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Vibration Analysis: High-Speed Stereo DIC on a Helicopter Blade

Case Description
A helicopter blade was vibrated by a shaker with a sine sweep signal and imaged via two iX Cameras next generation i-SPEED® 727 ultra high-speed video cameras. For benchmark purposes, accelerometers were simultaneously attached and Simcenter SCADAS system was invoked to impose perfect synchronization between the accelerometers and the recorded images. 

An optimized DIC analysis was obtained using MatchID Stereo Correlation. Frequency response functions (FRF) could then seamlessly be extracted via a direct integration between Simcenter Testlab and MatchID. Finally, the corresponding operational deflection shapes were determined. An excellent agreement between traditional sensor data and DIC results could be retrieved.


Cameras: 2 iX Cameras i-SPEED 727, 8,512 fps @ 2072 x 1536 resolution

 Validation: Accelerometers & Simcenter SCADAS

Acquisition Speed: 1,600 Hz 



Type: Stereo DIC with optimized settings 

Vibration: Modal parameters identified with Simcenter Polymax 

Mode Shapes: Deflection shape determination with MatchID ODS Module 



Stereo DIC: Time resolved displacements results 

Natural frequencies: structural resonances & damping 

Operational Deflection Shapes: 3D deformation at the identified natural frequencies

Learn more about 3D-DIC solutions & high-speed imaging:

Contact a Hadland Imaging representative to learn more and visit our page on DIC Solutions (digital image correlation) for more information about testing machines, high-speed cameras & everything you need to get the job done right.


Keywords: MatchID, iX Cameras, i-SPEED 727, Siemens, high-speed vibration analysis, DIC, high-speed imaging


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