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毕业设计(或论文)说明书共21页1附录2AnIntegratedSystemforCommandandControlofCooperativeRoboticSystemsChristopherM.Clark,EricW.Frew,HenryL.Jones,&StephenM.RockAerospaceRoboticsLabDepartmentofAeronautics&AstronauticsStanfordUniversitychrisc,ewf,hlj,Abstract:Presentedisanexperimentalinvestigationintothreeissuesthatenableincreasedautonomousfunctionalitywhenusingmobilerobots.Theseissuesare(1)interfacingasingleuserwithmultiplerobots,(2)motionplanningformultiplerobots,and(3)robottrajectorygenerationfortargettracking.Forthisresearch,theMicroAutonomousRoverS(MARS)testplatformwasdevelopedthatprovidesameansforimplementingthistechnologyonlaboratoryrobotstocarryouttasksincludingcollision-freewhichasingleuserisabletocommandagroupofrobots.Experimentalresultsarepresentedinmotionandtargettracking.Keyword:multi-robotsroverMARStestplatformtargettrackingtrajectorymonitorMaintext:1.IntroductionCurrently,remoteroboticsystemsrequiremanyhumanstooperateasinglerobot.Thegoalforfuturesystemsistorequireonlyoneoperatorformanyrobots.Forexample,futurespacestructureconstructionwouldbenefitfromtheavailabilityofalargegroupofrobotsthatcanbeoperatedbyaFigure1:RoversfromtheMARStestplatform.Smallgroupsofhumans.Whiletherehasbeenasignificantamountofresearchtowardstheoperationofsingleremoterobots,moreworkisstillrequiredtowardstheoperationofgroupsofrobots.Inparticular,anincreaseddegreeofautonomymustbegiventotherobots.Torealizethisautonomy,avarietyoffundamentalcapabilitiesmustbeenabledthatinclude:毕业设计(或论文)说明书共21页2(1)Providinganinterfacefromwhichadequateinformationfordecision-makingisavailabletothehuman,andcommandstooneorseveraloftherobotscanbeexecuted.(2)Providingautonomous,real-timeconstructionofcollision-freetrajectoriesforallrobotsinthegroup.(3)Providingrobottrajectorygenerationthatenablestrackingofmovingobjects.Inpreviouswork,weaddressedeachoftheseissues:Jones6developedaninterfacethatallowsasinglehumantooperatemanyrobots;Clark2designedamulti-robotmotionplanner;andFrew4designedatrajectorygeneratorthatprovidesnear-optimalsolutionsforobjectmotionestimation.Figure1:RoversfromtheMARStestplantformInthispaper,wepresentanintegratedsystemdemonstrationofthesetechnologies.Thepaperisorganizedasfollows.Section2providesabriefdescriptionofeachofthethreeresearchprojects.InSection3,theMicroAutonomousRoverS(MARS)testplatformanditsapplicationtothisresearchisdescribed.Section4detailsafinaldemonstrationthatsummarizesthepreviousresearchasanintegratedsystem.ConclusionsarepresentedinSection5.2.TechnologicalIssues2.1.HumanInterfaceForasinglehumantooperateamulti-robotsystem,thehumanmusthaveaccesstoallrelevantinformationabouttheremoteenvironmentsothatappropriatecommandscanbeexecuted.Also,thehumanmustbeprovidedwithameansofexecutingthesecommandstooneorseveraloftherobots.In6,Jonesdevelopedaninterfacebasedondialoguesbetweenthehumanandtherobotsasaneffectivemethodforoperatingmultiplerobots.Inparticular,Jonesaddressedthefollowingissues:毕业设计(或论文)说明书共21页3-Establishingthestructureandscopeofthedialogue-Creatingarobotinfrastructurecapableofconductinganeffectivedialogue-Determiningmethodsfordealingwiththesocialconventionsofdialogues-Developinganinterfacethatallowstheoperatortocarryoutthedialoguewiththeroboticsystem.Hisresultisanimplementationofadialogueinteractionpatternedafterthetask-orientedDialoguescommoninhumanteams.Thehypothesisisthatsimilardialoguescanplayausefulrolewithinhuman-robotteams.TheinterfacewasimplementedusingOpenGLtoprovideathree-dimensionalviewoftherobotenvironment.Anexamplescreen-shotisshowninFigure2.Dialoguethroughtheinterfacetakesplaceelectronicallyratherthanthroughvoice.Thedialoguebeginswhenobjectsareselectedbyclickingonthemonthescreen.Theinterfacethenresolvestheidentityoftheobjectandtherobotthatsensedtheobject.Theinterfacewaitsuntilaresponsefromthecorrectrobothasbeenreturnedintheformofalistoftasksthattherobotcanaccomplishonthatobject.Thislististhendisplayedinadialogthatpopsupnexttotheobject.Theusercanselectfromthislistoftasks,andthecompletecommandofrobot/task/objectissenttotherobotforexecution.Figure2:Screenshotofthehuman-robotinterface.Thescreen-shotinFigure2providesanexampleoftheinterfaceinuse.Tworobots(denotedbywhitecylinders)and3objectsarelocatedonthetestbedworkspace.The毕业设计(或论文)说明书共21页4operatorhasqueriedtherobotagentstodeterminewhattaskscanbeperformedontheobjectattheleftsideofthescreen.Apop-upmenuhasappearedwithalistofthequeryresults.Jonesshowedthatitispossibletobuildadialogue-basedinteractionthatenablesthecontrolofmultiplerobots.Thisinteraction,asimplementedinavirtualthree-dimensionalworld,providedanintuitivepoint-and-clickmethodfordeterminingthecapabilitiesoftherobotintheappropriatecontext,andenabledtheoperatortoparticipateintheresourcemanagementandtaskplanningfortherobots.2.2MotionPlanningWhenlargegroupsofrobotsandmovingobstaclesareworkingtogetherwithinadesignatedarea,high-levelmotionplanningisrequiredtoavoidcollisions.Continuouscommunicationbetweenallrobotsmaynotbefeasible,andnosystemofsensorscanprovideglobalknowledge.Also,tofunctioninadynamicenvironmentwithmovingobstacles,thesystemmustbeabletoreactquickly.Forthistypeofmulti-robotsystem,amotionplannerthatdoesnotneedglobalknowledgeorhighbandwidthcommunication,butthatcanstillplaninreal-time,isrequired.AmotionplanningsystemthatmeetsthisrequirementwasdevelopedbyClark2.ThealgorithmpresentedwasbasedontheplannerdevelopedbyHsuandKindel5.TheirworkdemonstratestheuseofaKinodynamicRandomizedMotionPlannerforasinglerobotmaneuveringaroundstationaryandmovingobstacles.Tohandlemorethanonerobot,theKinodynamicRandomizedMotionPlannerwasextended.Intheextend
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