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Proceedings Paper

A regularization scheme for displacement reconstruction using acceleration data measured from structures
Author(s): Yun Hwa Hong; Hyun Woo Park; Hae Sung Lee
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Paper Abstract

This paper present a new displacement reconstruction scheme using only acceleration measured from a structure. For a given set of acceleration data, the reconstruction problem is formulated as a boundary value problem in which the acceleration is approximated by the second-order central finite difference of displacement. The displacement is reconstructed by minimizing the least squared errors between measured and approximated acceleration within a finite time interval referred to as a time window. An overlapping time window is introduced to improve the accuracy of the reconstructed displacement. The displacement reconstruction problem becomes ill-posed because the boundary conditions at both ends of each time window are not known a priori. Furthermore, random noise in measured acceleration causes physically inadmissible errors in the reconstructed displacement similar to the conventional time integration schemes. A Tikhonov regularization scheme is adopted to alleviate the ill-posedness. The validity of the proposed method is demonstrated through two laboratory experiments.

Paper Details

Date Published: 8 April 2008
PDF: 11 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 693228 (8 April 2008); doi: 10.1117/12.774478
Show Author Affiliations
Yun Hwa Hong, Seoul National Univ. (South Korea)
Hyun Woo Park, Dong-A Univ. (South Korea)
Hae Sung Lee, Seoul National Univ. (South Korea)

Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

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