%0 Journal Article %T 虚拟控制增益函数未知的随机非线性系统模糊自适应控制 %A 王迎春 %A 张化光 %A 王以忠 %J 自动化学报 %P 170-178 %D 2006 %X ?Theproblemoftrackcontrolisstudiedforaclassofstrict-feedbackstochasticnonlinearsystemsinwhichunknownvirtualcontrolgainfunctionisthemainfeature.First,theso-calledstochasticLaSalletheoryisextendedtosomeextent,andaccordingly,theresultsofglobalultimateboundednessforstochasticnonlinearsystemsaredeveloped.Next,anewdesignschemeoffuzzyadaptivecontrolisproposed.Theadvantageofitisthatitdoesnotrequireprioriknowledgeofvirtualcontrolgainfunctionsign,whichisusuallydemandedinmanydesigns.Atthesametime,thetrackperformanceofclosed-loopsystemsisimprovedbyadaptivemodifyingtheestimatederrorupperbound.Bytheoreticalanalysis,thesignalsofclosed-loopsystemsaregloballyultimatelyboundedinprobabilityandthetrackerrorconvergestoasmallresidualsetaroundtheoriginin4th-powerexpectation. %K Stochasticnonlinearsystems %K fuzzyadaptivecontrol %K virtualcontrolgainfunction %U http://www.aas.net.cn/CN/abstract/abstract16003.shtml