4.6 Virtual Point Transformation

The virtual Point Transformation card, helps you during the preparation phase of a measurement to verify the quality of the test setup.

In the following video, the quality indicators of the Prepare module of DIRAC are explained.

Virtual Point conditioning

The overall number represents the condition number of the VP-Transformation matrix. It expresses the sensitivity of the VP Transformation to errors in the placement and measurement of the forces or responses. It should thus be as low as possible.

Visualizing the relative conditioning of each VP-DoF

To visualize the relative VP-DoF conditioning, complete the next steps:

1. Click the expansion button .
2. Click the condition number button .

Virtual Point contribution matrix

The Virtual Point contribution matrices show how much each sensor channel and excitation contributes to the description of the DoFs of the selected Virtual Point. This is a visualization of the R-Matrix of the VP setup (more theory here).

To visualize the desired contribution matrix, complete the next steps:

1. Select the correct VP from the drop-down.
2. Click the Response or Reference button.