MR阻尼器的状态跳跃控制参数

State-jump Control Parameters of MR Dampers

对MR阻尼器实施状态跳跃控制可以有效地减少结构的地震响应,状态跳跃控制参数对半主动控制效果有很大的影响,本文对状态跳跃控制的相关参数进行了研究。利用两个数值算例,对采用不同类型的控制参数(位移、速度、加速度)、控制参数的大小、输入地震动的大小等相关因素对结构地震响应的控制效果进行了对比,发现采用速度响应作为状态跳跃控制变量对于减少绝对加速度响应是有利的;建议采用试算法确定合适的速度控制参数,通过和LQG控制相联系的方法给出了该控制参数最优值的估算方法。

Implementing state-jump control of MR dampers can effectively reduce the structural response under earthquake excitations. The relevant parameters of state-jump control algorithm, which have great influence on the semi-active control effects, were studied. Different type of parameter (displacement, velocity and acceleration), different value of control parameter and different peak value of input earthquake excitation were studied in the two numerical examples. It is found that the velocity response is benefit to be used as the state-jump control parameter for reducing absolute acceleration. A trial method was suggested here to determine the control parameter (velocity), and the optimal value of this control parameter(velocity) can be estimated by the principle associated with LQG control.