Real-time vision-based modal parameters estimation at 10000 fps
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説明
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.
収録刊行物
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- SPIE Proceedings
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SPIE Proceedings 8345 83454F-, 2012-04-26
SPIE