摘要
卫星自主导航是指卫星不依赖地面支持,而利用星上自备的测量设备实时地确定自己的位置和速度,它是未来卫星导航的必然趋势。紫外敏感器具有精度高、体积小、可以实现多个敏感器功能的特点,利用地球成像的大小和位置以及恒星的位置可以获得卫星的导航信息。为了精确获得卫星导航信息,给出了轨道动力学模型,重点研究了地心矢量的确定方法,地心矢量的准确确定是精确导航的关键,提出了基于紫外敏感器的卫星自主导航模型,设计了扩展卡尔曼滤波算法,并结合轨道数据和测量数据进行了仿真,仿真结果说明了所提方案的有效性。
Autonomous navigation is confirming the position and velocity of satellite real-timely with its own measure facility and not relying on the ground facility,and it is the inevitable developing direction of satellite navigation.The precision of Ultraviolet sensors is high and the cubage is small,it can substitute many other sensors.The satellite navigation information can be acquired by Ultraviolet sensors,which use the size and position of earth imaging and the position of star.This paper introduces the basic question of ultraviolet sensors and proposes the model of satellite autonomous navigation based on ultraviolet sensors.The method of earth direction vector confirming is researched,and the extended Kalman filter is proposed.Simulation is done based on simulated orbit and measurement data,and the validity of navigation method is illuminated.
出处
《计算机仿真》
CSCD
北大核心
2010年第11期14-17,40,共5页
Computer Simulation
关键词
自主导航
紫外敏感器
地心矢量
扩展卡尔曼滤波
Autonomous navigation
Ultraviolet sensors
Earth direction vector
extended Kalman filtering
