In the wind tunnel testing, structural deformation and motion should be measured using non-contact and precisely calibrated techniques. We designed, developed, and set up a novel DIC method for testing large and lightweight structures in wind tunnel. With the use of a universal mount mechanism and optical advancements for far-field structural evaluations, we increased the functionality of our current in-house stereo DIC system. The pitch and azimuth rotations of cameras are taken into consideration during the calibration of the WT-DIC system utilizing the Euler rotation theorem. Case studies for the developed DIC system include a small MAV flapping wing and a large deployable parachute.

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Vivek Khare, Sudhir Kamle, and Kawai Kwok, "DIC system with Euler transformation for structural measurements in wind tunnel," Proc. SPIE 12486, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023, 124861G (Presented at SPIE Smart Structures + Nondestructive Evaluation: March 16, 2023; Published: 18 April 2023); https://doi.org/10.1117/12.2658755.