摘要
该文提出了基于位移反馈的MR阻尼器对拉索振动的自适应控制算法。采用非线性有限元数值仿真方法分析了在外加简谐激励强迫振动条件下MR阻尼器对拉索自适应半主动控制的效果。将半主动控制效果与MR阻尼器、粘性油阻尼器分别对拉索实施最优被动控制的效果进行了比较。研究结果表明:在相同的外激励条件下,自适应控制算法参数的最终优化值不受初始值的影响;自适应控制时拉索稳态振动的最大动能和位移幅值显著小于MR阻尼器或油阻尼器最优被动控制时拉索相应的值。
A semi-active adaptive control algorithm for closed-loop cable vibration control with magnetorheological （MR） dampers is developed based on measurement displacement. A geometrical nonlinear finite element formulation is employed for analyzing the dynamic responses of the cable-MR dampers system in time domain. The performance of the proposed semi-active control algorithm with MR dampers is compared with that of the passive control algorithm by using MR dampers or oil dampers optimally tuned to the first three modes. The numerical simulation results show that the initial value of parameters of adaptive control algorithm does not influence their final optimization results. The semi-active control is superior to the optimum passive control tuned to a particular mode.
出处
《工程力学》
EI
CSCD
北大核心
2011年第9期103-108,共6页
Engineering Mechanics
基金
国家自然科学基金重点项目(50738002)
国家自然科学基金项目(50578063)
湖南省教育厅项目(09B034)
关键词
桥梁工程
斜拉索
半主动控制
MR阻尼器
控制算法
bridge engineering
stay cables
semi-active control
MR damper
control algorithm
