火力与指挥控制2011，Vol.36Issue(10)：24-27,4.
一种陀螺与星敏感器组合定姿算法
Attitude Determination Algorithm Based on Gyroscopes and Star Sensor
摘要
Abstract
an integrated attitude determination algorithm based on gyroscopes and star sensor is presented in this paper. First, satellite attitude is described with quaternion to avoid the error caused by incorrectly selecting state and measurement vector. Then the error sources of gyroscopes and star sensor are thoroughly analyzed and the quaternion and gyroscopes error are adopted as state variables, by which system state equations are well constructed. Measurement matrix is constructed by using measurements from star sensor as system measurements. And the measurement equations are set up by the new mathematic transformation. Finally, the attitude determination algorithm is developed by means of extended Kalman filtering. The simulation results show that this algorithm can compensate gyroscope drift effectively with high accuracy even by use of moderate precision gyroscopes. Meanwhile, it also demonstrates that some factors, such as measurement noise of star sensor, may influence the attitude determination accuracy in some degree.关键词
星敏感器/陀螺/组合定姿/卡尔曼滤波Key words
star sensor,gyroscopes,integrated attitude determination,Kalman filter分类
航空航天引用本文复制引用
李晨,韩崇昭,朱洪艳,周海银,王小亮..一种陀螺与星敏感器组合定姿算法[J].火力与指挥控制,2011,36(10):24-27,4.基金项目
国家重点基础研究发展计划"973"基金资助项目(2007CB31006) （2007CB31006）
