Abstract: Autonomous control is an important goal pursued in the design of spacecraft control systems. Aiming at maximizing the control ability of the actuator in the control system under the limited configuration resource, a reaction wheel configuration optimization method is proposed, which considers the fault and under actuated condition, and comprehensively considers the reaction wheel control capability in the fault and under actuated stage. Firstly, the description of the optimization problem of the simple 4 wheeled reaction wheel configuration is carried out according to the purpose of the reaction wheel configuration. Secondly, according to the possible failure situation of the reaction wheel in the whole life stage, the control ability of the 4wheeled reaction wheel in the fault stage is analyzed. Thirdly, according to the control ability of the 4 wheeled reaction wheel in each fault stage, the reaction wheel configuration optimization model is established to find the optimal configuration under the whole life stage. Finally, the configuration of a project instance is analyzed via this method. The simulations are carried out for the three working stages that may occur. The results show that the proposed method can effectively realize the autonomous operation of the spacecraft, which proves that the proposed method is feasible and effective, and thus has certain engineering value.

Key words: reaction wheel, fault, under actuated, configuration optimization