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TECHNICAL PAPERS

Output-Only Subspace-Based Structural Identification: From Theory to Industrial Testing Practice

[+] Author and Article Information
Michèle Basseville

CNRSe-mail: basseville@irisa.fr

Albert Benveniste

Inria   Irisa, Campus de Beaulieu, 35042 Rennes Cedex, France

Maurice Goursat

Inria, BP 105, 78153 Le Chesnay Cedex, France

Luc Hermans

LM S International, Researchpark Haasrode Z1, Interleuvenlaan 68, 3001 Leuven, Belgium

Laurent Mevel

Irisa; Inria

Herman Van der Auweraer

LMS International

J. Dyn. Sys., Meas., Control 123(4), 668-676 (Feb 07, 2001) (9 pages) doi:10.1115/1.1410919 History: Received February 07, 2001
Copyright © 2001 by ASME
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References

Figures

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Ariane V launcher-the main components
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Ariane V launcher-time/frequency analysis of a signal measured at the bottom of a fuel tank in the EPS stage in the longitudinal direction. Abscissa: time, ordinate: frequency.
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Ariane V launcher-stabilization diagram for the suspension modes of the fuel tanks in the EPS stage (data segment S1). Abscissa: frequencies, ordinate: increasing SVD truncation order. The symbols contain information on the convergence of damping ratios and of modal vector values. Results from the LMS CADA-X IN-OP module.
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Ariane V launcher-relative change in the natural frequency of a mode for data segments S1, S2, S3 and S4
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Helicopter-a typical stabilization diagram (sampling frequency 100 Hz and p=64). Abscissa: frequencies, ordinate: increasing SVD truncation order. The symbols contain information on the convergence of damping ratios and of modal vector values. Results from the LMS CADA-X IN-OP module.
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Helicopter-natural frequency (upper) and damping ratio (lower) of mode at 6.4 Hz as a function of the SVD truncation order, for three different numbers of block-rows. Abscissa: frequency (upper) and damping ratio (lower), ordinate: increasing SVD truncation order.
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Helicopter-Modeshape at 16.41 Hz
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Meaning of the symbols in Figs. 9 and 10
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Z24 Bridge-classical subspace identification: second record (2 sensors). Abscissa: increasing SVD truncation order, ordinate: frequencies. The symbols, explained in Fig. 8, stand for different damping ratios. Results from the INRIA Scilab modal analysis module.
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Z24 Bridge-polyreference subspace identification with the two records. Abscissa: increasing SVD truncation order, ordinate: frequencies. The symbols, explained in Fig. 8, stand for different damping ratios. Results from the INRIA Scilab modal analysis module.

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