UT pre-processing in parametric study

The “Computation options” tab of the “Variation” panel in the model of a parametric study includes a list of pre-processing options. The most common are:

• Force compute the delay law
• Force compute TCG (calibration)

 

 

For each variation included in the parametric study, a pre-processing allows you to automate the calculation of a setting that must be carried out manually in the CIVA model. Typically, this can be the calculation of the delay laws for a phased-array transducer or even a TCG calibration from the “Simulated TCG” tool.

By default, no pre-processing is enabled. This means, for example, that the laws calculated in the model will be applied as they are to each variation/calculation of the parametric study. It is necessary to activate pre-processing in order to update the settings (for example the delay laws) for each new variation. The same process is considered for automatic TCG calibrations.

Whether to activate pre-processing or not depends on the objective of the study.

 

Example

We consider a phased-array transducer whose laws have been calculated from a reference material. The properties of this material are defined as variable parameters.

Two scenarios are then possible:

• The first consists in evaluating the impact of the change of material by considering the initial phased-array setting. In this case, it is not necessary to activate the recalculation of the delay laws.
• On the other hand, if the objective is to readjust the laws for each new material considered in the parametric study, the option must be checked (e.g., to maintain a constant deviation angle).

Thus, when defining the CIVA model, it is important to check if variable parameters can have an impact on the settings, and whether it seems necessary to force the recalculation of these settings according to the objective of the study.