基于地面定轨的火星大气制动轨道控制策略设计OA

The maneuver strategy of aerobraking in Mars orbit is discussed in the paper,with con-sideration of the practical engineering constraints of China Mars sample return project,including the walk-in phase,main braking phase,and walk-out phase.The discussions focus on the deter-mination of the upper and lower boundary of the periapsis altitude corridor,the procedure of orbit maneuver strategy determination,as well as the numerical simulation results for nominal orbit computation and error analysis.It is demonstrated that the proposed maneuver strategy is con-sistent with the mission goal of aerobraking,the safety margin is sufficient,and the maximum thermal flow constraint is well satisfied.Moreover,the mission goal can be achieved within the specified time range via optimal aerobraking orbit design.