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Keywords: magnetorheological damper, parameter identification, Bouc-Wen model, semi-active control, black box, benchmark building.

Summary

Magnetorheological (MR) dampers have received special attention as semi-active devices for mitigation of structural vibrations [1]. Because of the inherent nonlinearity of these devices, it is difficult to obtain a reasonable mathematical inverse model. This paper is concerned with two related concepts. On one hand, it presents a new inverse model of MR dampers based on the normalized Bouc-Wen model. On the other hand, it considers a hybrid seismic control system for building structures, which combines a class of passive nonlinear base isolator with a semi-active control system. In this application, the MR damper is used as a semi-active device in which the voltage is updated by a feedback control loop. The management of MR dampers is performed in a hierarchical way according to the desired control force, the actual force of the dampers and its capacity to react. The control is applied to a numerical three-dimensional benchmark problem which is used by the structural control community as a state-of-the-art model for numerical experiments of seismic control attenuation [2]. The performance indices show that the proposed semi-active controller behaves satisfactorily.

References

1: S.J. Dyke, B.F. Spencer Jr., M.K. Sain, J.D. Carlson, "Modeling and control of magnetorheological dampers for seismic response reduction", Smart Materials and Structures, 5(5), 565-575, 1996. doi:10.1088/0964-1726/5/5/006
2: S. Narasimhan, S. Nagarajaiah, E.A. Johnson, H.P. Gavin, "Smart base-isolated benchmark building. Part I: Problem definition", Structural Control and Health Monitoring, 13(2-3), 573-588, 2006. doi:10.1002/stc.99

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 91 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros Paper 160 Semi-Active Control of Base-Isolated Structures using a new Inverse Model of Magnetorheological Dampers A. Bahar¹, F. Pozo², L. Acho², J. Rodellar¹ and A. Barbat³ ¹CoDAlab, ETSECCPB, ²CoDAlab, EUETIB, ³CIMNE, ETSECCPB, Universitat Politècnica de Catalunya, Spain doi:10.4203/ccp.91.160 purchase the full-text of this paper Full Bibliographic Reference for this paper A. Bahar, F. Pozo, L. Acho, J. Rodellar, A. Barbat, "Semi-Active Control of Base-Isolated Structures using a new Inverse Model of Magnetorheological Dampers", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 160, 2009. doi:10.4203/ccp.91.160 Keywords: magnetorheological damper, parameter identification, Bouc-Wen model, semi-active control, black box, benchmark building. Summary Magnetorheological (MR) dampers have received special attention as semi-active devices for mitigation of structural vibrations [1]. Because of the inherent nonlinearity of these devices, it is difficult to obtain a reasonable mathematical inverse model. This paper is concerned with two related concepts. On one hand, it presents a new inverse model of MR dampers based on the normalized Bouc-Wen model. On the other hand, it considers a hybrid seismic control system for building structures, which combines a class of passive nonlinear base isolator with a semi-active control system. In this application, the MR damper is used as a semi-active device in which the voltage is updated by a feedback control loop. The management of MR dampers is performed in a hierarchical way according to the desired control force, the actual force of the dampers and its capacity to react. The control is applied to a numerical three-dimensional benchmark problem which is used by the structural control community as a state-of-the-art model for numerical experiments of seismic control attenuation [2]. The performance indices show that the proposed semi-active controller behaves satisfactorily. References 1 S.J. Dyke, B.F. Spencer Jr., M.K. Sain, J.D. Carlson, "Modeling and control of magnetorheological dampers for seismic response reduction", Smart Materials and Structures, 5(5), 565-575, 1996. doi:10.1088/0964-1726/5/5/006 2 S. Narasimhan, S. Nagarajaiah, E.A. Johnson, H.P. Gavin, "Smart base-isolated benchmark building. Part I: Problem definition", Structural Control and Health Monitoring, 13(2-3), 573-588, 2006. doi:10.1002/stc.99 purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £140 +P&P)
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