主动调频液柱阻尼器基于遗传算法的LQR控制优化设计

Optimal design of ATLCD with LQR control based on genetic algorithm

ATLCD由调频液柱阻尼器(Tuned Liquid Column Damper,TLCD)发展而来,在TLCD液柱端部连接气压控制箱,通过引入控制气压对结构实施主动控制。采用被动TLCD优化设计方法设计阻尼比及频率比,采用LQR算法确定ATLCD系统的主动控制力,并对LQR算法中权矩阵采用遗传算法进行优化。以一五层钢框架结构为例,顶层装ATLCD用LQR算法进行主动控制,加载El-Centro地震波进行时程响应分析,比较无控结构及被、主动控制结构的时程响应结果表明,采用ATLCD的减振效果明显优于采用被动装置。

Active tuned liquid column damper （ATLCD）,developed from the tuned liquid column damper （TLCD）,is based on the adjuctment of pressure in a gas chamber at the end of the liquid column by virtue of a pressurized reservoir.In the design of ATLCD,the Q and S matrices were obtained by using genetic algorithm.The control performance of ATLCD used in multiple degrees of freedom system was verified via the example of a five-story structure subjected to earthquake excitation.The results indicate that the ATLCD installed in high-rise building can achieve significant response reduction in comparison with the passive TLCD.