Abstract:

An attitude controller preferential evaluation system based on group decision making is constructed to deal with the controller selection problem in the process of spacecraft overall design, and a reliability index is defined to measure the reliability of the evaluation result. An evaluation index system is constructed, which includes the robustness of controller, controlling torque, sensitivity to parameter, complexity of controller and rate of convergence, determine the weights of indexes with the combination weighting method based on the OWA operator, and an interval group decision making method is provided to select the optimal controller, a quantitative description index of evaluation result’s reliability based on interval analysis is defined. The attitude stability controller preferential evaluation process in the process of spacecraft overall design is analyzed, the effectiveness of the controller preferential evaluation system and the high reliability of the evaluation results are verified, which enriches the theory of decision-making, and enhance the policymakers’ confidence.