BjornEriksson_Control_Strategy_for_Energy_Efficient_Fluid_Power_Actuators

《BjornEriksson_Control_Strategy_for_Energy_Efficient_Fluid_Power_Actuators》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、Link¨opingStudiesinScienceandTechnologyThesisNo.1341ControlStrategyforEnergyEfficientFluidPowerActuatorsUtilizingIndividualMeteringBj¨ornErikssonItsallaboutefficiencyLIU-TEK-LIC-2007:50DivisionofFluidandMechanicalEngineeringSystemsDepartmentofManagementandE

2、ngineeringLink¨opingsUniversitetSE–58183Link¨oping,SwedenLink¨oping2007ControlStrategyforEnergyEfficientFluidPowerActuatorsUtilizingIndividualMeteringLinköpingStudiesinScienceandTechnologyThesisNo.1341ControlStrategyforEnergyEfficientFluidPowerActuatorsUtil

3、izingIndividualMeteringBjörnErikssonLIU-TEK-LIC-2007:50DivisionofFluidandMechanicalEngineeringSystemsDepartmentofManagementandEngineeringLinköpingUniversitySE58183Linköping,SwedenLinköping2007ISBN978-91-85895-06-9ISSN0280-7971LIU-TEK-LIC-2007:50Copyrightc

4、2007byBjörnErikssonDepartmentofManagementandEngineeringLinköpingUniversitySE-58183Linköping,SwedenPrintedinSwedenbyLiU-Tryck,Linköping,2007.TomyFamily"Detgällerinteattfyllalivetmedårutanårenmedliv."OkändAbstractThisthesispresentsasolutionenablinglowerloss

5、esinhydraulicactuatorsystems.Amobilefluidpowersystemoftencontainsseveraldifferentactua-torssuppliedwithasingleloadsensingpump.Oneofthemainadvantagesistheneedofonlyonesystempump.Thismakesthefluidpowersystemcompactandcost-effective.Ahydraulicloadoftenconsists

6、oftwoports,e.g.motorsandcylinders.Suchloadshavetraditionallybeencontrolledbyavalvethatcontrolstheseportsbyonesinglecontrolsignal,namelythepositionofthespoolinacon-trolvalve.Inthiskindofvalve,theinlet(meter-in)andoutlet(meter-out)orificesaremechanicallyconn

7、ected.Themechanicalconnectionmakesthesystemrobustandeasytocontrol,atthesametimeasthesystemlacksflexi-bility.SomeofthemaindrawbacksareThefixedrelationbetweentheinletandoutletorificesinmostapplicationsproducetoomuchthrottlingattheoutletorificeundermostoperating

8、conditions.Thismakesthesysteminefficient.Theflowdirectionsarefixedforagivenspoolposition;therefore,noenergyrecuperationand/orregenerationabilityisavailable.Inthisthesisanovelsystemideaenabling,forexample,recuperationan