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Proceedings Paper

Real-time vision-based modal parameters estimation at 10000 fps
Author(s): Hua Yang; Idaku Ishii; Takeshi Takaki
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Paper 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.

Paper Details

Date Published: 6 April 2012
PDF: 9 pages
Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83454F (6 April 2012); doi: 10.1117/12.917085
Show Author Affiliations
Hua Yang, Hiroshima Univ. (Japan)
Idaku Ishii, Hiroshima Univ. (Japan)
Takeshi Takaki, Hiroshima Univ. (Japan)


Published in SPIE Proceedings Vol. 8345:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012
Masayoshi Tomizuka; Chung-Bang Yun; Jerome P. Lynch, Editor(s)

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