简介：On-orbitservicespacecraftorbitproblemhasbeenaddressedfordecades.Theresearchofon-orbitservicespacecraftorbitcanberoughlydividedintoorbitdesignandorbitoptimization.Thepapermainlyfocusesontheorbitdesignproblem.Wesimplysummarizeofthepreviousworks,andpointoutthemaincontentoftheon-orbitservicespacecraftorbitdesign.Weclassifycurrenton-orbitservicespacecraftorbitdesignproblemintoparking-orbitdesign,maneuvering-orbitdesignandservicing-orbitdesign.Then,wegiveadetaildescriptionofthethreespecificorbits,andputforwardourownideasontheexistedachievements.Thepaperwillprovideameaningfulreferencefortheon-orbitservicespacecraftorbitaldesignresearch.

简介：Stationkeepingmode(SKM)forAttitudeOrbitControlSubsystem(AOCS);itisanoperationalapproachregardingtheattitudedynamicscontrol.Theessentialfeaturesofthedesignmethodologyisresearchingthebasictheoryandthenafterwards,makeaniterativedesignapproachusingsomepremise/assumptions,implementingthesystemsimulationthroughtheSimulinkMatlabsoftwarepackage,designingtherequiredcontrollers,monitorandanalyzingtheresponsesuntilthedesigngivethebestresultswithintherangerequired.Firstlythethrusterconfigurationisdesignedtoacquiretheparametersofthetorqueonthesatellite.Next,thecontrollersarebasedonthewellknownPIDcontrollaw.ControllersoptimizetheattitudeandareusedduringthemaneuversforSKM.Afterwardsthesimulationresultsaregiven,andpresentedtodemonstratetheperformanceandvalidityoftheAOCSdesignapproach.FinallythesimulationresultsdemonstratethatalltherequirementswereaccomplishedandtheStationKeepingModewassuccessfullydesigned.

简介：Orbit7120条码扫描器是霍尼韦尔公司扫描与移动技术部的明星产品之一，自2000年在中国上市以来，深得广大中小零售商的喜爱，截至目前在中国的销量就已高达五十万台，占全球销量的一半，是市场上同类产品中的销量冠军。