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1 results

  • Predictor corrector algorithms considering multiple constraints for entry vehicles

  • W. J. Zhang, B. M. Wang
  • Journal:
    The Aeronautical Journal / Volume 126 / Issue 1305 / November 2022
    Published online by Cambridge University Press:
    16 March 2022, pp. 1874-1896

  • This paper proposes an online entry trajectory planning based on predictor corrector algorithm that satisfies terminal constraints, path constraints and geographic constraints for lifting-body entry vehicles. The vehicle is considered as a 3DOF point mass. A piecewise linear bank profile in the altitude-versus-velocity (H-V) plane is used to project the longitudinal trajectory and a heading angle corridor-based bank angle reversal logic is designed to satisfy the geographic constraints simultaneously. The algorithm in longitudinal plane solves the problem of the mismatch between terminal range and height and the algorithm in lateral plane satisfies the no-fly zone constraint. Simulation results with the CAV-H model show that the proposed algorithm can generate entry trajectories satisfying multiple constraints and has certain robustness.