基于遗传算法的液压压上系统的PID优化仿真分析

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1、机床与液压Sep．2013HydromechatronicsEngineeringV01．41No．18DOI：10．3969／j．issn．1001-3881．2013．18．030SimulationAnalysisofPIDOptimizationofHydraulicPressureSystemBasedonGeneticAlgorithmXUXiufenMechanicalandElectricalEngineeringInstitute，XinxiangUniversity，Xinxiang453003，ChinaAbstract：Inordertoimprovet

2、hedynamiccharacteristicsofcoldrollingtempermillhydraulicpres-suresystem，anewPIDparametercontrolmethod—geneticalgorithmwasproposed．ByusingMATLAB／SIMULINKsoftwaretosolvetheoptimizationmode1．thePIDcontrolparameterself-tun-ingwasachieved．TheoptimizedPIDparametersandZ-NtuningPIDcontrolefectswerec

3、om‘paredandtheresultsshowedthat：thegeneticalgorithmPIDcontrolismuchbetterthanthatoftheZ-NtuningPIDcontro1．Furtherm0re．thefeasibilityandpracticalityofthegeneticalgorithmwereverifiedaswel1．Keywords：geneticalgorithm，PID，hydraulicpressuresystem，optimization，simulationwhichdoesnotrequirethefuncti

4、oncontinuityandnot1．Introductionrequirethefunctiondiferentiable．Therefore，therearesomeadvantagestousegeneticalgorithmtoadjustAccordingtothemaincharacteristicsofmodernthehydraulicpressuresystemofPIDparameters．steelrollingproduction，inordertomeettherequire-mentsofthetension，position，speedandpr

5、essure2．ThemathematicalmodelofAPCsystemcontrolinrealapplications，theflatmachineadoptshydraulicpressuresystemcontrol(APe)mode[1]．APCsystemisoneofthemainparto±temperTheconventionalZ．N『2—3]tuningPIDcontrolmil1．andismainlycomposedofelectro—hydraulicwerefeedbackcorrectionofpositioncontrolsystem，s

6、ervovalve，hydrauliccylinder，sensor，controllerpressurecontrolsystem．Althoughithastheeffecttoandamplifier，supplypipe，oilreturnpipeetc．Thecontroldynamiccharacteristicsofthesystem．agen-mainfunctionofthehydraulicpressuredeviceistoeralPIDcontrollerofproportion，integralanddiffer-corecttheshape，impr

7、ovethemechanicalpropertiesentialneedsthreeparameterstotuneordebug．Itisandthesurfacequality．Positioncontrolisoneofthedi硒culttodeterminethedowntimeandtheworkloadbasicfunctionsofAPC．Theactuatorpositioncontrolisrelativelycumbersome．LimitationsofPIDcont