关键词: 远地点发动机, 推力矢量, 数据处理, 不确定度评估

Abstract: The thrust vector parameters of apogee engine are important reference of satellite assembly. The GUM method has been used to evaluate its uncertainty, but there is a problem of insufficient coverage for input combination. The mathematical model of dynamic axial thrust vector measurement is introduced, and the evaluation process of the GUM method is summarized in the paper. The principle, applicability and specific evaluation process of Monte Carlo method are described in detail, and the evaluation results are compared with those of the GUM method. The comparison results show that the Monte Carlo method is more suitable than the GUM method for the uncertainty evaluation of apogee engine thrust vector parameters, which can verify the available of the GUM method.

Key words: Apogee engine, Thrust vector, Data processing, Uncertainty evaluation