Advanced experimental measurements

Besides its modeling and simulation activities, EOMYS can run some multiphysic experimental measurements. These tests can be carried for pre-certification purpose (e.g. check fulfilment of IEC 60034-9 noise limits), or for investigation purpose, for instance to validate some models or improve our understanding of some physical phenomena.

In particuliar, EOMYS can do the following measurements in terms of
-  vibro-acoustics: acceleration, acoustic pressure and power
- electromagnetics: current, voltage, electrical and magnetic field intensity
- heat transfer: temperature, flow rate, fluid speed, static and dynamic pressure

Vibroacoustic post processing include transfer path analysis (OTPA, ATPA), run-ups, order tracking analysis, spectrograms and sonagrams, operational and experimental modal analysis, operational deflection shapes.

EOMYS test equipment includes:

  • a 16-channel Dynamic Signal Analysis acquisition system (SIRIUS) with Dewesoft software
  • three-axis or mono-axis piezoelectric accelerometers (Bruel and Kjaer), including miniature accelerometers
  • voltage and amperemeter clamps (Chauvin et Arnoux)
  • free-field microphones (PCB)
  • electrodynamic shaker (LDS) and impact hammer (DJB)
  • infrared temperature sensor (Optris) and thermocouples

Measuring activities generally include the following steps:
- design of the test campaign
- instrumentation of the system
- field measurements
- off-line post processing and analysis
- technical reporting including recommendations

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