Volume 39, Number 5, October 2021
|Page(s)||1012 - 1021|
|Published online||14 December 2021|
Study on spacecraft formation capture control method based on disturbance observer
School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China
2 Xi'an Modern Control Technology Research Institute, Xi'an 710065, China
In the presence of compound disturbances, a multi-spacecraft cooperative collision avoidance capture control method based on disturbance observer was proposed, which can solve the problem of low speed rolling non-cooperative target close-range capture in space. Firstly, a relative motion model of attitude and orbit coupling is established. Secondly, the disturbance observer is used to estimate and cancel the compound disturbance in the capture process. At the same time, the hyperquadric surfaces are used to describe the shape of space non-cooperative targets and capture spacecraft to establish a composite artificial potential field, and a robust control law with collision avoidance function is also designed. Finally, the stability of the controlled system is proved by using Lyapunov function, and the collision avoidance performance of the system is analyzed. Numerical simulations are carried out to evaluate the effectiveness of the proposed control scheme.
Key words: spacecraft formation / disturbance observer / cooperative collision avoidance control / non-cooperative target capture
关键字 : 航天器编队 / 干扰观测器 / 协同避碰控制 / 非合作目标抓捕
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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