Product
Innovative software for test-based sound & vibration measuring
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.
10 reasons to change your current measurement approach
DIRAC Features
Measurement Data Import (.atfx)
All Data Acquisition Systems are working with DIRAC through ASAM-ODS (.atfx) import of FRF data. Measurement quality calculations and Virtual Point transformations can be done with any Data Acquisition System, e.g. Siemens (LMS), Head Acoustics, Bruel & Kjaer or Müller-BBM systems (also LIVE available).
Rubber Mount Characterization
Traditional methods for Rubber Characterization are expensive to perform and limited in terms of frequency band with and Degrees of Freedom. With DIRAC, a full 6-degree of freedom characterization of the rubber mount dynamics is available within a day using the Virtual Point.
Matrix Measurement Overviews
A measurement can involve over 10.000 individual FRFs (100 channels, 50 points and 2 measurements per point). Our Matrix shows all data in a single overview. Incorrect measurements are directly spotted using view-modes such as consistency functions, amplitude checks and coherence checks.
Multi-Hammer Merge
Connect two (or more!) impact hammers simultaneously and merge the measured data directly! Different impact tips such as rubber or nylon excite different frequency bands. Combine impact hammers to optimize the measurement quality over the whole frequency range.
TEDS Integration
Using the Müller-BBM MKiig2 system, DIRAC directly reads out all sensor information using TEDS. The advanced sensor database within DIRAC allows to quickly prepare measurements and update all information when connecting the Müller-BBM hardware.
Measurement Quality
DIRAC includes checks for outstanding model quality: from the Measurement Preparation with DoF contribution insights, Signal Checks, classical FRF checks (passivity, coherence), up to checks on the resulting Model using the Virtual Point Quality indicators on Reciprocity and Consistency.
Compatibility with Simulation
Measurements performed with DIRAC and the Virtual Point MEthodology are ready for use in Simulation Packages or Dynamic Substructuring applications.
Operational Deflection Shape Visualization
Visually inspect the measurement results using the ODS-viewer. Export results (.gif) to share them in presentations.
Indirect Drive-Point Measurements
6-DoF Drive Point measurements are easily available using Virtual Points: your measured data is transformed for a perfect DrivePoint measurement.
Measurement Transparancy
Clear positioning of all instrumentation, backed up by photo’s which can be included in the project!
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.
- Consistent 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. E.g., 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 free demo or contact us about our orientational tech program to see how DIRAC can help you achieve this.