基于模态控制的巨-子型有控结构的风振主动控制研究  

Active Control of a Mega-Sub Controlled Structure Subjected to Random Wind Loads Based on Modal Control

作　　者：秦相军[1] 张洵安[1] 刘新爱[1] 王显彬[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710072

出　　处：《机械科学与技术》2009年第2期191-195,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：西北工业大学科技创新基金项目(M450211);西北工业大学研究生创业种子基金项目(Z200534)资助

摘　　要：基于模态控制,提出了抑制新型巨-子型有控结构风振响应的主动控制方法,推导并建立了其控制方程,计算了控制全部模态和部分模态时的结构反应及控制力,并与无控状态及采用LQR算法时进行了对比分析。结果表明该新型结构采用主动模态控制后能够有效地减小结构的位移和加速度响应,因此实际设计控制器时,可以对巨-子型有控结构的响应进行模态控制,从而可以有效地控制结构响应并使结构分析的自由度数目减少。Active control of a new mega-sub controlled structure （MSCS） under random wind loads based on modal control is proposed. A method and its dynamic equations for assembling parameter matrixes of the MSCS under ran- dom wind loads are presented. The responses and control force of the MSCS with full modal control and part modal control is calculated, which is further compared with the corresponding status without control and using linear quad- ratic regulator（LQR） algorithm. The result indicates that the new structure employing active modal control does significantly reduce the vibration displacement and acceleration response of the MSCS. It is concluded that the modals of the MSCS can be controlled by designing the controller, thus the structure response can be controlled effectively and the degrees of freedom can be reduced in structural analysis.

关 键 词：巨-子型有控结构 模态控制 主动控制 风振反应 

分 类 号：TU311.3[建筑科学—结构工程]