编队飞行卫星GPS定轨的研究

发布时间：2018-02-04 16:18

本文关键词： 卫星编队相对运动卡尔曼滤波相对定位定轨 GPS　出处：《国防科学技术大学》2013年硕士论文　论文类型：学位论文

【摘要】：编队飞行卫星是目前国内外航天领域重点研究的问题之一,因其飞行轨道距离很近,轨道精度需求高,依靠传统的无线电载波测量的定轨方法,已无法满足编队飞行卫星定轨的要求。随着航天技术的发展,国内外提出了基于GPS的编队飞行卫星定轨方案。本文在研究编队飞行卫星相对运动规律的基础上,重点讨论了以典型的两颗卫星为代表的编队飞行卫星的GPS定轨问题。主要研究内容如下:1.进行了编队飞行卫星GPS定轨设计,GPS为编队飞行卫星提提供厘米级相对定位位置信息,几十纳秒级的相对时差测量精度时间信息。2.分析了基于GPS的绝对定位的误差。由分析可以得出,利用GPS定轨能够提供6cm高精度相对定轨测量精度指标,完全能够满足编队飞行卫星对相对时间精度要求。3.设计了编队飞行卫星GPS定轨算法,该方法以位置或相对位置为参数建立状态方程,并采用卡尔曼滤波算法对绝对和相对定位滤波方程进行状态估计。4.进行了卫星编队飞行GPS定轨的仿真系统设计。该仿真系统主要进行基于GPS模拟信号仿真,并将GPS仿真器输出的仿真值与理论值的比对和分析,得出误差结果。
[Abstract]:Formation flying satellite is one of the key research problems in the field of spaceflight at home and abroad. Because of its close orbit distance and high orbit precision, it relies on the traditional method of orbit determination based on radio carrier measurement. It can not meet the requirements of orbit determination of formation flying satellites. With the development of space technology. The orbit determination scheme of formation flying satellites based on GPS is put forward at home and abroad. In this paper, the relative motion rules of formation flying satellites are studied. The GPS orbit determination of formation flying satellites represented by two typical satellites is discussed emphatically. The main research contents are as follows: 1. The design of GPS orbit determination for formation flying satellites is carried out. GPS provides centimeter-level relative position information for formation flying satellites. The accuracy time information of relative time difference measurement of tens of nanoseconds. 2. The error of absolute positioning based on GPS is analyzed. GPS orbit determination can provide 6 cm high precision relative orbit determination precision index, which can completely meet the relative time precision requirements of formation flying satellites. 3. The GPS orbit determination algorithm of formation flying satellites is designed. The equation of state is established with the parameter of position or relative position. The Kalman filtering algorithm is used to estimate the absolute and relative position filtering equations. Finally, the simulation system of GPS orbit determination for satellite formation flight is designed. The simulation system is mainly based on GPS analog signal. Simulation. The simulation value and theoretical value of GPS simulator are compared and analyzed, and the error results are obtained.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：V412.41;P228.4

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