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Phugoid dynamic characteristic of hypersonic gliding vehicles

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Abstract

This paper focuses on the phugoid dynamic characteristic of hypersonic gliding vehicle. By regarding equilibrium glide as the fixed state of reentry trajectory, the dynamic equations are simplified and a hyper-geometric equation with a forcing function is deduced. Linearization theory is applied to analyze the characteristic of the motion, and the phugoid mode is found to be stable. An analytical solution of flight path angle as a function of speed is derived based on General Multiple Scale theory. The dynamic characteristic is analyzed, and the analytic solution is found to be in good agreement with the numerical simulation. When the initial states do not satisfy equilibrium glide condition or perturbation occurs, a damped oscillation along the equilibrium glide trajectory would occur. The damping diminishes as the speed decreases. The number of oscillations is decided by the lift-to-drag ratio, the initial altitude and the initial/final speed.

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Authors and Affiliations

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

    XiaoQing Chen, ZhongXi Hou, JianXia Liu & XiaoQian Chen

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  1. XiaoQing Chen
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  2. ZhongXi Hou
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  3. JianXia Liu
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  4. XiaoQian Chen
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Correspondence to XiaoQian Chen.

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Chen, X., Hou, Z., Liu, J. et al. Phugoid dynamic characteristic of hypersonic gliding vehicles. Sci. China Inf. Sci. 54, 542–550 (2011). https://doi.org/10.1007/s11432-011-4196-9

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  • DOI: https://doi.org/10.1007/s11432-011-4196-9

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