粗糙集理論在動(dòng)態(tài)系統(tǒng)故障檢測(cè)與診斷中的應(yīng)用.pdf

1、南京理工大學(xué)碩士學(xué)位論文粗糙集理論在動(dòng)態(tài)系統(tǒng)故障檢測(cè)與診斷中的應(yīng)用姓名：胡瀅申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：王執(zhí)銓20040701碩士論文粗糙集理論在動(dòng)態(tài)系統(tǒng)故障檢測(cè)與診斷中的應(yīng)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