Study on spacecraft formation capture control method based on disturbance observer

Xiaolong Wang,Chong Sun,Shuo Song,Qi Li,Qun Fang

doi:10.1051/jnwpu/20213951012

Abstract

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.

Highlights

Study on spacecraft formation capture control method based on disturbance observer
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
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 colli⁃ sion avoidance function is designed

Summary

Introduction

体系 Ft 中的投影;l1 - l3 是正常数,其值影响路径约束的尺寸;e1 与 e2 的值影响圆柱体的外形。 Cosh -2( k3,i ve,i ) ( - mc Cm,i ve,i - mc nt,i + f′d,i ) + 将(40) 式代入(41) 式,则有 􀭴fd,i = ḟd,i + kp,i^fd,i - kp,i fd,i = ḟd,i - kp,i􀭴fd,i (42) K2,i k3,i cosh k3,i ve,i κi ) ρe,i κi ρe,i ) mc + fd,i ] + 􀭴fTd,i( ḟd,i - kp,i􀭴fd,i )

Results

Conclusion