Open Loop Tuning Rules英文学习资料

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1、OpenLoopTuningRulesBasedonapproximateprocessmodelsProcessReactionCurve:Theprocessreactioncurveisanapproximatemodeloftheprocess,assumingtheprocessbehavesasafirstorderplusdeadtimesystem.Theprocessreactioncurveisidentifiedbydoinganopenloopsteptestoftheprocessandidentifyingprocessmodelparameters.·P

2、utthecontrollerinmanualmode·Waituntiltheprocessvalue(Y)isstableandnotchanging·SteptheoutputofthePIDcontroller-Thestepmustbebigenoughtoseeasignificantchangeintheprocessvalue.Aruleofthumbisthesignaltonoiseratioshouldbegreaterthan5.·Collectdataandplotasshownbelow.·Repeatmakingthestepintheopposited

3、irection.Change_in_Process_Value·K=theprocessgainK=Change_in_Manipulated_ValueAdvancedProcessControl&OptimizationInc.2070N.RedwoodRoad,#5SaltLakeCity,UT84116(801)550-6101·Fax:(801)295-1701·e-mail:apcoinc@apco-inc.comOpenLoopTuningRulesZiegler-NicholsControllerTypeKctItD1ætöPç÷______Kèaø.9ætöPIç

4、÷3.33a___Kèaø1.2ætöPIDç÷2.0a0.5aKèaøRecommendedRangeofApplicability1.0<(a/t)<0.1Cohen-CoonControllerTypeKctItD1ætöé1æaöùPç÷ê1+ç÷ú______Kèaøë3ètøûéæaöù1ætöé1æaöùê30+3ç÷úPIç÷ê0.9+ç÷úaêètøú___Kèaøë12ètøûêæaöúê9+20ç÷úëètøûéæaöùê6-2ç÷ú1ætöé51æaöùètøPDç÷ê+ç÷ú___aêúKèaøë46ètøûêæaöúê22+3ç÷úëètøûéæaöùéù

5、ê32+6ç÷úêú1ætöé41æaöùètø4PIDç÷ê+ç÷úaêúaêúKèaøë34ètøûêæaöúêæaöúê13+8ç÷úê11+2ç÷úëètøûëètøûRecommendedRangeofApplicability1.0<(a/t)<0.1AdvancedProcessControl&OptimizationInc.2070N.RedwoodRoad,#5SaltLakeCity,UT84116(801)550-6101·Fax:(801)295-1701·e-mail:apcoinc@apco-inc.comOpenLoopTuningRules(Conti

6、nued)MinimumITAEControllerTypeTypeofResponseKctItD1.0840.49ætöPDisturbanceç÷______Kèaøt0.9160.586ætöPISetpointTrackingç÷éæaöù___Kèaøê1.03-0.165ç÷úëètøû0.9770.6800.859ætötæaöPIDisturbanceç÷ç÷___Kèaø0.674ètøt0.8550.9290.965ætöéæaöùæaöPIDSetpointTrackingç÷ê0.796-0.147ç÷ú0.308tç÷Kèaøëètøûètø0.9470.

7、7380.9951.357ætötæaöæaöPIDDisturbanceç÷ç÷0.381tç÷Kèaø0.842ètøètøRecommendedRangeofApplicability1.0<(a/t)<0.1Thingstowatchoutfor:(OpenLoopTuning)·Mosttuningruleshaveasuggestedrangeofapplicabilitybasedontheratioofa/t.Checktomakesure