1. ONERA
  2. Souffleries
  3. Testing techniques
  4. Model deformation measurements

Model Deformation Measurements

MDM setup - here in F1 test section

 

The real-time model deformation measurement (MDM) and positioning is important information during wind tunnel tests.

The model is equipped with adhesive markers, essentially on its wings.

The calibration phase of the MDM system used a reference test pattern. It is possible to define all the calibration parameters of the two cameras: relative position, viewing angles, focus and distortions.

Using the method of processing based on epipolar geometry (the application of projective geometry techniques), the three marker coordinates were deduced from any image pair.

This technique is available in F1, S1MA and S2MA in industrial conditions.

Markers applied to the wing model
  
MDM - Typical results
MDM - Typical results

We also have MDM capability on rotating blades.

MDM on rotating blade

MDM technique applied on rotating blade