Real-time vision-based modal parameters estimation at 10000 fps

Hua Yang; Idaku Ishii; Takeshi Takaki

doi:10.1117/12.917085

6 April 2012 Real-time vision-based modal parameters estimation at 10000 fps

Hua Yang, Idaku Ishii, Takeshi Takaki

Proceedings Volume 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012; 83454F (2012) https://doi.org/10.1117/12.917085
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

In this study, we introduce a real-time vision-based modal parameters estimation system, in which a high-speed vision system operates in real time at 10000 fps for noncontact structural dynamics estimation. The high-speed vision system can extract the displacements of 100 points on a vibrating cantilever beam in 96 × 512 images at 10000 fps by implementing a column-moment calculation circuit logic on a field-programmable logic array. Based on these vibration displacements, the modal parameters of the cantilever beam are simultaneously determined by using an improved output-only modal parameters estimation algorithm. To demonstrate the performance of our 10000-fps vision-based modal parameters estimation system, the resonant frequencies and mode shapes of vibrating steel cantilever beams with artificial damage were estimated in real time.

Citation Download Citation

Hua Yang, Idaku Ishii, and Takeshi Takaki "Real-time vision-based modal parameters estimation at 10000 fps", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83454F (6 April 2012); https://doi.org/10.1117/12.917085

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