摘要
研究了卫星利用CCD紫外敏感器进行自主轨道确定的方法。敏感器通过地球紫外图像提供地心方向矢量及姿态误差信息进而确定卫星轨道。采用Unscented卡尔曼滤波算法,对紫外敏感器测量精度、姿态误差、部分轨道参数以及地球模型对导航精度的影响进行了仿真验证。仿真结果表明本方法具有较高的定轨精度,其导航误差主要取决于紫外敏感器测量精度和卫星姿态误差。
An autonomous orbit determination method using the CCD ultraviolet sensors is studied. The sensors provide the direction vector information of pointing to the earth center and attitude measurement error from the earth ultraviolet image. Simulation is taken using the unscented Kalman filter to validate the effect of the ultraviolet sensor measurement precision, attitude error, certain orbit parameters and the model of earth shape on navigation precision. The results indicate that this method has high precision for orbit determination, and the navigation error is mainly dominated by the measurement precision of ultraviolet sensor and attitude measurement error.
出处
《航天控制》
CSCD
北大核心
2007年第2期47-51,72,共6页
Aerospace Control
关键词
自主导航
紫外敏感器
UKF滤波
卫星轨道
Autonomous navigation
Ultraviolet sensor
UKF filter
Satellite orbit
