气动-引力辅助轨道机动相对于独立的引力辅助轨道机动而言能实现更大更灵活的速度偏转角同时减少燃料消耗。利用拟谱法设计出开环最优轨迹。对于飞行过程中的制导问题,根据拟谱法实现速度快结果精确的优点,将飞行时间按照等距及变间距分段,对每个独立时段采用实时在线轨迹生成的方法得到这一时间范围的最优轨迹,通过不断的轨迹更新实现飞行中对参数扰动等因素的抑制作用,结果显示采用变间距节点对干扰抑制效果有所增强。同时采用预留时间裕度的方式,可以较好地解决制导过程中在线最优化轨迹生成所需少量计算时间导致的制导偏差问题。 Pneumatic - Gravitational-assisted orbital maneuvering enables greater and more flexible speed deflection angles than standalone gravitational-assisted orbital maneuvers while reducing fuel consumption. Design the open-loop optimal trajectory by using the method of pseudospectral. For the guidance problem in the process of flight, according to the advantage of high precision and quick result of the pseudospectral method, the time of flight can be obtained by real-time on-line trajectory generation according to the equidistant and variable pitch segments. The optimal trajectory is achieved through the continuous trajectory updating, which can restrain the disturbance of parameters such as parameter disturbance in flight. The results show that the interference suppression effect is enhanced by using variable pitch nodes. At the same time, by adopting the way of reserving the time margin, the guidance deviation caused by a small amount of calculation time required for the on-line optimization trajectory generation in the guidance process can be well solved.