基于幂指数法的地震模拟振动台频域前馈补偿方法  

Frequency-domain feedforward compensation method for earthquake shaking tables based on the power exponential method

作　　者：纪金豹[1] 杨森[1] 胡宗祥 JI Jinbao;YANG Sen;HU Zongxiang(Beijing Key Laboratory of Seismic Engineering and Structural Diagnosis and Treatment,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学工程抗震与结构诊治北京重点实验室,北京100124

出　　处：《地震工程学报》2024年第1期199-206,共8页China Earthquake Engineering Journal

基　　金：国家自然科学基金资助项目(51978015,51578024)。

摘　　要：针对地震模拟振动台受到系统和试件非线性等因素影响,导致波形再现精度不高的问题,提出基于幂指数法的地震模拟振动台频域前馈补偿方法以提高振动台的控制效果,通过数值仿真和实际振动台试验对该方法的控制性能进行研究。研究结果表明:基于幂指数法的地震模拟振动台频域前馈补偿方法能够快速收敛,迭代次数较少,可以大幅提高振动台的波形复现精度,能够提高振动台的控制性能。The operation of electrohydraulic servo earthquake shaking tables can be affected by the system and type nonlinearities,leading to inaccurately reproduced waveforms.We propose a frequency-domain feedforward compensation method based on the power exponential method to improve the control of a shaking table during an earthquake simulation.The performance of the proposed method is evaluated using numerical simulations and actual earthquake shaking table tests.The results show that the proposed method converges quickly and requires fewer iterations than other methods.As a result,the waveform reproduction accuracy of earthquake shaking tables and their control performance can be significantly improved.

关 键 词：地震模拟振动台 振动台控制 前馈补偿 幂指数方法 迭代学习控制 

分 类 号：TU352[建筑科学—结构工程] P315.9[天文地球—地震学]