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迎角和侧滑角是飞船返回舱再入飞行试验气动分析工作所需的重要参数。本文发展了基于弹道重建的返回舱迎角和侧滑角估计方法。首先,利用舱上测量数据和有限的地面雷达测量数据,采用极大似然法进行弹道重建,再现黑障区的弹道,同时给出整个再入过程的弹道参数;然后,利用几何关系法计算迎角和侧滑角,并进行风修正。对某飞船返回舱的飞行试验数据进行了计算和分析,结果证实了弹道重建数学模型和算法的正确性以及迎角和侧滑角估计方法的有效性。
Angle of attack and side slip angle is the spacecraft re-entry flight test flight aerodynamic analysis of the important parameters required. In this paper, the method of estimating the angle of attack and the slip angle of the return capsule based on the trajectory reconstruction is developed. First of all, based on the on-board measurements and the limited ground-based radar data, the maximum likelihood method is used to reconstruct the trajectory and reproduce the trajectory of the black-out area. At the same time, the ballistic parameters of the whole reentry process are given. Then, Angle of attack and side slip angle, and wind correction. The flight test data of a spacecraft’s return capsule were calculated and analyzed. The results confirmed the validity of the ballistic reconstruction mathematical model and algorithm and the method of estimating the angle of attack and the slip angle.