Calibrating the Feature Node

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How to Calibrate the Feature Initializing the Feature Feature View Feature Menu

How to Calibrate the Feature

Selecting a Feature node displays the Feature view. For more information about the Feature view, see Feature View.

The Feature view enables you to calibrate the entire feature, that is, fill all the table values by referring to a model.

To calibrate the feature, either click the buttons on the toolbar, , or select from the following options on the Feature menu described in the following sections: Initializing the Feature and Feature Fill Wizard.

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Initializing the Feature

For example, a simple feature for maximum brake torque (MBT) consists of the following tables:

• A speed (N), load (L) table

• A table to account for the behavior of air/fuel ratio (A)

Initializing this feature sets the values of the normalizers for speed, load, and AFR over the range of each variable and put specified values into each cell of the two tables.

A table that is already initialized provides a useful starting point for a more detailed calibration.

To initialize the feature, perform the following steps:

1. Click . This opens the Feature Initialization Options dialog box, as shown.

   

2. Enter the ranges for the breakpoints in your normalizers. In the preceding example, these are the breakpoint ranges:

   • L has range 0.2 0.811.

   • N has range 750 6500.

   • A has range 11 17.6.

3. Enter the initial table value for each cell in each table. Above, the cell values are

   • Table_NL has initial value 0.

   • Fn_A has initial value 0.

4. Click OK to initialize the feature.

   Note   The default values in this dialog box are taken from the variable dictionary. If you clear any Enable box, the associated table or normalizer is left unchanged.

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Feature View

As you select a Feature node you see the Feature view, shown. This section describes the Feature view and the Feature menu options.

The parts of the Feature view include

1. The strategy for the selected feature. This is the algebraic collection of the tables that you are using to calibrate the selected feature.

2. The model associated with the selected feature.

3. The Feature History pane, which displays the history of the feature.

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Feature Menu

The Feature menu has the following options:

• Select Model

  Use this to select the correct model for your feature.

• Deselect Model

  Use this to clear the current model from your feature.

• Convert to Model

  Takes the current feature and converts it to a model, which you can view by clicking the Model button.

• Graphical Strategy Editor

  Opens your current strategy for editing. For more information, see Setting Up Your Strategy.

• Parse Strategy Diagram

  Performs the same function as double-clicking the blue outport of your strategy diagram. For more information, see Setting Up Your Strategy.

• Clear Strategy

  Clears the current strategy from your feature.

• Initialize

  Initializes the feature; also in the toolbar. See Initializing the Feature for details.

• Fill

  Fills and optimizes the feature; also in the toolbar. See Feature Fill Wizard for details.

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Calibrating the Tables

Feature Fill Wizard

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