Variable-gain control applied to aerodynamic control of bridge deck flutter

A method of suppressing flutter of a very long span bridge is presented in this paper. The control system consists of actively controlled surfaces which by torsional movement generate stabilizing aerodynamic forces. The unsteady aerodynamic forces, acting on the bridge deck, are approximated by the...

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Bibliographic Details
Published inProceedings of 35th IEEE Conference on Decision and Control Vol. 1; pp. 682 - 687 vol.1
Main Authors Wilde, K., Fujino, Y.
Format Conference Proceeding
LanguageEnglish
Japanese
Published IEEE 24.12.2002
Subjects
Aerodynamics
Bridges
Control systems
Function approximation
Laplace equations
Motion control
Optimal control
Output feedback
Structural beams
Wind speed
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ISBN9780780335905
0780335902
ISSN0191-2216
DOI10.1109/CDC.1996.574429

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Summary:A method of suppressing flutter of a very long span bridge is presented in this paper. The control system consists of actively controlled surfaces which by torsional movement generate stabilizing aerodynamic forces. The unsteady aerodynamic forces, acting on the bridge deck, are approximated by the rational function approximation and the frequency independent equation of motion is derived. The dependence of the system on mean wind speed limits the efficiency of application of the conventional constant gain optimal feedback control. The improvement in control effectiveness is obtained by proposed variable-gain concept. The output variable-gain approach is formulated in terms of mathematical optimization problem and necessary conditions are derived.
ISBN:9780780335905
0780335902
ISSN:0191-2216
DOI:10.1109/CDC.1996.574429