摘要
对于地震模拟试验中加速度波形复现方法在低频段精度差的问题,提出了按频率分段进行地震模拟波形复现的控制方法,分别对系统的加速度阻抗、位移阻抗进行辨识,并在处理过程中不断迭代更新。低于转折频率为位移控制区,高于转折频率为加速度控制区,并实现了位移驱动信号与加速度驱动信号的合成。该算法提高了地震模拟试验在低频段的精度,实现了地震模拟试验在整个试验频段内的高精度。最终在研发的地震模拟试验台上,分别对El-Centro地震波与Northridge地震波进行了复现,验证了算法的可行性。
For the problem of poor precision of waveform replication method on earthquake simulation test in low frequency section,the control method of waveform replication algorithm according to the frequency section was put forward. The acceleration impedances and displacement impedances of the system were identified and iterated continuously during the processing. Lower than the turning frequency is displacement zone and higher than the turning frequency was acceleration zone. The algorithm also realizes the synthesis of displacement driving signal and acceleration driving signal. The algorithm improves the precision of earthquake simulation test in low frequency section,and finally realizes the high precision of the earthquake simulation test in the whole test frequency band. The feasibility of the control method is verified by an experiment on the earthquake simulation platform.
作者
高琳焜
陈章位
田磐
贺惠农
Gao Linkun;Chen Zhangwei;Tian Pan;He Huinong(State Key Laboratory of Fluid Power & Mechatronic Systems,Zhejiang University,Hangzhou 310027,China;Econ Technologies Co.,Ltd.,Hangzhou 310011,China)
出处
《建筑结构》
CSCD
北大核心
2018年第S2期299-303,共5页
Building Structure
关键词
地震模拟试验
分频波形复现
系统辨识
驱动信号合成
earthquake simulation test
waveform replication algorithm
system identification
drive signal synthesis
