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Structural Engineering and Mechanics Volume 19, Number 1, January10 2005 , pages 107-121 DOI: https://doi.org/10.12989/sem.2005.19.1.107 |
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Suboptimal control strategy in structural control implementation |
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J. Y. Xu, Q. S. Li, G. Q. Li, J. R. Wu and J. Tang
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| Abstract | ||
| The suboptimal control rule is introduced in structural control implementation as an alternative over the optimal control because the optimal control may require large amount of processing time when applied to complex structural control problems. It is well known that any time delay in structural control implementation will cause un-synchronized application of the control forces, which not only reduce the effectiveness of an active control system, but also cause instability of the control system. The effect of time delay on the displacement and acceleration responses of building structures is studied when the suboptimal control rule is adopted. Two examples are given to show the effectiveness of the suboptimal control rule. It is shown through the examples that the present method is easy in implementation and high in efficiency and it can significantly reduce the time delay in structural control implementation without significant loss of performance. | ||
| Key Words | ||
| suboptimal control; optimization; structural control; time delay; vibration; earthquake simulation. | ||
| Address | ||
| J. Y. Xu; Department of Civil Engineering, Wuhan University of Technology, Wuhan 430070, P.R. China Q. S. Li; Department of Building and Construction, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong G. Q. Li; Department of Civil Engineering, Wuhan University of Technology, Wuhan 430070, P.R. China (School of Engineering and Science, Swinburne University of Technology, John Street, Howthorn, Victoria 3122, Australia) J. R. Wu and J. Tang; Department of Building and Construction, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong | ||