Attitude and orbit coupled dual sliding-mode surface control for approaching and tracking tumbling target

According to the particular demand to the approaching and tracking control of the space tumbling target and the applicability of arbitrary captured position, a coupled dynamic model of relative attitude and orbit is established. Under the measurement uncertainties and disturbances, the robust dual sliding-mode surface control law with the ability of disturbance compensation and jitter suppressing is designed. The error propagation model from the measurement to the input control quantity in the system is analyzed and established. The single and double sliding-mode surface control laws are simulated separately, under the conditions of the measurement uncertainty, control disturbance and input constraint. The result verified that the dual sliding-mode surface control law has the better performance for the system with measurement uncertainty and disturbance.