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An off-and-towards-equilibrium strategy for vibrational control of structures

Earthquake Engineering and Engineering Vibration 2006年第2期5卷 195-203页

作者：杨润林童迈周锡元闫维明刘锡荟 Department of Civil Engineering Civil & Environment Engineering School University of Science and Technology Beijing National Center for Earthquake Engineering Research SUNY at Buffalo 109 Red Jacket Quad. Buffalo NY 14261 USA Professor School of Architecture and Civil Engineering Beijing University of Technology Electronic Information Center Ministry of Information Industry

Traditional control strategies have difficulty handling nonlinear behavior of structures, time variable features and parameter uncertainties of structural control systems under seismic excitation. An off-and-towardsequilibrium （OTE） strategy combined with fuzzy control is presented in this paper to overcome these difficulties. According to the OTE strategy, the control force is designed from the viewpoint of a mechanical relationship between the motions of the structure, the exciting force and the control force. The advantage of the OTE strategy is that it can be used for a variety of control systems. In order to evaluate the performance of the proposed strategy, the seismic performance of a three-story shear building with an Active Tendon System （ATS） using a Fuzzy Logic controller （FLC） is studied. The main advantage of the fuzzy controller is its inherent robustness and ability to handle any nonlinear behavior of structures. However, there are no design guidelines to set up the corresponding control rule table for a FLC. Based on the proposed strategy for the FLC, a control rule table associated with the building under study is developed, which then allows formation of a detailed algorithm. The results obtained in this study show that the proposed strategy performs slightly better than the linear quadratic regulator （LQR） strategy, while possessing several advantages over the LQR controller. Consequently, the feasibility and validity of the proposed strategy are verified.

关键词： structural vibration control control strategy off-and-towards-equilibrium control fuzzy control seismicexcitation active tendon system

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