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Proceedings Paper

Nonlinear structural identification based on H infinity filter algorithm
Author(s): Tadanobu Sato; Kai Qi
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Paper Abstract

Dynamic behaviors of a 1-story and 4-story steel structures subject to multi-dimensional ground motion excitations were experimentally investigated by using a shaking table. Linear and nonlinear structural responses were obtained as observation data for the identification. Dynamics characteristics of the model structures were identified using the adaptive H(infinity ) filter, which was developed for identifying structural systems with non-stationary dynamic characteristics by adding the function of memory fading (forgetting factor) for past observation data to the H(infinity ) filter. Identification results show that the H(infinity ) filtering technique are very efficient for identifying linear and nonlinear structural systems. Especially, the nonlinear behavior of the model can be traced effectively.

Paper Details

Date Published: 4 June 1999
PDF: 12 pages
Proc. SPIE 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures, (4 June 1999); doi: 10.1117/12.350090
Show Author Affiliations
Tadanobu Sato, Kyoto Univ. (Japan)
Kai Qi, Univ. of New South Wales (Japan)


Published in SPIE Proceedings Vol. 3667:
Smart Structures and Materials 1999: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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