斜拉索基于最优控制力的振动控制

Vibration Control for Stay-cable Using Optimal Control Force Strategy

采用Spencer的MR模型对斜拉索和MR阻尼器组成的系统进行了动力分析.基于最优控制力将主动控制算法(线性最优控制算法、特征结构配置法)与施加电压的切换方法(剪切优化控制法、基于阻尼器出力和速度法)有机结合,并考察了MR阻尼器安装位置、斜拉索基频及激励荷载大小等各种因素对MR阻尼器制振效果的影响.研究结果表明:MR阻尼器对斜拉索半主动控制的减振效果优于最优的被动控制,并优于最优的粘性油阻尼器。

The dynamic responses of a cable with MR dampers are explored using Spencer photometric model. Vibration mitigation of the cable using MR dalnpers in a Semi-active mode is investigated by simulation and compared to that of passive control. The semi-active control strategies of cable vibration take the combination of the optimal damper force and the voltage control. The optimal damper force are derived by LOC（Linear Optimal Control） and PA（Pole Assignment）. The voltage is converted by COC（Clipped-Optmal Control） and Hrovat method. The results demonstrate the effective dampening to the cable vibration using the proposed strategy.