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SCIENTIA SINICA Informationis, Volume 46, Issue 9: 1339-1356(2016) https://doi.org/10.1360/N112015-00172

Hypersonic entry guidance design based on three-dimensional equilibrium glide space

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  • ReceivedOct 28, 2015
  • AcceptedDec 26, 2015

Abstract

Three-dimensional entry corridors and three-dimensional equilibrium glide space concepts subject to path constraints are proposed in this paper for the first time. The three-dimensional entry corridors including H-V-$\alpha$ (altitude-velocity-attack angle) space and D-V-$\alpha$ (drag-velocity-attack angle) space are obtained offline within which the entry vehicle flights will observe inequality path constraints. The $\alpha$ (bank angle-velocity-attack angle) three-dimensional equilibrium glide space is achieved based on quasi-equilibrium glide condition. The pivotal trait of this three-dimensional equilibrium glide space concept is that it is capable of successfully converting inequality path constraints consisting of heating rate, dynamic pressure and load into control variable constraints which are bank angle and attack angle. The advantages and potential applications are investigated and presented in this paper. The proportional terminal guidance law is introduced in the entry guidance which can fulfill the integrated design of entry guidance and terminal guidance through applying the 3D equilibrium glide space. The robustness and adaptiveness of the proportional guidance law based on 3D equilibrium glide space are verified through simulations


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