逆模型驱动的实时混合试验两级自适应时滞补偿方法

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关键词：实时混合试验；两级时滞补偿；多试验子结构；逆补偿；自适应补偿中图分类号：TU317；TU352.11 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202307025

Two-stage adaptive time-delay compensation method driven by inversemodelforRTHS

WANG Shangzhang1，²， YANG Ge1，2.3， XIAO Jiajun ⋅1，2 ，WU Bin1，2 （1.School of Civil Engineeringand Architecture，Wuhan Universityof Technology，Wuhan 43Oo70，China; 2.Sanya Science and Education Innovation Park，Wuhan University of Technology，Sanya 572Ooo，China; 3.Key Laboratory of Earthquake Enginering Simulation and Seismic Resilience of China Earthquake Administration， TianjinUniversity，Tianjin 3Oo35O，China）

Abstract：Duringreal-timehybridsimulation（RTHS）ofnonlinearspecimens，theinteractionbetweenthespecimenandtheloadingsystemcanleadtovariationsinthespecimen’sbehavior，consequentlyafectingthetimedelayintheservosystem.Onlineesti mationof thesystem’stimedelayenables theaplicationofanadaptive time-delaycompensation methodforcontroling time-varyingsystems.Neverthele，，duringtheinitialstagesofparameteridentification，theestimatedvauesfrequentlyehbito tablefluctuations，whichcanhaveadetrimentalimpactontheefectivenessofcontrol.Tothisend，atwostageadaptive time-delaycompensation methoddrivenbytheinverse modelforRTHSisproposed.Firstly，theinverse modelcontrolerof the systemisusedtoperformcoarsecompensationtoeliminatethetesterorcausedbythemaintimedelay.Then，theadaptivedelay compensationmethodbasedonrecursiveleastsquares isusedtocompensatetheremainingdelaytofurthercontroltheaccuracy.By usingthetwostoryshearframeas theprototypeandtheself-centering viscousdampersas thespecimens，atime-delaycompensationRTHS iscariedoutsmultaneouslyonthetwoexperimental substructures.Numericalsimulationsandexperimentalresults showthatthecontrolacuracyoftheproposedmethodishigherthanthatofthesingle-stagetime-delaycompensationmethod，nd itcanbeapplied toRTHS involving multiple experimental substructures.

Keywords：real-timehybridsimulation（RTHS）;twostagetime-delaycompensation;multipleexperimentalsubstructures;vee compensation;adaptive compensation

为考虑速率对试件的影响，实时混合试验以常规子结构拟动力试验为基础，实时实现数值子结构和试验子结构的边界条件，从而拓展混合试验的应用范围，受到了各国学者的广泛关注和应用研究[2-3]。（剩余11449字）