摘要
土木工程结构振动控制由于模型的自由度数目很大,控制器阶次非常高,从而导致主动控制和半主动控制实施过程中时滞效应十分的突出。本文在采用均衡实现技术对结构模型进行降阶的基础上,进行LQ控制器的设计,考虑了对应较小奇异值的状态变量对低阶控制器的影响,对LQ控制器的设计进行改进,优化了控制效果。本文通过对Highway Bridge的Benchmark模型进行LQ控制器设计的改进研究,验证了本文方法的改进效果。
Since the models of civil engineering structures usually possess comparatively large DOFs,controller designed directly with original structure model is high order.So the phenomenon of time delay is usually predominant when the active/semi-active control technologies are applied to suppressing the structure dynamic response.In this paper the balanced realization truncation is adopted to obtain the internal balanced model firstly,and then to design LQ controller for the reduced model.Then improve LQ controller design to improve controlling effectiveness for internal balanced order reduced system.The improving effectiveness for designing LQ controller are demonstrated by simulation for highway bridge benchmark model.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2011年第1期44-47,共4页
Chinese Journal of Computational Mechanics
基金
国防基础科研(A1420080166-08)资助项目
关键词
均衡实现
降阶系统
LQ控制器
改进设计
balanced realization truncation
order reduced system
LQ controller
improved design
作者简介
李雪峰（1980-），男，博士，讲师（E-mail：hfgdlxf@126．com）．
