›› 2016, Vol. 36 ›› Issue (3): 50-56.doi: 10.16708/j.cnki.1000-758X.2016.0032

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Avariable-fidelitysequentialoptimizationmethodforreentrytrajectoryofspaceplane

 ZHU  Jun-Jie, YU  Xiong-Qing*, LUO  Dong-Ming, WANG  Yu   

  1. KeyLaboratoryofFundamentalScienceforNationalDefense-AdvancedDesignTechnologyofFlightVehicle,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China
  • Received:2015-09-01 Revised:2015-11-11 Online:2016-06-25 Published:2016-02-24

Abstract: Avariable-fidelitysequentialoptimizationmethodforreentrytrajectorydesignofaspaceplanewasproposedtoincreaserobustnessandaccuracyoftheoptimization.Theoptimizationprocessconsistedofthreesteps.Firstly,  therewasapreoptimization,inwhichforacoarsediscretecase,theoptimalsolutionofdesignvariablesforeachdiscretizedpointwasobtainedbyusingahybridoptimizationmethod.Secondly,  initialvaluesofthediscretizedpointsinarefineddiscretecasewereobtainedbyusinglinearinterpolationfromthepre-optimizationsolution.Finally,thetrajectoryoptimizationintherefineddiscretecasewasconducted,andmoreaccurateoptimizationresultswereobtained.Ademonstrationexamplewasusedtovalidatetheproposedmethod.Theresultsindicatethatthereentrytrajectoryoptimizationproblemcanbesolvedrobustlywithsatisfiedaccuracyandlesscomputationalburden.

Key words: spaceplane, reentrytrajectory, optimization, hybridoptimization, interpolation