火卫二动力学模型与精密定轨研究OA北大核心CSTPCD

This paper comprehensively considers factors influencing the motion of Deimos,such as the two-body motion model between Deimos and Mars,Mars'gravity field,the three-body perturbation from major celestial bodies in the solar system,general relativity effects,Martian solid tides,and the libration of Deimos.A dynamical model for Deimos is established,and the methodology of precise satellite orbit determination,originally de-signed for artificial satellites,is extended to the natural satellite Deimos.Additionally,an adjustment model for fitting dynamic model data is developed.In the process of model estab-lishment,this paper compares the computational efficiency of three mainstream integration algorithms in orbital research,namely the 8-order Runge-Kutta-Fehlberg(RKF),12-order Adams-Bashforth-Moulton,and Gauss-Radau methods when solving Deimos'orbit.Simul-taneously,a comparison is made between the results obtained using the complete general relativity model and a simplified relativistic model that treats Deimos'orbit as circular.Nu-merical experimental results indicate that the established dynamical model and adjustment model for Deimos are stable and reliable.Moreover,under equivalent experimental condi-tions,the computational accuracy of the three integration algorithms is comparable,with the 12th-order Adams-Bashforth-Moulton method demonstrating the highest computation-al efficiency.The results from both relativistic models are comparable,and the simplified model can be directly utilized when considering computational efficiency.This work lays the foundation for the subsequent development of a new dynamical model for Martian satellites,incorporating complete rotation,and the construction of accurate Deimos ephemerides.