压电变摩擦阻尼器对结构地震反应的自协调模糊控制
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摘要
为减轻结构的地震反应,制作了一款新型的压电变摩擦阻尼器,并设计了自协调模糊控制算法用于结构的振动控制,控制的目标是减轻结构的位移和加速度反应,通过模糊控制算法建立了压电变摩擦阻尼器电压与结构的响应关系,给出了量化因子的计算公式,建立了模糊控制器来考虑地震波对量化因子的影响。算例表明,对于安装有压电变摩擦阻尼器的结构,采用模糊控制算法控制结构振动效果非常好。
A new piezoelectric friction damper is designed and fabricated in order to reduce the structural damage under earthquakes.The control objective is to minimize both the maximum displacement and acceleration responses of the structure.Interactive relationships between structural responses and input voltage of piezoelectric friction dampers are established by a fuzzy controller.For the absolute value influence of the ground acceleration through fuzzy controller,the equation of scaling factor is established.Numerical simulations for multiple damper cases are given for the efficiency of the intelligent control strategy.
A new piezoelectric friction damper is designed and fabricated in order to reduce the structural damage under earthquakes.The control objective is to minimize both the maximum displacement and acceleration responses of the structure.Interactive relationships between structural responses and input voltage of piezoelectric friction dampers are established by a fuzzy controller.For the absolute value influence of the ground acceleration through fuzzy controller,the equation of scaling factor is established.Numerical simulations for multiple damper cases are given for the efficiency of the intelligent control strategy.
引文
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[7]李士勇.模糊控制.神经控制和智能控制论[M].哈尔滨:哈尔滨工业大学出版社,1996.
[2]Kamada T,Fujita T.Active vibration of frame structures ofshear and bending type with smart structure using piezoelectricactuator[C].Proceedings of SPIE,1997,3041:75-86.
[3]Chen G D,Chen C C.Behavior of piezoelectric frictiondamper under dynam ic loading[C]//Proc,SPIE Symp.on Smart Structure Materials,Smart Systems for Bridges,Structures and H ighways Newport Beach,Calif,2000,3988,54-63.
[4]欧进萍.结构振动控制——主动、半主动和智能控制[M].北京:科学出版社,2003.
[5]瞿伟廉,陈朝晖,徐幼麟.压电材料智能摩擦阻尼器对高耸钢塔结构风振反应的半主动控制[J].地震工程与工程振动,2000,20(2):94-99.
[6]徐赵东,郭迎庆.MATLAB语言在建筑抗震工程中的应用[M].北京:科学出版社,2004.
[7]李士勇.模糊控制.神经控制和智能控制论[M].哈尔滨:哈尔滨工业大学出版社,1996.
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