建筑结构在地震作用下的主动减振控制方法

Active Vibration Control for Seismic-excited Building Structures

以降低地震作用下建筑物应激振动为目标,考虑量测噪声、数字量化及执行器饱和等制约因素,提出了一种具有鲁棒性的主动减振控制方法.首先,在建筑物层间和楼顶布置主动减振控制器,提出具有鲁棒性的观测器以估计建筑物应激状态信息;然后,借助稳定性分析提出了闭环系统稳定条件,给出了减振控制器设计方法;最后给出仿真算例以验证本文方法有效性.计算结果表明,所提出的主动减振控制策略不仅可以保证闭环系统均方稳定性,而且可指定闭环系统收敛率并满足预先指定的H_2/H_∞减振性能指标.

This paper investigates the robust active damping vibration control for seismic-excited building structures under stochastic measurement noise,quantisation and actuator saturation.A robust observer is proposed to estimate the stress information of the building,and the active damping controllers are placed in some storeys including the top floor.By the stability analysis,the stability condition of the closed loop system is obtained,and the controller design method is presented with a simulation example to verify the effectiveness of the proposed method.The proposed method not only guarantees the stability of the closed-loop system in mean square sense,but also regulates the convergence rate and achieving a prespecified H2/H∞index.