Measurement of unsteady vibration using compressed sensing and digital image correlation

Abstract

All objects have vibration modes, which are deformation shapes that tend to vibrate, and measuring them is very useful in structural design/failure diagnosis. In this study, we have achieved low-cost, high-resolution measurement of high-frequency vibration modes by applying image correlation and compressed sensing to images taken by a low-cost, high-resolution, low-speed camera. In the previous paper, we reported the measurement under single-frequency excitation, and in this presentation, we will report the results of the extended measurement to unsteady vibration such as noise excitation.