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 2 iX high–speed cameras. For benchmark purposes, accelerometers were simulta-neously 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 integra-tion 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.

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