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Quasi-equilibrium glide adaptive guidance for hypersonic vehicles

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Abstract

The entry-glide guidance strategy for hypersonic vehicles that can satisfy both terminal and path constraints is investigated in this paper. We propose a quasi-equilibrium glide adaptive guidance methodology based on the quasi-equilibrium glide condition (QEGC), which innovatively utilizes the quasi-equilibrium glide phenomenon in lifting entry. With the aid of QEGC, both range and terminal velocity can be predicted analytically with high precision. The path constraints are converted into angle of attack constraints, which has been difficult to realize by using traditional predictive guidance methods. The algorithm is independent of the standard trajectory. All the guidance commands, including the bank angle and the angle of attack, are calculated analytically in real time, which endows the algorithm with sufficient adapbility. The results of a CAV-H vehicle guidance test show that the algorithm leads the vehicle along a quasi-equilibrium glide trajectory satisfying both the terminal and path constraints and has sufficient flexibility for occasional mission changes. Furthermore, the robustness of the guidance algorithm under disturbances is validated through a Monte Carlo simulation.

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Authors and Affiliations

  1. College of Aerospace and Material Engineering, National University of Defense Technology, Changsha, 410073, China

    MingLiang Xu, KeJun Chen, LuHua Liu & GuoJian Tang

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  1. MingLiang Xu
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  2. KeJun Chen
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  3. LuHua Liu
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  4. GuoJian Tang
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Correspondence to GuoJian Tang.

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Xu, M., Chen, K., Liu, L. et al. Quasi-equilibrium glide adaptive guidance for hypersonic vehicles. Sci. China Technol. Sci. 55, 856–866 (2012). https://doi.org/10.1007/s11431-011-4727-z

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  • DOI: https://doi.org/10.1007/s11431-011-4727-z

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