Virtual Terminal-Based Adaptive Predictor-Corrector Entry Guidance

Zixuan Liang*, Qingdong Li, Zhang Ren

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

An adaptive predictor-corrector guidance algorithm is presented to improve the performance of atmospheric entry guidance. In the predictor, a virtual entry terminal (VET) is employed instead of an actual terminal to reduce the computational request. The VET is adaptively selected from a reference trajectory according to the vehicle's authority to cancel disturbances; thus, it is reachable by the vehicle in different cases. In the corrector, an effective modification method for the bank angle and the angle of attack is designed. With the predictor-corrector algorithm, the vehicle is able to reach the VET. After the VET, a reference trajectory tracking law is employed to fly the vehicle to the actual entry terminal. The adaptive entry guidance method is verified using Monte Carlo simulations. A comparison with the conventional predictor-corrector algorithm shows that the computation time is significantly reduced by employing the VET in the adaptive algorithm.

Original languageEnglish
Article number04017013
JournalJournal of Aerospace Engineering
Volume30
Issue number4
DOIs
Publication statusPublished - 1 Jul 2017
Externally publishedYes

Keywords

  • Adaptive guidance
  • Atmospheric entry
  • Predictor-corrector
  • Trajectory tracking
  • Virtual entry terminal

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