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Adaptive Prescribed-time Control for Coupled 6-DOF Spacecraft Formation Flying
Li Chen,Yongyan Sun,Xiaowei Shao,Junli Chen,Dexin Zhang 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.2
This paper studies the prescribed-time spacecraft formation flying problem under known and unknown external disturbance. The coupled 6-degrees-of-freedom relative kinematics and dynamics for spacecraft are modeled by using exponential coordinates of SE(3). With the help of the linear time-varying Lyapunov inequality based prescribed-time stability theorem, a novel global adaptive prescribed-time time-varying high-gain control law is designed by backstepping. It is shown that the designed controller is bounded. Numerical simulations verify the effectiveness of the proposed control method.