Hierarchical semi-active control of base-isolated structures using a new inverse model of magnetorheological dampers

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• 作者：Arash Bahar ; Francesc Pozo ; Leonardo Acho ; José ; Rodellar ; Alex Barbat
• 关键词：MR damper ; Parameter identification ; Benchmark building
• 刊名：Computers and Structures
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：88
• 期：7-8
• 页码：483-496
• 全文大小：1336 K

文摘

Magnetorheological (MR) dampers have received special attention as semi-active devices for mitigation of structural vibrations. 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. The performance indices show that the proposed semi-active controller behaves satisfactorily.