Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (1): 221-233.doi: 10.12305/j.issn.1001-506X.2023.01.26

• Guidance, Navigation and Control • Previous Articles    

An intelligent trajectory prediction algorithm of reentry glide target based on control parameter estimation

Mingjie LI, Chijun ZHOU, Humin LEI, Lei SHAO, Changxin LUO   

  1. Air Defense and Anti-Missile College, Air Force Engineering University, Xi'an 710051, China
  • Received:2021-09-09 Online:2023-01-01 Published:2023-01-03
  • Contact: Chijun ZHOU

Abstract:

Trajectory prediction of reentry glide target is a difficult and significant technology. The existing prediction methods obtain predicted trajectory by fitting control parameters' temporal variation using simple function, by which fitting accuracy is not high and data association is insufficient. Aiming at that problem, an intelligent trajectory prediction algorithm based on control parameter estimation is proposed combined with long and short term memory networks. Firstly, through designing the fast trajectory generation algorithm, combined with the attack angle corridor model, a large number of maneuvering trajectories are quickly generated to consist of data sets. Then, the intelligent trajectory prediction framework is built, which includes the last point modification network, control parameters modification network and parameters prediction network. The variation laws of key control parameters are studied through data sets. Finally, the trajectories are predicted accurately by extrapolation combined with target's dynamic models. The simulation results show that the average error of spatial distance and max error of spatial distance of the proposed prediction algorithm are less than 1.4 km and 2.5 km under different maneuvering modes with a fast prediction speed, and the method has robustness to model uncertainties caused by atmospheric disturbances.

Key words: reentry glide target, control parameters, long and short term memory networks, trajectory prediction

CLC Number: 

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