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Journal of Applied Sciences

Year: 2011 | Volume: 11 | Issue: 15 | Page No.: 2816-2822
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Authors

M.S. Shahidzadeh

H. Tarzi

M. Dorfeshan

Keywords

Research Article

Takagi-Sugeno Fuzzy Control of Adjacent Structures using MR Dampers

M.S. Shahidzadeh, H. Tarzi and M. Dorfeshan
In this study, a semi-active TS fuzzy control strategy for seismic response reduction of adjacent structures using 1000 kN Magnetorheological (MR) dampers between two structures and 20 tons MR dampers in the taller structure simultaneously has been presented. Coupled building control has been shown to be a viable method to protect tall buildings from seismic excitation. When a control method based on fuzzy set theory for buildings with MR dampers is used for vibration reduction of buildings, it has an inherent robustness and easiness to treat the uncertainties of input data from the ground motion and structural vibration sensors, and the ability to handle the non-linear behavior of the structures because there is no longer a need for an exact mathematical model of the structures. However, a semi-active fuzzy control system has the advantage to produce the required voltage or current to be input to the damper so that a desirable damper force can be produced and thus reduces the control force for the structural response. Moreover, the proposed control strategy is fail-safe in that the bounded-input, bounded-output stability of the controlled structures is guaranteed. The results of the numerical simulations show that the proposed semi-active control system consisting of a fuzzy controller and MR dampers can be beneficial in reducing seismic responses of adjacent structures.
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