含磁流变阻尼器的框架结构控制研究

Research on control of frame structures with magnetorheological dampers

以框架结构为对象进行振动控制研究.为保证地震作用下系统半主动控制的顺利实现,选择了基于系统可控性/可观性的内平衡理论的模型降阶方法.在考虑结构参数、几何尺寸不确定性,磁流变阻尼器非线性特征以及实际控制离散性和地震作用随机性因素的基础上,研究了基于离散状态方程和以控制力为阶跃函数的广义预测控制策略,提出了一种可用于框架结构振动控制的半主动控制技术,并通过算例验证了该技术的有效性.

The study was performed on vibration control of frame structures. For successful realization of semi-active control of the system under the action of earthquakes, a model reduction method was chosen based on the internal balancing theory on the contmUability/observability of the system. In consideration of the indeterminacy of structural parameters and geometrical dimensions, the non-linearity of magnetorheologieal damper, the discrete characteristics in actual control, and the randomieity of earthquakes, a generalized predictive control scheme based on the discrete state equation with the control force taken as the step function was studied, and a semi-active control technique for vibration control of frame structures was proposed. Finally, a numerical example was given to verify the effectiveness of the present method.