粗糙集理論在動態(tài)系統(tǒng)故障檢測與診斷中的應用.pdf

1、南京理工大學碩士學位論文粗糙集理論在動態(tài)系統(tǒng)故障檢測與診斷中的應用姓名：胡瀅申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：王執(zhí)銓20040701碩士論文粗糙集理論在動態(tài)系統(tǒng)故障檢測與診斷中的應用AbstractAimingtosolvesomeproblemsandfollowtrendsinfaultdetectionanddiagnosis，combinedwithnewresultsobtainedinrelativedis

2、cipline，thewayoffaultdetectionanddiagnosisbasedonroughsetstheoryispresentedinthisdissertation，includingRoughsetsmodelOnthisbase，someextendedmodelsofroughsetsarestudied，includingtheirusesinfaultdiagnosisInthisdissertation

3、，somerelativeknowledgeandconceptofFDDfirstateintroducedInabundanceofwaythenchooseRStheoryasthemethodoffaultdiagnosisFollowingtheintroductionofRStheorywestudydeeplyontheanalysismethodofinformationsystems：reductandrules，Th

4、emaincontentsare：(1)firstintroducediscernmentmatricesanddiscernmentfunction，thenimprovesearchmethodofreductofinformationsystems，suchaspretreatmentstrategyofdiscernmentmatricesbyusinglowerdimensionandsparsitymatrices，heur

5、isticsearchalgorithmofminimalreductbasedonattributefrequencyheuristicfunction(2)foracquisitionofrulesproposethedefinitionsofobjectreductandreductofconditionalequivalentclass，correspondingtowhichgeneralizeapproximationofc

6、onceptandgetallreductrulesbyconstructingdecisionmarticeanddecisionfunctionfurthermore，presentanalgorithmofserchminimaidiagnosismodelbasedonbeliefdegreeandsupportstrengthinuncertainty(3)threemodifiedRSmodel—basedtheoryisp

7、resented：bygeneralizingsingledecisionofobjecttogeneraldecision，generalizetheanalysismethodofclassicinformationsystemtoinconsistentinformationsystemandgetmoreconcisereductgeneraldecisionruleset；variableprecisionroughsetst