利用加速度计数据在轨标定重力卫星质心偏差  

Calibrating of the in-orbit center-of-mass offset of gravity satellite by accelerometer data

作　　者：刘超群[1] 谷德峰 黄志勇 王傲明 刘道平 LIU Chaoqun;GU Defeng;HUANG Zhiyong;WANG Aoming;LIU Daoping(School of Artificial Intelligence,Sun Yat-sen University,Zhuhai 519082,China;MOE Key Laboratory of TianQin Mission/Frontiers Science Center for TianQin/CNSA Research Center for Gravitational Waves,Sun Yat-sen University,Zhuhai 519082,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China)

机构地区：[1]中山大学人工智能学院,广东珠海519082 [2]“天琴计划”教育部重点实验室/天琴前沿科学中心/国家航天局引力波研究中心,广东珠海519082 [3]地理信息工程国家重点实验室,陕西西安710054

出　　处：《中山大学学报（自然科学版）（中英文）》2024年第2期123-130,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(41874028);中央高校基本科研业务费专项资金(23xkjc001)。

摘　　要：针对重力卫星质心偏差在轨标定的问题,提出了一种仅使用加速度计数据进行质心在轨标定的方法:以1A级加速度计数据作为输入,采用Butterworth滤波去除数据中的噪声,提取质心标定机动产生的线性加速度和角加速度信号,最后结合最小二乘原理对质心偏差进行标定。利用GRACE-FO C星的加速度计数据对提出的质心标定方法进行验证,估计了C星发射至今的质心偏差。结果显示,三轴的标定精度均优于10μm,与利用姿态数据计算的质心偏差在三轴方向上的互对比差异(RMS)为[9.6,9.3,7.9]μm,与喷气推进实验室(JPL)公布结果的RMS为[7.4,3.8,4.7]μm。与传统方法不同,由于仅使用了加速度计测量数据,该方法可用于卫星姿态缺失情况下的质心在轨标定。A method for calibration of the in-orbit center-of-mass offset only on accelerometer data is proposed in order to address the issue of calibration of the in-orbit center-of-mass offset of gravity satellite.With ACC1A data as input,and the Butterworth filter is utilized to remove noise from the data.The linear acceleration and angular acceleration signals caused by the calibration maneuver of center-of-mass are extracted,and finally,the center-of-mass offset is calibrated using the least squares estimation.The method for calibration of the in-orbit center-of-mass proposed in this paper is validated using the accelerometer data from the GRACE-FO C satellite,and the center-of-mass offset since the satellite's launch is estimated.The results show that the calibration accuracy of all three axes is better than 10μm.The RMS differences in the comparison of the center-of-mass offset results in the three-axis direction,obtained by using the proposed method and by calculating with attitude data,are respectively[9.6,9.3,7.9]μm,and the RMS of comparison with the center-of-mass offset published by JPL are respectively[7.4,3.8,4.7]μm.Different from the traditional method,because only accelerometer data is used,the proposed method can be used for calibration of the in-orbit center-of-mass in the case of data failure of gyroscope and star camera.

关 键 词：GRACE-FO 重力卫星 加速度计 质心标定 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]