考虑轨迹安全的超快速交会逼近策略与控制

研究了考虑航天器交会逼近轨迹安全的超快速逼近策略和轨道控制方法。在超快速逼近方面,为了解决超快速逼近和轨迹被动安全的矛盾,提出瞄准偏置点概念。交会逼近时追踪航天器先以被动安全速度向瞄准偏置点快速逼近,再由瞄准偏置点向终端瞄准点逼近。在轨道控制方面,将超快速逼近过程中分别设计解耦后三通道的模糊控制器,对轨道各方向进行独立控制。仿真结果表明,在保证交会逼近过程安全性和逼近终端精度的前提下,文中方法不仅可以适应初始速度较大约束,而且可将交会逼近时间减少为传统逼近方法的20%。

Superfast final approach strategy and control considering trajectory safety

The paper studies the superfast final approach strategy and the orbit control method considering the approaching trajectory safety of spacecraft rendezvous. In the aspect of superfast final approach, in order to solve the contradiction between the superfast final approach and the passive safety of the trajectory, the concept of aiming bias point is proposed. When the rendezvous approaches, the chaser first approaches the aiming bias point with the passive safety speed, and then approaches the aiming point from the aiming bias point to the terminal aiming point. In the aspect of orbit control, the decoupled three channel fuzzy controllers are designed respectively in the superfast final approach, which can independently control all directions of the orbit. The simulation results show that under the premise of ensuring the safety of the final approach and approaching the terminal accuracy, the method can not only adapt to the constraint of the more initial speed, but also reduce the approach time to 20% of the traditional approach method.