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Semiactive Backstepping Control for Vibration Reduction in a Structure with Magnetorheological Damper Subject to Seismic MotionsInstitute of Informatics and Applications, University of Girona, Girona, Spain, mauricio.zapateiro{at}udg.edu
Faculty of Technology and Science, University of Agder, Grimstad, Norway
Institute of Informatics and Applications, University of Girona, Girona, Spain
Department of Civil and Environmental Engineering, University of Illinois at Urbana, Champaign, USA
Department of Civil and Environmental Engineering, University of Illinois at Urbana, Champaign, USA The use of magnetorheological (MR) dampers for mitigating vibrations caused by seismic motions in civil engineering structures has attracted much interest in the scientific community because of the advantages of this class of device. It is known that MR dampers can generate high damping forces with low energy requirements and low cost of production. However, the complex dynamics that characterize MR dampers make difficult the control design for achieving the vibration reduction goals in an efficient manner. In this article, a semiactive controller based on the backstepping technique is proposed. The controller was applied to a three-story building with an MR damper at its first floor subjected to seismic motions. The performance of the controller was evaluated experimentally by means of real time hybrid testing.
Key Words: magnetorheological damper • smart structures • vibration reduction • semiactive control.
This version was published on November
1, 2009 Journal of Intelligent Material Systems and Structures, Vol. 20, No. 17,
2037-2053 (2009) |
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