【摘要】 推导了基于阻尼器速度反馈的结构振动方程和状态控制方程,提出以控制系统闭环传递函数的H∞范数为位置寻优指标,提出基于结构动能和弹性能度量结构振动控制效果的指标.针对空间网格结构,利用遗传算法,在对阻尼器的布置位置实施二进制编码基础上,通过代际交叉和变异操作,寻找阻尼器优化位置.研究显示,本方法可有效寻找阻尼器的优化布置位置,有助于减小空间网格结构的振动反应.更多还原

【Abstract】 Dynamic equations and state equations of spatial reticulated structure with MR dampers based on direct velocity feedback control strategy were given.The H∞ norm of closed-loop transfer function was adopted to be the optimization index,a new method for the placement optimization of MR dampers suitable for spatial reticulated structure was proposed.After binary coding for the MR dampers placement,genetic algorithm was employed to search the optimal placement.The control effect index was proposed through the combination of kinetic energy and potential energy of the structure.The numerical results show that the present method was efficient to find the optimal placements of MR dampers and can reduce the vibration response of spatial reticulated structure effectively.更多还原