Analysis of the effect of launch area gravity disturbance on spacecraft guidance accuracy

Abstract Disturbance gravity is an important error source that affects the guidance accuracy of spacecraft, and the improvement of guidance accuracy is of great significance for improving the damage efficiency of spacecraft. Although this problem has become a hot topic in current research, the influence mechanism of disturbing gravity on guidance accuracy and its quantitative description still needs to be further summarized in typical guidance modes. In this paper, the influence mechanism of the disturbance gravity of the launch area on the guidance accuracy of the spacecraft in the perturbation guidance and closed-loop guidance modes is systematically analyzed, and the fall-point deviation of the spacecraft under the disturbance gravity of the launch area in two typical guidance modes is quantitatively calculated by simulation. The results show that disturbing gravity has a significant influence on the guidance accuracy of spacecraft, and the influence degree is different under different guidance modes. The research in this paper verifies the necessity of an in-depth study of disturbing gravitational fields to improve the guidance accuracy of spacecraft and lays a foundation for proposing effective compensation measures to improve the guidance accuracy of spacecraft.