根据两级入轨空天飞行器飞行特点,对一、二级上升轨迹进行了分段和分析,确定了一种两级入轨上升段轨迹形式,给出了采用自上而下、分段设计、参数化求解的上升轨迹设计流程,即由入轨点向发射点逐段设计,通过迭代计算确定轨迹参数。在两级入轨上升轨迹设计流程下,针对二级上升轨迹设计问题,建立了基于分级优化和牛顿迭代方法的二级上升轨迹设计方法,并通过仿真计算验证了方法简洁性、快速性、有效性。 According to the flight characteristics of two-stage orbiting airspeed spacecraft, the first and second ascending trajectories were segmented and analyzed, and a two-stage orbit trajectory model was established. The top-down and subsection design , Parameterized solution to the rising trajectory design flow, that is, from the track point to the launch point by paragraph design, iterative calculation to determine the trajectory parameters. Aiming at the problem of second-order ascending trajectory design, a two-level ascending trajectory design method based on hierarchical optimization and Newton’s iterative method is established under the two-stage ascending orbit trajectory design process. The simulation results show that the method is concise, rapid and effective Sex.