故障诊断技术在造纸控制中的研究与应用

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1、陕西科技大学硕士学位论文故障诊断技术在造纸控制中的研究与应用姓名：汪宁申请学位级别：硕士专业：电力电子与电力传动指导教师：孟彦京20090601修改，并在发现故障后完成故障处理。最后，文章提出一种远程故障诊断中心的结构设计，这部分将在我们课题组未来的研究中逐步实现。关键词：故障诊断技术，DCS，专家系统，远程监控系统IlRESEARCHANDAPPLICATIoNoFEA仉TDIAGNOSISSYSTEM矾PAPERML悯INGCoNTRoLABSTRACTInpaper-makingcontrolsystem，whenthecontrol

2、lingsystemthatdesignedforthepaper-makingmaygetabortedbytheabnormalinterferenceandleadtoinstability,theliquidlevel，pulpflowconcentration，andotherprocesscontrolparameterswillfluctuatethataffectthequotaandqualityofpaperweb．Underthiscircumstance，thecontrollingsystemisrequiredt

3、omakerapidjudgesandfigureoutthesolutionassoonaspossibleaccordingtoitsprogramsanditsexperience．Sothereliabilityofthefaultdiagnosistechnologythatadoptedinthecontrollingsystemisgettingmoreandmoreimportant．Inrecentyears，withthedevelopmentofinternettechnology,theremotediagnosis

4、technologyforcontrolsystemisrequired，therichdiagnosistechniqueresourcescouldbefullyusedacrossdifferentareas，andtheinformationcouldbeexchangedquickly,hencethespeedofdiagnosiscouldbeaccelerated，andtheproblemscouldbeeffectivelyandtimelysolved．Thepaperfirstlyintroducesthebasic

5、concepts，includingthedefinitionofthefault，themissionsofthefaultdiagnosis，etc．Secondly,thepapermainlyanalyzesthemethodsandfeaturesofthedifferentfaultdiagnosises，besideofthat，itmainlyintroducestheexpertsystemwhichisoneofthemostwidelyusedmethodsinthefaultdiagnosisfield．Bystim

6、ulatingthethinkingmodeoftheexperts，theexpertsystemdesignedouttheintelligentprogramsaccordingtotheexperienceoftheexperts，onthepurposeofsolvingsomecomplexfaults．Aimingatthedefectsoftheexpertsystem，suchasthelowmaintainingandreasoningcapabilityingettingexpertise，thispaperpropo

7、sesthattheneutralnetworkcouldbeintroducedtoimprovetheexpertsystem．Astheself-leaming，IIIassociativememory,distributiveparallelprocessingoninformation，etcarethefeaturesoftheneutralnetwork，thedefectoftheexpertsystemhadbeenimproved．Thentheproposalsofimplementingtheremotefaultd

8、iagnosissystemarediscussedinthepaper．Thereal-timeremotefaultdiagnosissystemwhichisestabli