空间交会最终平移轨迹安全模式设计

追踪航天器在制导机动失效后的飞行轨迹的安全性,是最终平移段标称轨迹设计的主要依据。被动安全模式设定较低的逼近速度,可避免制导机动失效后两星碰撞,但飞行时间较长;主动安全模式设置避撞机动,确保制导机动失效后飞行安全,其逼近速度大于被动安全模式,可缩短飞行时间。本文以 V-bar逼近为例,对以目标航天器质心为中心的长方体飞行禁区与球形飞行禁区,给出被动安全模式与主动安全模式及其避撞机动的设计方法。

Safety Mode Design of Final Translation Trajectories of Space Rendezvous

The safety mode design of final translation trajectories of space rendezvous is investigated in this paper. The passive safety mode takes appropriately smaller approach velocity and can avoid the collision between the chaser and the target vehicle, in the case of guidance maneuver failure. And the active safety mode with CAM (collision avoid maneuver) can shorten the translation time. Approach velocity profiles and the CAM velocity-increment are given for the +V-bar approach, where a target-centered cuboid or spheroid is taken as "flight-forbidden-zone".