基于自适应软切换的多星座组合导航系统研究

多卫星组合导航系统星座结构复杂、卫星数量多,在某些特定场合、特殊时间内需要快速完成星座和卫星的选取和重组.采用一种快速选星算法和自组织网络相结合的策略,并应用于多卫星导航系统建模和多星座软切换领域,既避开了系统对象建模这一难点,同时又充分利用卫星星座间的相互关联性,极大的发掘多卫星系统本身的潜力.仿真结果表明,快速选星算法和自组织组网技术可以增强整个导航系统的抗干扰性和自愈能力,以牺牲较少的定位精度来有效减少导航运算量,提高导航定位的实时性.

Multiple Satellite Integrated Navigation System Based on Self-adaptive Soft-switch Technology

As complexity is the feature of the structure of constellation and numerous satellites of multiple satellite in-tegrated navigation system, on some special occasions or during some unusual period, selecting and recombining of constel-lation and satellites should be completed quickly. An innovational strategy was adopted to combine fast algorithm of selec-ting satellites and self-organizing network applied in the field of system modeling of multiple satellite integrated navigationsystem and soft-switch of multiple constellation. This method avoided the difficulty of object modeling and took full advan-tage of relationship among satellite constellations. Therefore, the potential was fully explored of multiple satellite integratednavigation system itself. The simulation results show that the anti-jamming performance and self-healing ability of the wholenavigation system have been strengthened by fast algorithm of selecting satellites and self-organizing network. That is tosay, the computational complexity has been decreased to such an effect as to improve the real-time performance of the sys-tem by sacrificing very limited positioning precision.