Safety trajectory control strategy for space autonomous proximity operations

Facing the safety flying problems that appear during space autonomous proximity operations, we present a safety trajectory control strategy, which is based on space vectors, for solving both collision avoidance and plume contamination avoidance. Firstly, new concepts of safety area and safety angle are defined; then the control parameters of collision avoidance and plume contamination avoidance are established and the criterion of collision avoidance, eq. (5) in the full paper, and that of plume contamination avoidance, eq. (9) in the full paper, are brought forward based on the control parameters. Finally, we present a safety trajectory control strategy which considers simultaneously both collision avoidance and plume contamination avoidance. Simulation results, given in Fig.4 in the full paper, indicate that the control parameters, criteria and safety trajectory control strategy can achieve the safety flying of spacecraft's proximity operations.