28 August 2023
21 August 2023
A change of EMA settings will now be recognized as a change in the project and the user will be asked to save the project on close.
9 August 2023
Complex modes in EMA
It is now possible to select between Normal (real) modes or Complex Modes in the settings of EMA. When Complex Modes is selected, a new column is added in the Modes list which shows the Modal Phase Collinearity (MPC) of complex-valued modes in percentage, or n/a for normal (real) modes.
Exporting is generalized and dependent on the selected mode model type in the Settings panel:
DIRAC EMA now has the option to apply a drive point strategy to obtain normalized mode shapes and residues that contain all input (impact-reference channels) and output (sensor-channels) DoFs. There are two options: single-point and a VP-based drive point strategy. The normalization works with both real and complex modes, and works with both single-mode models and residue models. The obtained results can be exported to Matlab as part of the EMA models already present for exporting.
DIRAC EMA now contains a new card holding a Nyquist diagram. This Nyquist diagram showcases the original FRF and the FRFs resulting from the latest Modal Analysis executed. The graph can be controlled through a frequency overview slider which contains a CMIF of each FRF in the Nyquist graph.
Plotting poles against damping in the stabilization diagram
It is now possible to plot poles against damping in the stabilization diagram. This is achieved by right-clicking on the stabilization diagram and selecting Plot poles against.
Improved pole selection
DIRAC now makes a more accurate pole selection. These poles are grouped based on similarity in frequency and from within this group the best pole is automatically selected. This selection is based on absolute frequency and relative damping tolerance (these are automatically determined unless provided). Each selection is group-based ie: A new selected pole deselects any other selected pole within this group.
Editable modal parameters
Frequency and damping values of a mode can now be edited in the modes card.
Added key interactions
It is now possible to specify different window settings for each excitation source.
Sensor database update
It is now possible to add multiple channels to a sensor as well as define the measurement axis, quantity and calibration for each channel.
Contact us for more VIBES
Contact our support team or call us on +31 85 744 09 70
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