利用星载加速度计及星敏感器进行卫星定轨的新方法  

A New Method of Orbit Determination with the Onboard Accelerometer and Star Camera

作　　者：杨龙[1] 董绪荣[1] 韩健[1] 

机构地区：[1]装备指挥技术学院导航研究中心,北京101416

出　　处：《宇航学报》2006年第B12期29-33,74,共6页Journal of Astronautics

摘　　要：介绍一种卫星自主定轨的新方法：采用组合星载加速度计和星敏感器的方法测量卫星非保守力进行星上自主定轨。介绍了该方法用于卫星定轨的原理：该方法利用星载加速度计测量载体坐标系下表示的卫星非保守力，然后利用星敏感器测量的姿态数据进行坐标转换，最后利用数值积分方法进行轨道确定。利用实际卫星飞行数据进行了验证。结果表明该方法用于卫星自主定轨是可行的，而且可以不依赖任何外部系统实现较高精度的星上自主定轨。该方法与传统的纯动力学法比较，计算简单，定轨精度高，定轨结果稳定，克服了传统定轨方法随时间发散的缺点。This paper presented a new method for satellite orbit determination- onboard orbit determination with the non-conservative forces been measured by accelerometer and star camera. The principle of this method was described in the paper： firstly the non-coaservative forces under the body frame were measured by accelerometer, then they were transformed into inertial frame with the transforming matrix which was computed with the star camera measurement data, at last orbit determination was completed with numerical integration. The method had been tested with the realize satellite flying data. The results show that the new technology for orbit determination is feasible. Furthermore it can make the orbit determination been done without any outer assistant. Compared with the classical dynamic technology, the formula of this method is easier and the result orbit is more precise and stable than the former. It also eliminates the disadvantage of not convergent with time pass by.

关 键 词：卫星定轨 加速度计 星敏感器 数值积分 

分 类 号：V412.4[航空宇航科学与技术—航空宇航推进理论与工程]