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1、英语资料及译文AboutPIDcontrolRecentlyautomationtechnologyisbasedontheconceptoffeedback.Elementsoffeedbacktheoryconsistofthreeparts:measurement,comparisonandimplementation.Measurementvariablesofconcern,comparedwithexpectations,withthecontrolsystemtocorrecttheerrorresponse.Thetheoryandapplicati
2、onofautomaticcontrol,thekeyistomakethecorrectmeasurementandcomparisonofhowbesttorectifythesystem.PID(proportional-integral-differential)controllerasthefirstpracticaluseofthecontrollermorethan50yearsofhistory,isstillthemostwidelyusedindustrialcontroller.SimplePIDcontroller,theuseofthesy
3、stemdoesnotaccuratelymodelaprerequisitethattheyhavebecomethemostwidelyusedcontroller.PIDcontrolleristheproportionofcells(P),integralunit(I)andthedifferentialunit(D)component.Becauseofitswiderangeofuses,theuseofflexible,hasbeenserializedproducts,theuseofonlythreeparameterssetting(Kp,Tia
4、ndTd)canbe.Inmanycases,doesnotnecessarilyneedallthreemodules,whichcantake1-2unit,buttheproportionofthecontrolunitisessential.Firstofall,PIDbroadrangeofapplications.Althoughmanyindustrialprocessesortime-varyingnon-linear,butcanbesimplifiedthroughtheirbasicnon-linearanddynamiccharacteris
5、ticsofthesystemovertime,sothatyoucancontrolthePID.Secondly,PIDparametercantuneeasier.Thatis,PIDparametersKp,TiandTdcanbebasedonthedynamiccharacteristicsoftheprocessofsettingatimelymanner.Ifthedynamiccharacteristicsoftheprocessof13change,forexample,changesmaybecausedbytheloaddynamicchar
6、acteristicsofthesystemchanges,PIDparameterscanbere-tuning.Third,PIDcontrollerinpracticeistobeimprovedcontinuously,thefollowingaretwoexamplesofimprovements.Infactories,wealwaysseealotofloopsareinmanual,andbecauseofthedifficultyofthecoursesothatthe"automatic"mode,asmoothworking.Asaresult
7、ofthesedeficiencies,theuseoftheindustrialcontrolsystemPIDisalwayssubjecttoproductquality,safety,wasteproductionandenergyproblems.PIDparameterself-tuningPIDparametersinordertodealwiththisproblemsettinggenerated.Now,theauto-tuningorself-tuningofPIDcontrollerisabusinesssingle-loopcontro
