Research on High Precision Autonomous Navigation Method of Cruise Phase of Deep Space Exploration Based on Observation Planning

The cruise phase of deep space exploration is one of the important stages of the small body exploration mission, and the autonomous navigation accuracy of the cruise phase will also be of great significance to the successful implementation of the subsequent small body exploration mission. Because the probe needs to determine its own state independently in the detection process, the calculation burden is large, so it is difficult to effectively achieve high navigation accuracy and meet the detection requirements. In response to the above problems, this paper constructs the autonomous navigation system model of the cruise phase of the deep space probe, analyzes the observability conditions of the system combined with the observability theory, and gives the quantitative index of autonomous navigation accuracy, so as to select the optimal combination of observation targets to make the navigation accuracy maximum. Finally, the small body detection is used as the background for simulation verification, and the simulation results prove the effectiveness of the proposed method.