Wavelet-Hybrid Feedback Linear Mean Squared Algorithm for Robust Control of Cable-Stayed Bridges
Publication: Journal of Bridge Engineering
Volume 10, Issue 2
Abstract
Cable-stayed bridges are flexible structures, and control of their vibrations is an important consideration and a challenging problem. In this paper, the wavelet-hybrid feedback least mean squared algorithm recently developed by the writers is used for vibration control of cable-stayed bridges under various seismic excitations. The effectiveness of the algorithm is investigated through numerical simulation using a benchmark control problem created based on an actual semifan-type cable-stayed bridge design. The performance of the algorithm is compared with that of a sample linear quadratic Gaussian (LQG) controller using three different earthquake records: the El Centro (California, 1940), Mexico City (Mexico, 1985), and Gebze (Turkey, 1999) earthquakes. Simulation results demonstrate that the new algorithm is consistently more effective than the sample LQG controller for all three earthquake records. Additional numerical simulations are performed to evaluate the sensitivity of the new control algorithm. It is concluded that the algorithm is robust against the uncertainties existing in modeling structures.
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Acknowledgment
This article is based on research partially sponsored by National Science Foundation grants CMS-0350116 and CMS-0353627.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 10 • Issue 2 • March 2005
Pages: 116 - 123
Copyright
© ASCE.
History
Received: Mar 31, 2003
Accepted: Mar 29, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
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