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1、哈爾濱工業(yè)大學(xué)工程碩士學(xué)位論文AbstractInthe21stcentury，Low-thrustpropulsionsystemhasbecomeonekeytechnologyinthefieldofdeepspaceexploration.Ithasalotofadvantages,suceashighspecificimpulse,lightweightandhighcontrolaccuracye.Itcangreatlyreducethefuelconsumptionduringthelong-distanceexp
2、lorationmissions.Itwillbeoneofthemaindevelopmentdirectionofthedeepspacetransfertrajectories.Currently,manycountriesandaerospaceagencyhavecompletedanumberofdeepspaceexplorationmissionsbyusinglow-thrustpropulsionsystem.Inthispaper,thepreliminarydesignandoptimizationoflo
3、w-thrusttrajectoryarestudiedindepthbasedonthefeaturesofthedesignofdeepspacetransfertrajectory.First,somebasictheoriesaboutlow-thrusttrajectoriesdesignareintroduced,includingtheephemerisofplanetsandasteroids,thetrajectorydynamicalmodelsandsoon.Besides,someperturbationm
4、adelsandlowthrustpropulsionsystemareresearched.Secondly,theinitialdesignofthelow-thrusttransfertrajectoryareresearcheddeeply.BasedonFFStheories,asignificantmethodispresented.Thejobsdoneherearepreparedforthefollowingtask.Then,theindirectshootingmethodandevolutionaryneu
5、rocontroloptimizationalgorithmareresearcheddeeply.Basedonthetwoalgorithms,theinitialtrajectoriesdesignedaboveareoptimized.Afterthat,theadvantagesanddisadvantagesofsuchoptimizationalgorithmsareanalysed.Finally,basedonthemethodsstudiedinthispaper,theexplorationmissionof
6、Mercuryisresearched.Firstofall,theinitialmissiontrajectoryisdesigned.Thensometaskswillbedonetooptimizetheinitialow-thrusttrajectory.Afterthis,aoptimaltrajectorywillbeobtained.Keywords:deepspaceexploration,low-thrusttransfer,finiteFourierseries,indirectshootingmethod,e
7、volutionaryneurocontrolII哈爾濱工業(yè)大學(xué)工程碩士學(xué)位論文目錄摘要.................................................................................................................................IAbstract......................................................................................
8、........................................II目錄................................................................................
