CAGE User's Guide

Filling the Table from the Experimental Data

You have an empty table and the experimental data in your session. You can now fill the table with values based on your data.

The data that you have imported is a series of measured values of torque at a selection of different operating points. These operating points do not correspond to the values of the breakpoints that you have specified. The lookup table has a range of engine speed from 500 revs per minute (rpm) to 3500 rpm. The range of the experimental data is far greater.

CAGE extrapolates the values of the experimental data over the range of your table. Then it fills the table by selecting the torque values of the extrapolation at your breakpoints.

To fill the table with values based on the experimental data:

1. To view the Table Filler display, click  in the toolbar in the Data Sets view.

1. This display asks you to specify the table you want to fill and the factor you want to use to fill it.

2. In the lower pane, select New_2D_Table from the Table list. This is the table that you want to fill.
3. Select tqmeas from the Factor list. This is the data that you want to use to fill the table.
4. Select N from the x-axis factor list and L from the y-axis factor list. Your session should be similar to the following display.

   

1. The upper pane displays the breakpoints of your table as crosses and the operating points where there is data as blue dots.

5. To view the table after it is filled, ensure that the Show table history after fill box, at the bottom left, is selected.

1. Data sets display the points in the experimental data, not the values at the breakpoints.

6. To fill the table with values of tqmeas extrapolated over the range of the normalizers, click Fill Table.

1. This opens the History dialog box, shown.

   

7. Click Close to close the History dialog box and return to the Table Filler display.
8. To view the graph of your table, as shown, select Data -> Plot -> Surface.

   

This display shows the table filled with the experimental points overlaid as purple dots.

The table has been calibrated by extrapolating over the values of your data and filling the values that the data predicts at your breakpoints.

Notice that the range of the table is smaller than the range of the data, as the table only has a range from 500 rpm to 3500 rpm.

The data outside the range of the table affects the values that the table is filled with. You can exclude the points outside the range of the table so that only points in the range that you are interested in affect the values in the table.

Importing Experimental Data

Selecting Regions of the Data