Semi-Active Predictive Control of Isolated Bridge Based on Magnetorheological Elastomer Bearing

作     者：LI Rui ZHOU Mengjiao WU Mengjuan TANG Xiaoming 李锐;周梦娇;吴孟娟;唐晓铭

作者机构：Department of Automation Chongqing University of Posts and Telecommunications 

出 版 物：《Journal of Shanghai Jiaotong university(Science)》 (上海交通大学学报（英文版）)

年 卷 期：2019年第24卷第1期

页      面：64-70页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：the Chongqing Outstanding Youth Found(No.cstc2014jcyjjq40004) the Science and Technology Research Project of the Chongqing Municipal Education Committee(No.KJ1600416) the National Natural Science Foundation of China(No.11372366) the Chongqing Postgraduate Research and Innovation Project(No.CYS17123) the Research Project of Chongqing Science and Technology Commission(No.cstc2018jcyjAX0691) 

主　　题：bridge magnetorheological elastomer bearing(MRB) predictive control time-delay 

摘      要：Time-delay of magnetorheological elastomer bearing(MRB) can bring structural response menace to bridges. This paper investigates a bridge pier-bearing semi-active-coupling control method based on model predictive control(MPC). The presented strategy takes the structure prediction model to predict the state responses of the controlled plant in a period of future time. Then, the control law can be determined by solving a finite horizon optimization problem. The peak shearing force of pier top, the displacement and the acceleration of beam are chosen as control goals, and the vibration isolation rate is applied to characterize the vibration isolation *** is noted that MPC method naturally takes the time-delay and uncertain interference into consideration, and significantly improves the control performance of the system. Finally, the numerical example is described and the seismic response of isolated bridge based on MRB is analyzed. The simulation results show that predictive control can be used to control the time-delay of bridge system in different degrees. The best control performance is at0.4 s. Even if the time-delay reaches 2 s, it is still good. Therefore, the control method significantly reduces the adverse effects of time-delay on the system, and has a good vibration isolation performance.