An Adaptive Fault-Tolerant Control Scheme for 6-DOF Spacecraft Based on a Control Gain Reconstruction

An adaptive fault-tolerant control scheme based on a control gain reconstruction is proposed to solve the actuator failure problem of a six-degree-of-freedom (6-DOF) target-follower spacecraft formation system to ensure the position and attitude tracking performance of the tracking spacecraft against the target spacecraft, in this article. An attitude-orbit integration model based on dual quaternions was given. In response to the uncertainties caused by actuator faults, a control signal was designed by constructing a symmetric positive definite dual control gain matrix. The minimum eigenvalue of this matrix was utilized to account for the uncertainty. The effectiveness of the proposed adaptive control scheme was demonstrated through a simulation study.