摘要
设计合理有效的磁流变阻尼器半主动控制方法,对于整体结构的减震效果尤其重要,而磁流变阻尼器的精确建模是磁流变阻尼器控制方法设计及仿真的首要前提。介绍了常用的四种参数模型,包括Bingham模型、修正的Bingham模型、Bouc-Wen模型及现象Bouc-Wen模型,并对模型的优缺点进行了讨论。基于磁流变阻尼器的力学特性试验,选取三种磁流变阻尼器模型进行Simulink建模仿真分析,指出现象Bouc-Wen模型可以较好拟合磁流变阻尼器的各项性能。最后,采用一种基于最小二乘法原理的参数识别方法,基于Matlab中的Simulink GUI图形用户界面设计开发了参数识别程序,对现象Boucwen模型进行参数识别以及线性拟合,将仿真结果和试验数据进行对比,结果表明:程序拟合结果和试验数据吻合很好,相应参数满足要求,具有较好的实际应用价值。
When utilizing magnetorheological(MR) damper in structural control, one of the challenges is the development of effective control algorithms and control law based on available feedback measurements. To develop control algorithms that take maximum advantage of MR damper, high fidelity model must be developed that can adequately characterize the damper’s nonlinear behavior. First, a brief review of four idealized models for MR damper is introduced, including Bingham model, modified Bingham model, BoucWen model and phenomenological Bouc-Wen model, and the advantages and disadvantages of these models are discussed. Secondly, based on the mechanical characteristic test of the MR damper, three models are selected for Simulink modeling and simulation analysis. The analysis indicates that the phenomenological Bouc-Wen model fits well for the performance of the magnetorheological damper. A tool of parameter identification for phenomenological MR damper model is developed based on nonlinear least square method by using the Simulink GUI graphical interface in Matlab. Moreover, identification results and curve fitting results are verified with experimental data. The identification results show that the fitting results and the test data are in good agreement, and the system identification tool meets the requirements which has good practical application value.
作者
李歆
张颖
LI Xin;ZHANG Ying(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150086,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)
出处
《结构工程师》
2022年第6期92-100,共9页
Structural Engineers
基金
中国地震局工程力学研究所基本科研业务费专项资助项目(2019D21)
国家自然科学基金资助项目(51908419)。
