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1、外文翻译TheliquidlevelcontrolsystembasedonddematlabsimulinkProcesscontrolisanimportantapplicationfieldofautomatictechnology,itistopointtothelevel,temperature,flowcontrolprocessvariables,suchasinmetallurgy,machinery,chemical,electricpower,etccanbewidelyused.Especiall
2、yliquidlevelcontroltechnologyinreallife,playedanimportantroleinproduction,forexample,thewatersupply,civilwatertoweriflowwaterlevels,canaffectpeople'slivesinwater;Industrialenterpriseswithwater,ifthedrainagewaterdrainageorcontrolledproperlyornot,inrelationtothework
3、shopofcondition;Boilerdrum,ifthecontrollevelboileristoolow,canmakelevelboileroverheating,possibleaccident;Jingflow,liquidlevelcontroltowercontrolaccuracyandlevelofthecraftcaninfluencethequalityoftheproductsandthecost,etc.Intheseproductionfield,arebasicallylaborstr
4、engthortheoperationhascertainrisknatureofwork,extremelypronetoaccidentscausedbyoperatingerror,thelosses,killingmanufacturer.Visible,inactualproduction,liquidlevelcontrolaccuracyandcontroleffectsdirectlyaffectthefactoryproductioncostandeconomicbenefitofsafetycoeffi
5、cient.EvenequipmentSo,inordertoensuresafety,convenientoperation,youhavetoresearchthedevelopmentofadvancedlevelcontrolmethodsandstrategies.Thegraduationdesigntopicistheliquidlevelcontrolsystembasedonddematlabsimulinkforcecontrol,Amongthemwascontrolledobjectforta
6、nklevel,CommunicationmodeforDDEcommunications,Matlabismainlyusedinthesimulationtest,Andforcecontrolsoftwareusedformodeling,Thissystemmainlythroughcombinationofhardwareandsoftwaredevicetoachieveprecisecontrolofliquidlevel,Inmodernindustrylevelcontrolofimportantcomp
7、onent,itinfluenceuponproductionnotallowtoignore,inordertoensuresafetyinproductionandtheproductqualityandquantity,thelevelandperformeffectivecontrolisverynecessary,Thefollowingisadescriptionofallaspects:一PIDcontrollerAproportional–integral–derivativecontroller(PIDc
8、ontroller)isageneric.controlloopfeedbackmechanismwidelyusedinindustrialcontrolsystems.APIDcontrollerattemptstocorrecttheerrorbetweenameasuredprocessvari