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研究风荷载激励下考虑变时滞空间网格结构的振动控制。在分析结构变时滞产生原因的基础上,基于动态矩阵预测控制算法,构造预测模型和优化策略,提出对变时滞空间网格结构振动控制的改进方法和控制参数选取的基本原则,指出准确预测系统的未来输出、选择恰当的采样周期是实施振动控制的关键因素。以柱面网壳结构为例并选取适当参数,针对变时滞有控与无控的结构振动系统进行风振控制数值分析与比较。研究结果表明:运用该方法对变时滞空间网格结构的振动控制,可获得满意的控制效果。
Study on Vibration Control of Spatial Lattice Structures Considering Time-varying Space under Excitation of Wind Loads. Based on the analysis of the cause of structure variable time lag and based on the dynamic matrix predictive control algorithm, the prediction model and the optimization strategy are constructed, an improved method and control parameter selection principle are proposed for the vibration control of the space grid structure with varying delay. Predicting the system’s future output and choosing the right sampling period are key factors in implementing vibration control. Take the cylindrical reticulated shell structure as an example and select the appropriate parameters, numerical analysis and comparison of the wind vibration control for the structural vibration system with and without control of variable delay. The results show that the proposed method can achieve satisfactory control effect on the vibration control of space structures with time-varying delays.