星敏感器姿态测量相对基准偏差在轨标校方法研究

摘要

对航天器星敏感间姿态测量基准偏差在轨标校及性能评估问题进行研究.建立包含敏感器安装误差与测量误差的星敏感器模型,针对两种不同形式的安装误差模型,推导出相应的观测方程,基于卡尔曼滤波方法设计相对基准偏差估计器,并比较分析两种估计器实际应用特点.然后针对在轨实际应用,给出一种基于敏感器光轴夹角的标校性能评估方法,通过数学仿真验证星敏感器相对基准偏差的标校的有效性,并基于在轨数据的标校应用获取相对基准偏差在轨特性.%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 numer ical 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.