基于波门预估递推剔除大跳动星点快速求解姿态算法研究

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英文篇名：A Rapid Calculating Attitude Method for Star Sensor Based on Tracing Window Using Predicting and Estimating 作者：刘腾骏 ; 林荣峰 ; 朱晏庆 ; 周宇 ; 肖东东 英文作者：LIU Teng-jun;LIN Rong-feng;ZHU Yan-qing;ZHOU Yu;XIAO Dong-dong;Shanghai Institute of Spaceflight Control Technology; 关键词：星敏感器 ; 波门跟踪 ; 多矢量定姿 ; 估计递推算法 ; 星点跳动 ; 星点剔除 ; 四元数 ; 波门参数 英文关键词：star sensor;;tracing window;;multi vector calculating attitude;;predicting and estimating;;star point jump;;error star points eliminating;;quaternion;;tracing window parameter 中文刊名：SHHT 英文刊名：Aerospace Shanghai 机构：上海航天控制技术研究所; 出版日期：2017-06-25 出版单位：上海航天 年：2017 期：v.34;No.204 语种：中文; 页：SHHT201703016 页数：6 CN：03 ISSN：31-1481/V 分类号：120-125

摘要

考虑星敏感器对快速性、稳定性和高精度的需求,针对传统星敏感器软件在采集波门出现大跳动采集星点时而出现星跟踪失败和姿态四元数信息无法输出的缺点,对一种基于波门预估递推剔除大跳动星点快速求解姿态的方法进行了研究。根据四元数及姿态矩阵,采用基于距离的有效数据提取方法以剔除无效和跳变的星点数据;针对不同天区的不同星点运动幅度各异的特征,采用预估递推波门大小可根据不同星点确定各自的波门半径,以减少因波门半径产生的无法跟踪和波门多星识别失败现象。改进了波门参数设定,并对波门跟踪进行优化:根据算得的旋转角度与真实转过角度的差异剔除无效星点并进行更新,由更新后的旋转角和姿态四元数估计新的四元数。数学仿真结果表明:该法可有效减小星点大跳动对姿态求解的影响,提高星敏感器输出四元数姿态的精度。
        Taking the star sensor's demanding for rapidity and stability and higher accuracy into consideration,a rapid calculating attitude method for star sensor based on tracing window using predicting and estimating was studied in this paper,because traditional star sensor showed star tracing failure and quaternion not being able to output while dealing with star points in tracing window having a big mistake jump.According to quaternion and attitude matrix,the extraction method of effective data was applied to reject the data of the ineffective and jumping star point based on distance.The various tracing windows related to different star points would be determined by predicting and estimating because individual star had its motion characteristic,which could reduce tracing failure caused by tracing window and multi-star identification failure.The setting of the tracing window parameters was improved.The tracing window was optimized.The ineffective star point was rejected according to the difference between the rotation angular computed and real rotational angular and the data set was updated.The new attitude quaternion was estimated by updated rotational angular and attitude quaternion.The numerical simulation results showed that this method could reduce the effect of large jumping star point on attitude determination greatly and improve the output accuracy of attitude quaternion for star sensor.

引文

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