一种地磁/惯性深度融合导航方法

A geomagnetic/inertial depth fusion navigation method

地磁/惯性融合导航是一种不依赖全球导航卫星系统的自主导航方式之一,具有很强的隐蔽性和抗干扰性能,是固体火箭的可用自主导航方式之一。基于前人在惯性/地磁融合导航研究的基础,对地磁导航、惯性导航的优缺点进行详细分析,将地磁导航在高度和纬度的确定优势和惯导在经度和纬度确定优势进行充分融合,提出了具备东向速度间接估计校正的地磁/惯性深度融合导航方法,摒弃地磁导航在经度、惯导在高度方向确定的劣势。结合实际弹道数据的导航仿真对比试验表明,所提出方法可以充分吸收两种导航的优势,相比传统的地磁/惯性融合方式,导航精度在相同条件下提升45.6%,为高精度地磁/惯性融合导航提供一种新的方法。

Geomagnetic/inertial integrated navigation is one of the autonomous navigation methods that do not rely on GNSS,which has strong concealment and anti-interference performance.It is one of the available autonomous navigation methods of solid rocket.Based on the previous research on inertial/magnetic fusion navigation,the advantages and disadvantages of geomagnetic navigation and inertial navigation are analyzed in detail,the advantages of geomagnetic navigation in determining altitude and latitude and inertial navigation in determining longitude and latitude are fully integrated.A geomagnetic/inertial deep fusion navigation method with indirect estimation of longitude direction velocity is proposed,which gives up the disadvantages of geomagnetic navigation in determining longitude and inertial navigation in determining altitude.The navigation simulation experiment combined with the actual trajectory data shows that the proposed method can fully absorb the advantages of the two navigation methods.Compared with the traditional geomagnetic/inertial fusion method,the navigation accuracy is improved by 45.6%under the same conditions,and a new method for high-precision geomagnetic/inertial fusion navigation is provided.