4 February 2022
20 December 2021
This version of DIRAC brings the following 3 main features. A video showing all the new functionalities can be found here.
Matrix post-processing options in Analyze
Matrix post-processing options have been added to the Analyze module. These options serve to perform additional calculations on the selected subset of the FRF matrix, specified as matrix presets. The options apply to so-called Custom Matrix Presets, as can be defined using the controls in the top-left corner. Options are available for:
The panel to the right shows the effective post-processing steps to clarify what is processed, and which quantities are resulted as channels (rows) and reference channels (columns). The processing steps are applied to the FRF subset specified by the channel and reference channel selection for this particular matrix preset.
The post-processing options serve various purposes. A typical use case with direct engineering value is the calculation of Dynamic Stiffness of the Virtual Point transformed FRF Matrix. This can for instance be used for (rubber) mount characterization: the cross-diagonal reveals the dynamic stiffness in all 6 translational and rotational directions. It is further recommended to activate the Reciprocity matrix quality type in this case to assess the quality of the results.
As this type of post-processing is a common choice, a direct preset VP Dynamic Stiffness has been made available under the matrix preset dropdown menu. This preset will always apply to the Virtual Point FRF Matrix.
Undo and redo functionality in Prepare
Actions in the Prepare module can now be reversed and/or redone. When working on a design of experiment, actions such as positioning the sensors, aligning the Virtual Points or setting the impacts can be undone and redone in a user-friendly manner. Undo and redo actions are available in the renewed title bar as two buttons; the on-hover tooltip reveals the action that can be undone/redone. One may also use the key commands CTRL-Z and CTRL-Y.
The Undo/redo features include the following:
Improved UFF export
The option to export FRF matrices in UFF format has been extended. This feature works in a similar manner to the other exporters in DIRAC. Any sensor names that are longer than 10 characters will have their names shortened using the following logic:
Multiple objects can be moved as a group. If the selection contains impacts or mountable sensors, only XYZ translations are allowed.
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