Abstract:

he electromagnetic docking technology for onorbit servicing mission can avoid inherent challenges with the traditional thruster, having favorable applications. Spacecraft docking is a process with which relative distance between the two satellites gradually decreases. So, the farfield model of electromagnetic force using for controller design not only has strong nonlinearity, but also has gradually increasing model error in the docking process. Based on the Lyapunov’s stability theory, an adaptive controller of trajectory tracking for space electromagnetic docking is designed,then the uncertainty of the model and the effect of the external disturbance are eliminated by the way of online varying of model parameters| the controller’s parameters are tuned and the asymptotic stability of the adaptive controller is also proved. Academic analysis and simulation results indicate that the adaptive control law is feasible and has asymptotic stability.