关键词: 关键词： 航天器, 姿态测量, 安装误差标校, 卡尔曼滤波, 星敏感器

Abstract: Abstract：The problems of star sensors relative misalignment calibration and its performance evaluation are investigated. First, an integrated star sensor model including misalignment and measurement error is established. Then, measurement equations for alignment calibration are deduced individually for two different misalignment descriptions, and corresponding estimators are also designed based on Kalman filtering method. Meanwhile, the comparison is present between these estimators when applied to inflight spacecraft calibration. Furthermore, an evaluation method is developed by angle between optical axes of dual star sensors. Finally, the effectiveness of the proposed calibration method is demonstrated by numerical simulations, and the characteristic of inorbit star sensors misalignment relative to each other are also obtained by applying the proposed method with telemetry data．  

Key words: Keywords：spacecraft, attitude measurement, alignment error calibration, Kalman filtering, star sensor