二阶段在线迭代时滞补偿方法及试验验证  

A two-stage online iteration time-delay compensation method for real time hybrid testing:simulation and test verification

作　　者：李宁[1,2,3] 周陈[1] 周子豪 李忠献 LI Ning;ZHOU Chen;ZHOU Zihao;LI Zhongxian(School of Civil Engineering,Tianjin University,Tianjin 300072,China;MOE Key Lab of Coast Civil Engineering Structures and Safety,Tianjin University,Tianjin 300350,China;CEA Key Lab of Earthquake Engineering Simulation and Seismic Resilience Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室(天津大学),天津300350 [3]中国地震局地震工程综合模拟与城乡抗震韧性重点实验室(天津大学),天津300350

出　　处：《振动与冲击》2020年第17期31-38,共8页Journal of Vibration and Shock

基　　金：国家重点研发计划(2018YFC1504306,2016YFC0701108);国家自然科学基金重大科研仪器研制项目(51427901);国家自然基金面上项目(51678407)。

摘　　要：实时子结构试验是结构抗震性能研究的重要方法之一;有研究表明,液压伺服系统的时滞在实时子结构试验中产生负阻尼效应,导致试验结果不准确;而试验中时滞是时变参量,无法事先测得;因此,对实时子结构试验控制系统进行时滞补偿具有重要意义。介绍了二阶段时滞补偿的原理,将系统时滞分割为空载定时滞和负载变时滞,提出基于二阶段时滞补偿的控制方法,设计实时计算系统时滞的方法。经数值模拟和刚性构件实时子结构试验,验证所提出的时滞补偿方法具有精度高、鲁棒性好的特点。Real-time hybrid testing(RTHT)is one of important methods for evaluating structural aseismic performance.Published study results show that time delay of a hydraulic servo system generates a negative damping effect in RTHT to cause incorrect test results;time delay in tests is a time-varying parameter,it can’t be measured in advance;it is of great importance to compensate time delay for the RTHT control system.Here,firstly,the principle of two-stage time-delay compensation was introduced.Then,time-delay of a system was divided into no-load time-delay and load variable one,and the control method based on two-stage time-delay compensation was proposed.The real-time calculation method for system time-delay was designed.Finally,numerical simulation and RTHT for rigid components were conducted,respectively.Results showed that the proposed time delay compensation method has features of high accuracy and good robustness.

关 键 词：实时子结构试验 液压伺服系统 时滞补偿 在线迭代 精度 

分 类 号：TH213.3[机械工程—机械制造及自动化]