电磁式惯性型作动器与结构耦合系统建模与试验研究

Modeling and testing for electromagnetic mass damper and structure coupled system

针对结构振动与电磁驱动AM D控制系统(以下简称EM D系统)的相互作用问题,提出了是否考虑、以及考虑何种程度相互作用的三种理论计算模型并进行了试验研究。首先试验比较了EM D系统在正弦扫频控制电压输入下各阶理论模型预测结果与试验结果的差异,验证了各模型对系统的描述精度;其次以E l C en tro地震波输入为例,试验比较了3种计算模型在3种控制算法共9种试验工况下,EM D控制系统对结构地震响应控制效果的影响。本文所有试验结果均表明只有考虑相互作用、并且充分考虑高阶相互作用才能最佳地描述EM D控制系统在结构中真实的工作状态,才能充分发挥EM D系统对结构振动的控制作用,从而为实现高性能的结构振动主动控制试验与应用奠定基础。

To investigate the effect of control-structure-interaction （CS]）between the innovative electromagnetic mass damper （subsequently called the EMD） and the structure, three computation models were developed and experimentally validated in this paper, which correspond to considering different levels of precisions for the whole system. First, the on-line test results under sine sweep control voltages input were compared with predictions based on those theoretical models. Then, shaking table tests of these models under three control algorithms were conducted to study the impact of modeling considerations on control performance. At last, all the test results show that only if the CSI effect, especially the higher-order CSI effect, is fully considered, the working characteristics of the EMD system can be accurately described, and its performance for reducing structural vibrations can be mostly exerted, which is necessary for the EMD system to realize higher performance both in experiments and practices.