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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2018, Vol. 39 ›› Issue (12): 322558-322558.doi: 10.7527/S1000-6893.2018.22558

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

Reentry trajectory planning and guidance method based on inverse drag acceleration

HUANG Hanbin, LIANG Luyang, YANG Ye   

  1. Beijing Aerospace Automatic Control Institute, Beijing 100854, China
  • Received:2018-07-20 Revised:2018-08-13 Online:2018-12-15 Published:2018-10-31

Abstract: To address the entry guidance problem for the lifting vehicle, an online analytical planning and guidance method for the reentry trajectory based on the inverse drag acceleration corridor is proposed. The path constraints and terminal constraints are transformed into the inverse drag acceleration corridor described by cubic spline functions. Since the range-to-go is approximately linear in the inverse corridor, the feasible drag acceleration profile is solved analytically and updated linearly with the boundary of inverse drag acceleration. For the longitudinal tracking guidance, the guidance law (the magnitude of the bank angle) is calculated by the dynamic error characteristic of drag acceleration. For the lateral guidance, azimuth deviation is restricted by the bank angle reverse. The fast generation and update of reentry trajectory are realized online, and the method is combined with the tracking guidance technique by using the dynamic characteristics of drag acceleration. The proposed method has high computational efficiency and strong adaptability, showing potentials for engineering application.

Key words: entry flight, inverse drag acceleration, trajectory planning, trajectory update, tracking trajectory

CLC Number: