Non-Cooperative Target Approach Strategy Design Based on Bearing-only Measurement

In view of the challenge in obtaining accurate relative navigation information during the close-range guidance phase of space non-cooperative target approaching missions, making it difficult to achieve high-precision rapid approach control, this paper proposes an approaching control strategy for close-range guidance based on bearing-only measurement for non-cooperative target approaching. Firstly, the relative orbital motion dynamic model between the mission satellite and the non-cooperative target is established, and the mission scenario is defined. Subsequently, a close-range guidance control strategy is designed based on bearing-only measurement. The lateral control law of the mission satellite is devised through the deviation of the target’s elevation and azimuth angles. Moreover, the course control law is designed based on the initial and desired position relative to the target, thereby achieving rapid linear approach control of the target. Finally, a comparative simulation is conducted with traditional methods involving bearing-only navigation combined with real-time closed-loop control. The simulation results demonstrate that the proposed approach outperforms traditional methods in terms of energy consumption, accuracy, and transfer time, validating the superiority and practical value of the method in engineering applications.