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ID:36573957
大小:3.12 MB
页数:102页
时间:2019-05-12
《神经模糊系统研究及其在电厂协调系统中的应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、华北电力大学(保定)博士学位论文神经模糊系统研究及其在电厂协调系统中的应用姓名:林碧华申请学位级别:博士专业:热能工程指导教师:韩璞20050401英文摘要AbstractNeuralFuzzySystemfNFS)isanewfuzzyinferencesystemstructurcthatcombinedfuzzylogicsystemwi也neuralnetworks.ItistheneuralnetworkrealizationforTakagiandSugenofuzzyinferencesystem.Itcallapproachanylinearandnonli
2、nearfunction试thanyprecision,butalsoquickenconvergingspeed,decreasepreciseerrors。andlessertrainingsamplesthatareneeded.Thispaperresearchedthelearningability,generalizationability,methodofinputselection,overfittingproblemanddimensiondisasterofNFS.Intheend,NFSWasappliedtothemodelingandcontrol
3、ofCoordinatedControlSystem(ccs)thatiscomplexsystemofpowerplanttovalidatethevalidityofNFS.1、Theeffectthatthecombinationofinput,thentunbcrofmembershipfunctionofinput,trainingtimesandtrainingsampleaffe:.etthelearningabilityandgeneralizationabilityofNFSwasresearchedrespectively.Therelationbetw
4、eenthelearningabilityandgeneralizationabilityWasstudied.2、Aperformanceindexoferrorwaspresented.ThisindexisakindofevaluationofneuralfuzzymodelperformanceandsyntheticallyconsideredtrainingerrorandcheckingerrorofNFS.3、AnewmethodofinputselectionforNFSWasproposed.Thismethodiseasy,fast,andcalldi
5、rectlyobtainn,mandtdoftheobjectsystem.Anotheradvantageisthatprecedenceorderofinputselectionindicatestheimportancegradeofinputinfluencingoutput.4、AsfortheoverfittingproblemofNFS.thispaperproposedamethodofselectingtrainingsampleandcheckingsampleandamethodofselectingthemostbefittingtrainingti
6、mes.5、AsforthecomplexsystemmodelingbasedonNeuralFuzzySystem,Thispaper(1)researchedthestructureandlearningalgorithmfortheMultistageNeuralFuzzySystem(MNFS);(2)presentedamethodofinputselectionbasedonMNFS;(3)presentedamethodofbuildingthemodelofthemulti·outputsystemsbasedonMNFS.6、Becauseofthela
7、rgetime-delayofCCSofBoiler-turbineunit,thispaperdesignedtwo-stageneuralfuzzysystemtObuildthemodelsofCCS.NFSwasrespectivelyusedtobuildthenonlinearmodel,thelinearmodelandtheNFSmodelbuihn华北电力大学博士学位论文accordingtothefielddataoftheCCS.Thesimulationresultsshowthatthem
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