基于精密星敏感器的航天器高精度姿态测量标定方法

High precision attitude measurement and calibration method of spacecraft based on precision star sensor

摘要:

为了解决传统航天器姿态测量方法中存在的误差率高的问题,提出基于精密星敏感器的航天器高精度姿态测量标定方法。首先对使用的精密星敏感器进行设计,并将在不影响航天器运行的前提下安装在合适的位置上。通过建立运动坐标系、坐标参数转换和设置姿态参数三个步骤得出航天器运动模型,在该模型下分析出航天器姿态的基本运动规律、利用精密星敏感器识别并选取航天器空间下的任意三个星点,最后综合定位的星点和航天器姿态的运动规律,从不同的角度上确定航天器姿态测量结果,为了提高航天器姿态测量结果的精度进行标定处理。通过模拟实验分析得出结论：与传统测量方法相比,基于精密星敏感器的航天器高精度姿态测量标定方法的平均误差率降低了6.0%。

Abstract:

In order to solve the problem of high error rate in traditional spacecraft attitude measurement method, a high precision attitude measurement calibration method based on precision satellite sensor is proposed. The precision satellite sensors used are designed first and will be installed in appropriate positions without affecting the operation of the spacecraft. Through the establishment of motion system, the parameters of coordinate conversion and attitude parameters of the three steps to get the spacecraft motion model, under the model analysis of the basic motion of spacecraft attitude, using high precision star sensor identification and selection of spacecraft under arbitrary three star, finally integrated positioning of the star and the movement of spacecraft attitude, determine the spacecraft attitude measuring results from different angles, in order to improve the accuracy of the spacecraft attitude measuring results of calibration process. Through the analysis of simulation experiment, the conclusion is drawn that compared with the traditional measurement method, the average error rate of the spacecraft high-precision attitude measurement calibration method based on precision star sensor reduces by 6.0%.