Parameter Identification-Based Attitude Stabilization Control of Spacecraft with Multiaccessories during Orbital Maneuver

Targeted at one kind of on-orbit servicing spacecraft that contains flue containers, momentum actuators, space manipulators, and captured unknown objects, a specific attitude control problem during orbital maneuvers is under investigation in this paper. To overcome strong uncertainties during the onboard service, a parameter-identification algorithm is developed to estimate all inertial parameters of each part of the spacecraft system, and the identification results are obtained based solely on the measurement of the inertial navigation system. Therefore, the disturbance from the torque coupling of the orbital engine can be thus effectively compensated. Based on the identified parameters, the attitude stabilization problem is taken into practical consideration to tackle the strong influence from the orbital engine disturbance of concern. In order to specifically suppress the disturbance, a hybrid control strategy based on the momentum actuators and thrusters is proposed, which not only provides better precision than the conventional thruster-based method but also guarantees the momentum actuators against the momentum saturation issues. Numerical simulations are conducted to verify the effectiveness of the proposed algorithms.