【摘要】 研究含时滞的空间结构振动控制问题。阐明和分析了空间结构的时滞及其产生原因。基于动态矩阵预测控制方法,构造了预测模型和优化策略,进而提出对含时滞空间结构振动控制的改进方法和控制参数选择的一般原则,可解决模型参数和外部干扰不确定的含时滞被控系统的振动控制。以球面施威德勒网壳结构为算例,针对含时滞和不含时滞的空间结构系统进行了振动控制数值计算和比较;研究表明,动态矩阵预测控制方法适用于含时滞的空间结构振动控制,而准确预测系统的未来输出、选择恰当的采样周期等是实施振动控制的关键因素。更多还原

【Abstract】 The presented paper focused on the vibration control of the spatial reticulated structure with time delay.The composition of time delay was investigated.Based on the dynamic predictive control method,the predictive control model and optimization strategy were constituted,and an improved method for the vibration control of the spatial reticulated structure with time delay was put forward.Finally,some principles for choosing control parameters were discussed.Moreover,taking Schwedler reticulated shell structure with and without time delay as an example,a series of computations and comparisons of the vibration control strategy were carried out.It is shown that the dynamic matrix predictive control method is suitable for the vibration control of spatial reticulated structures with time delay,and the prediction for aftertime outputs and the determination of sampling periods play a key role in the vibration control of the structural system with time delay.更多还原