相邻模型结构MR阻尼器半主动控制振动台试验

利用振动台对磁流变(MR)阻尼器连接的相邻模型结构的地震响应进行了研究.为了验证基于MR阻尼器控制系统的控制效果,振动台试验中对3种地震激励下的相邻模型结构采用了2种被动控制策略和3种半主动控制策略.试验中,最大电流被动控制策略和3种半主动控制策略使相邻模型结构各层的地震响应皆有明显降低;半主动控制策略皆采用了加速度反馈的方法以减少试验中所用传感器的数量.试验结果表明:MR阻尼器是有效的半主动控制装置,在被动和半主动控制系统中有稳定的控制效果;基于加速度反馈的控制方法适用于具有闭环增益矩阵的控制算法,可以减少控制系统的硬件投入以及增加半主动控制系统在实际工程应用中的可行性.

Semi-Active Control of Adjacent Model Structures Connected with MR Dampers Using the Shaking Table

The seismic response of two adjacent model structures connected with magneto-rheological(MR) dampers was studied using the shaking table.In order to evaluate the control effect of control system based on MR damper,two passive control and three semi-active control strategies in shake table test were carried out under three different ground motions.In the test,the seismic responses for all floors of adjacent model structures were significantly re-duced by using maximum current passive strategy and three semi-active control strategies.Moreover,the acceleration feedback method was applied to all three semi-active control strategies in order to reduce the number of sensors used in the test.The test results show that the MR damper is an effective semi-active controller and behaves reliably both in passive and semi-active control systems.Results also indicate that the acceleration feedback method has adaptability to control strategies with closed-loop gain matrix,which can reduce the hardware input of control system and increase the feasibility of the semi-acitve control system in practical engineering applications.