Evasion guidance of re-entry vehicle satisfying no-fly zone constraints based on virtual goals

Abstract

An evasion guidance method based on virtual goals is proposed for re-entry vehicles to avoid a no-fly zone. The guidance method combined with the Dubins curve path planning method and proportion guidance can effectively avoid the no-fly zone based on the maneuverability analysis of the re-entry vehicle. This method designed an energy-based motion model combined with the Quasi equilibrium glide conditions, enabling the prediction-correction guidance to correct the errors caused by evasion and meet the altitude as well as voyage constraints. The simulation shows that the evasion guidance method can effectively avoid the no-fly zone, meet the re-entry terminal constraints, and the algorithm is robust and adaptable.