›› 2012, Vol. 32 ›› Issue (6): 39-46.doi: 10.3780/j.issn.1000-758X.2012.06.006

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FootprintOptimizationforRLVBasedonMixOptimalAlgorithm

 LI  Hui-Feng, SUN  Guo-Qing, HE  Rui-Zhi   

  1. (SchoolofAstronautics,Beihang University,Beijing100191)
  • Received:2012-01-04 Revised:2012-02-05 Online:2012-12-25 Published:2012-12-25

Abstract: Amixoptimalalgorithmwiththebenefitsofbothglobalandlocalalgorithmswasproposedforfootprintoptimizationofreusablelaunchvehicle.Entryflightdynamicswasgiventodescribethefootprintproblem.Optimalbankanglecontrollawwasderivedbasedonthemaximumprincipleandtheconstraintsofthecontrolinputswerediscussed.Initialguessofparameterswasfoundedthroughgeneticalgorithms.Andthen,patternsearchmethodwasusedforrapidandpreciseparametersoptimization.Simulationresultsshowthattheproposedapproachprovidesaconvenientwayforrapidlyfindingfootprintwhileenforcingpathconstraintsandcontrolinputconstraints.

Key words: Reentryvehicle, Landingfootprint, Geneticalgorithm, Patternsearchmethod