基于SMA-压电阻尼器的巨-子结构智能控制  

Smart control of mega-sub structure based on SMA-piezoelectric damper

作　　者：谭平[1] 李森萍[1] 刘良坤[2] 戴纳新[3] 张颖[1] 

机构地区：[1]广州大学工程抗震研究中心,广东广州510405 [2]北京工业大学建筑工程学院,北京100124 [3]桂林电子科技大学建筑与交通工程学院,广西桂林541004

出　　处：《自然灾害学报》2015年第4期78-85,共8页Journal of Natural Disasters

基　　金：国家教育部创新团队研究计划项目(IRT13057);国家基金委面上项目(51208129;51468010);国家教育部新世纪人才项目(NCET-11-0914)

摘　　要：针对巨-子结构体系,提出在巨-子结构间设置柔性隔震层,并增设一种SMA-压电复合智能阻尼器,形成巨-子结构智能控制体系,可有效改善巨-子结构的抗震安全性。介绍了SMA-压电阻尼器的工作原理与力学模型,建立了巨-子结构体系智能控制体系的分析模型,在此基础上构建了巨-子结构智能控制体系的运动方程。基于限界Hrovat最优控制算法和H2/LQG算法设计了巨-子结构智能控制体系的半主动控制器,进行了Simulink控制效果仿真分析,并与传统抗震,被动隔震,SMA-压电阻尼器的Passive-on、Passive-off控制和理论最优的主动隔震控制策略进行了系统的对比研究。仿真分析结果表明,SMA-压电阻尼器实施智能隔震控制时可兼顾主结构与子结构的控制效果,其控制效果与主动控制时接近,远优于被动控制策略。所提出的巨-子结构智能控制体系可望应用于实际工程中,并取得较好的经济和社会效益。This paper proposes a novel smart mega-sub control system, in which seismic isolators are inserted be- tween the mega-structure and sub-structure, and a SMA-piezoelectric composite intelligent damper is installed in the isolation layer to enhance the safety of mega-sub structure system. The working principle and mechanical model of this SMA- Piezoelectric damper was presented. The analytical model of the smart mega-sub control system was built, and the governing equation of the smart Mega-sub control system was established. An H2/LQG control algo- rithm was used for primary controller design, and clipped Hrovat algorithm was employed for semi-active controller design. Numerical simulation of different controllers for the mega-sub control system were carried out within the en- vironment of Simulink and compared systematically. Results show that the semi-active control strategy can achieve very similar performance to the pure active case, and outperforms the passive control strategies. The proposed smart mega-sub control system based on SMA-piezoelectric damper may achieve good economic and social benefits , which is of practical significances and good application prospect.

关 键 词：巨-子结构 SMA-压电阻尼器 控制策略 智能控制 

分 类 号：TU352.1[建筑科学—结构工程] TB381[一般工业技术—材料科学与工程]