基于模糊权重的Fuzzy-PID控制系统研究.pdf

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1、Jun．2015HydromechatronicsEngineeringVO1．43No．12HydromechatronicsEngineeringhttp：／／jdy．qks．cqut．edu．cnE-mail：jdygcyw@126．tomResearchoffuzzy-PIDcontrolsystembasedonfuzzyweights(DepartmentofInformationandEngineering，TangshanCollege，Tangshan063000，China)Abstract：Aimingatmeritsandfaultsofcontrolsystem

2、betweentheclassicalfuzzyandPID，akindofFuzzy—PIDhybridcontrolsystemwassetup．LinearPIDcontrollerandfuzzycontrollerwerecombinedinparalle1．Thefuzzycontrolplaysamajorroleintheregionthatstraysfromworkpointdistantly．bycontraryP1Dlinearcontro1．Andaimingatfaultsofswitchaboutthresholdvalueandsinglefuzzyset

3、，thehybridcontrolsystembasedonfuzzyweightscontrollerisproposed．Simulationresultsshowthatthecapabilityofhybridcontrolsystembasedonfuzzyswitchisimprovedandincreased．Keywords：Fuzzyweights，Thresholdvalueswitch，Fuzzy—PIDdoi：10．3969／j．issn．1001-3881．2015．12．020Documentcode：ACLCnumber：TP273+．4limitcycle

4、oscillationneartheworkpoint『1]．There—1Introductionfore，takingtheiradvantagesintoaccount，akindofFuzzy—PIDhybridcontrolsystemisproposed．Conven—Becauseofadvantagesofsimplestructure，easytotionalfuzzy—PIDhybridcontrolsystemadoptsthresholduse，strongapplicability，maturityinstabilitydesignvalueswitchmode

5、，whichusesdifferentmodestorea1．andparametertuningmethod，uptonowPIDlinearizecontrolindifferencediscoursedomain．Conven—controlleroccupiesacertainpositionyetinsomecon-tionalfuzzy—PIDhybridcontrolalgorithmissimple，trolsystem．But，becauseofitslinearperformance，hasgoodreal-timeandfastresponse，alsocanavo

6、idofPIDlinearcontrollerhasgoodcontrolcapabilityonlysteadystateerroreffectively．Butdestabilizationexistsbesideworkpoint．Whenitisfarfromworkpoint，onswitching．Aimingattheproblemofswitch，manyowingtothenonlinearityofcontrolobject，itishardtopeoplemakeimprovementstorealizeswitchingwithoutkeepdynamicchar

7、acteristics．Sincefuzzycontrolwasdisturbance．Akindofimprovedadaptivefuzzy．PIDproposed，ithasbeenusedwidelyinindustrialcompoundcontrolwasproposedinreference[2]thatprocesscontro1．Oneofcharacteristicsaboutfuzzyainchingregul