【摘要】 近年来,半主动控制系统在国内外受到了诸多关注,取得了很大的研究进展,但是仍然存在明显的不足之处。本文提出了半主动控制系统研究过程中有待解决的若干关键问题。首先综述了各种半主动控制装置和对应控制律设计的研究现状,然后分析了它们各自的优缺点。此外,也就足尺控制系统研发、控制律设计、控制装置优化和时滞补偿等半主动控制系统中的共性问题进行了分析,并给出了相应的建议。研究指出:常规变刚度控制系统抑制振动频带窄,并且不利于结构的加速度反应控制;粘性变阻尼控制与被动阻尼控制相比仅在结构远离共振时才有意义。更多还原

【Abstract】 In recent years,considerable attention has been paid to research and development of semiacitve structural control systems,and great progress has been made.However,the latest research results show that there still exist significant limitations for engineering application.Some key problems in developing the semiacitve control system are presented in this paper.First,a detailed review of semiactive control systems is provided including the recent advances in design of both control devices and control algorithms.The semiactive systems which are reviewed include variable stiffness systems,variable fluid dampers,magnetorheological dampers,tuned mass dampers and tuned liquid dampers.Next,their advantages and limitations are also discussed.In addition,some suggestions for design of full-scale control devices and control algorithms,placement optimization of control devices and compensation of time delay are also given.It is pointed out that:(1) the traditional variable stiffness system can only adjust the frequency of the structure within a narrow frequency band,and may be negative for the acceleration response control of the structure;(2) only far from the resonance may the variable dampers be effective for seismic response control of structures as compared to the passive dampers.更多还原