多星机动接近威胁下航天器反包围规避方法

Under the threat of multi-spacecraft maneuvering approach,an encirclement threat avoidance strategy is proposed based on the orbital element reachable set. Firstly,the solving procedure of the orbital element reachable set for low-thrust spacecraft is given. Then,the minimum time of flight for incoming spacecraft maneuvering to threaten the target spacecraft is calculated in the orbital element phase plane,and the threat potential field and threat area are obtained accordingly. Afterward,the encirclement threat scenario is defined based on the threat direction of incoming spacecraft to the target spacecraft. Finally,the anti-encircling constraint and evaluation indexes of evasive maneuver are established, and the optimal encirclement threat avoidance maneuver strategy is given. The simulation results show that the defined encirclement threat scenarios are reasonable,and the proposed method enables the target spacecraft to avoid encirclement threats posed by multiple incoming spacecraft and save fuel consumption.