Low-thrust spacecraft trajectory optimization via a DNN-based method

Shanshan Yin, Jian Li, Lin Cheng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Initial solution guess has a significant impact on the convergence of indirect methods, especially for continuous low-thrust trajectory optimization problems. In this study, an intelligent initial solution supplying approach based on deep neural networks (DNNs) is proposed to help achieve the fast generation of optimal trajectories for low-thrust orbit transfers. Energy-optimal and fuel-optimal trajectories with three different terminal conditions are considered. Based on the training dataset obtained by an indirect method, DNNs are constructed to approximate the solutions corresponding to different flight states. Based on the trained DNNs, an intelligent trajectory optimization method named DNN-based method is developed with the help of the homotopy technique. Numerical simulations are conducted to evaluate the performance of the proposed method on success rates and time consumptions. Simulation results demonstrate that the combination of traditional techniques and the new DNN technology can achieve the fast generation of low-thrust optimal trajectories with advantages on computational efficiency and reliability.

Original languageEnglish
Pages (from-to)1635-1646
Number of pages12
JournalAdvances in Space Research
Volume66
Issue number7
DOIs
Publication statusPublished - 1 Oct 2020

Keywords

  • Continuous low-thrust spacecraft
  • Deep neural networks
  • Indirect method
  • Trajectory optimization

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