based Calibration Toolbox™ imports lookup tables from the Simulink model.

  3. In the MBC Feature Importer dialog box, use the Lookup Table Preview, Feature Details, and Model Reference tabs to review the tables and feature details. Click OK to import the feature.

  4. In CAGE, on the Equation tab, review the Torque_Feature feature parsed from Simulink as the output of the algebraic equation of tables.

    CAGE torque feature equation tab.

  5. To view the strategy, select Feature > Edit Strategy.

    Simulink windows open, displaying the Torque_Feature strategy and the CAGE libraries.

    Close the Simulink windows.

    Simulink model showing the torque feature strategy.

  6. To view a simplified feature expression, clear Feature > Full Strategy Display.

    CAGE full strategy display feature equation tab.

  7. Click the plus next to Torque_Feature to expand the Feature tree and observe the tables created by importing the strategy.

    • T — Speed and load

    • F_A — Air-to-fuel ratio (AFR)

    • F_SPK — Spark angle

    CAGE torque feature table