Non-contact measurement of the modal shape of a wing using DIC

The modal shape of a wing (aircraft model) is measured using the high-resolution Q400 DIC system. The aircraft model is excited at its natural frequency using an electrodynamic shaker. The Q400 system measures the areal 3D deformation with high accuracy and spatial resolution, from which the natural frequencies and modal shapes can be automatically calculated.
The video shows the wing displacement as an 100x upscaled grid overlay and the measurement displacement of the wing tip versus time.