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大型复杂结构在强震作用下会进入弹塑性变形阶段,形成非线性滞变系统。提出将复杂的大型结构分解成若干个子结构,基于子结构模型,考虑系统的不确定性因素,利用滑移模态控制(变结构控制)理论,分析在外界干扰以及系统摄动不可测的情况下的振动控制算法。对集中控制在作动器失效和反馈信息丢失情况下进行分析,并在第3阶段9层Benchmark模型上进行了仿真,分析了其控制效果。为了改进集中控制鲁棒性能较差的缺点,设计了滑模分散主动控制算法,并在模型上进行了仿真分析。比较了集中滑模控制和分散滑模控制的控制效果,得到了一些定性结论。
Under the action of strong earthquake, the large and complex structure will enter the stage of elastic-plastic deformation and form a nonlinear hysteresis system. It is proposed to decompose the complex large-scale structure into several sub-structures. Based on the substructure model, the uncertainties of the system are considered, and the sliding mode control (variable structure control) theory is used to analyze the influence of external disturbance and system perturbation Under the vibration control algorithm. The centralized control was analyzed under the condition of actuator failure and feedback loss. The simulation was carried out on the 9th floor Benchmark model in stage 3, and its control effect was analyzed. In order to improve the weakness of poor robust performance of centralized control, an active sliding mode control algorithm is designed and simulated in the model. The control effects of centralized sliding mode control and decentralized sliding mode control are compared, and some qualitative conclusions are obtained.