基于CSI效应的直线电机驱动塔系结构风振控制研究

控制系统与结构振动的相互作用(Control Structure Interaction,简称CSI)广泛存在于结构与主动控制系统之间,然而目前在直线电机驱动的塔系结构风振控制研究中往往没有充分考虑CSI效应,使得理论控制效果与实际控制效果存在偏差。为了考察CSI效应对塔系结构风振控制的影响,首先以电磁驱动AMD系统"电-力-运动"相互关系模型为基础,建立考虑CSI效应的塔系结构直线电机驱动AMD风振控制系统模型;其次综合权衡计算效率和控制精度的关系,选取考虑低阶CSI效应模型以及最经典的LQR控制算法。在此基础上,对该塔系结构确定是否考虑CSI效应进行相应的控制分析。结果表明,CSI效应在塔系结构风振控制中起着重要的作用,制定与实际工程结合更佳的直线电机驱动AMD系统风振控制方案中需要考虑CSI效应,为以后在实际工程中推广应用提供一种新思路。

Wind-induced Vibration Control of Linear-motor-drivenTower Structures Considering the CSI Effect

Control-structure interaction (CSI) often occurs between structures and active control systems. However, current research on controlling the linear-motor-driven active-mass-damper (AMD) wind-induced vibration in tower structures doesn''t always fully consider the CSI effect, which leads to differences in the theoretical and actual control effects. To investigate the influence of the CSI effect on the control of a tower structure''s wind-induced vibration, we first used the "electricity-power-movement" interaction model of an electromagnetically driven AMD system to establish a model of a linear-motor-driven AMD wind-induced vibration control system for tower structures that considers the CSI effect. Then, based on a tradeoff between computation efficiency and control accuracy, we adopted a model that considers a reduced-order CSI effect and uses the classical LQR control algorithm. We then performed a corresponding control analysis of the tower structure. Based on our results, we can conclude that the CSI effect plays an important role in controlling wind vibration in tower structures, and must be considered in the linear-motor-driven AMD wind-induced vibration control scheme to better align its results with those of actual projects. The results of this study provide a new consideration for future practical engineering applications.