基于飞行器三维组网测距信息的导航误差估计技术研究

Research on Navigation Error Estimation Technology Based on Distance Measurement Information of Aircraft Three-dimensional Network

本文针对提高无卫星导航定位系统中惯导系统导航定位精度的问题,提出了基于飞行器三维组网测距信息的导航误差估计技术,利用飞行器间测距信息对惯导系统误差进行修正,能够显著提升三维组网中飞行器的导航定位精度。首先,分析了飞行器三维组网导航原理,设计了系统技术方案,并提出了一种导航效果评估方法。其次,详细研究了基于测距信息的三维组网导航误差估计算法,构建了误差估计模型。最后进行了仿真验证,结果表明:对一个由4个飞行器组成的组网,当测距误差为20 m时,经过10 min组网导航飞行,惯导位置误差可提高2倍以上;当组网中还包含一个高精度组合导航校正站时,经过10 min组网导航飞行,飞行器的惯导位置误差可提高一个量级,验证了本文所提基于飞行器三维组网测距信息的导航误差估计技术的有效性。

This paper aims at the problem of how to improve the navigation and positioning accuracy of the inertial navigation system without satellite navigation and positioning systems,and proposes a navigation error estimation technology based on distance measurement information of aircraft three-dimensional network.By using the inter-aircraft distance measurement information to correct the navigation error of the inertial navigation system,it can significantly improve the navigation and positioning accuracy of the aircraft in the three-dimensional network.First,analyze the principles of aircraft three-dimensional networking navigation,design a system technical plan,and set a navigation effect evaluation method.Second,design a three-dimensional distance measurement navigation error estimation algorithm and build a settlement model.Finally,simulation verification is performed.The simulation results show that:for a network composed of 4 aircrafts,when the distance measurement error is 20 m,after 10 minutes of network navigation flight,the inertial navigation position error can be increased by more than 2 times;when the network also includes a high-precision integrated navigation correction station,after 10 minutes of networking navigation flight,the inertial navigation position error of the aircraft can be increased by an order of magnitude,which verifies the feasibility of the technology.