Innovative software for test-based sound & vibration measuring

DIRAC completely changes the way you measure and model sound & vibrations. DIRAC allows engineers to couple measured FRFs with simulated FRF – with Virtual Point transformation, making reliable full-vehicle models available earlier in the development process.
DIRAC ensures traceability of results and indicates the quality of the measurement. Overall, DIRAC helps to avoid the final-phase troubleshooting – which can postpone vehicle production – and reduces the number of prototype variants needed – thus saving valuable time and resources.

DIRAC is the first software of its kind that enables engineers to build accurate FRF models from measurements. DIRAC ensures traceability of results and indicates the quality of the measurement. 

Limit the need to re-do measurements or to troubleshoot issues with emergency teams. In the early stages of vehicle R&D, full vehicle sound & vibration performance can already be estimated by combining measured and simulated FRFs. Over time these predictions can be updated to reflect changes in the design or decisions that have been made.

DIRAC highlights

  • High-quality FRF models, created through an intuitive workflow with clear indication of the model’s quality.
  • Seamless use of Virtual Points, allowing for a new level of compatibility with 6 DoF, compatible with Finite Element simulation.
  • Based on Open Standards, so the model can be used for further analysis in standard measurement and simulation packages or MATLAB.

The unique DIRAC software

DIRAC is unique on many fronts, but truly outstanding are the intuitive way of guiding engineers during the measurement and the integration of the Virtual Point methodology. With the live quality indicators available in DIRAC, measurements will be done first-time-right. The measurement flexibility DIRAC offers has never been implemented before. The Virtual Point transformation allows engineers to couple measured FRFs with simulated FRFs & to make reliable full-vehicle models available earlier in the development process.

CAD based preparation

DIRAC uses CAD files and an intuitive 3D environment as a basis for the measurement preparation. Sensors and force locations are all prepared in 3D, which give immediate visual feedback to the user and later allows for visualization of results. With DIRAC, the engineer can adjust all possible measurement settings even after testing.

Measurement data quality

The measurement data quality is continuously controlled on multiple levels:

  • Smart data and sensor checks ensure the measured data streams on the lowest level have no flaws, such as overloads, low signal-to-noise or double pulses.
  • Consistency calculations ensure the measured data is in physical accordance with the known location and the orientation information as used in the Virtual Point Transformation. Wrongly mounted sensors, swapped cables and off-position impacts are detected this way.
  • Overall measurement quality is checked against the resulting FRF model. For example, the VP Transformation allows you to check reciprocity and drive point passivity, giving valuable feedback to the engineer. Therefore, it is identified whether an interface is well described or if more measurements are required.
What’s next?

Do you want to increase the quality and speed of your sound & vibration design process? Request a DEMO or contact us to see how DIRAC can help you achieve this.