多运动参量时域复现的地震模拟控制方法研究  

Research of earthquake simulation control of multi-movement parameters replication

作　　者：田磐[1,2] 陈章位[1] 

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027 [2]镇江高等专科学校机械系,江苏镇江212003

出　　处：《振动工程学报》2013年第5期715-721,共7页Journal of Vibration Engineering

摘　　要：针对加速度时域复现控制方法存在位移幅值正偏差的缺点,提出多运动参量时域复现的地震模拟控制方法。该控制方法将地震模拟试验频段划分为位移控制区和加速度控制区,利用自适应控制不断对系统加速度阻抗和位移阻抗进行辨识,再设计合成方法生成系统驱动信号,能同时对位移和加速度参考信号进行时域复现,最终实现在整个试验频段内的高精度地震模拟试验。在浙江大学构建的振动台上进行地震模拟试验表明:该控制方法在进行数帧地震模拟试验后,加速度复现时域相关系数能达到97%;同时能实现较高的位移时域复现精度,位移峰值误差小于5%。Acceleration replicate control in time domain is generally used in earthquake simulation test.To overcome the shortcoming of positive displacement amplitude in this control,an earthquake simulation control strategy based on multi-movement parameters replicate control in time domain is proposed.This control method divides the earthquake simulation frequency band into displacement-controlled zone and acceleration-controlled zone,and continual identifies the impedance of the system acceleration and displacement impedance using adaptive control,and designs synthesis method to produce shaker drive signal,and replicate the displacement and acceleration reference signals at the same time,and ultimately to achieve high-precision earthquake simulation test in the all test frequency band.The experimental results which are got in Zhejiang University shaking table indicate that this control can obtain the acceleration correlation coefficient of reference signal and control signal in time domain can reach 97％ after several frames of earthquake simulation test; meanwhile can obtain higher accuracy of the displacement replication in time domain that displacement peak error of less than 5 ％.

关 键 词：地震模拟试验 多运动参量复现控制 阻抗辨识 驱动信号合成 自适应控制 

分 类 号：P315.8[天文地球—地震学] TP273.2[天文地球—固体地球物理学]