一种基于再入飞行器的单平台无源定位技术

A Single-observer Passive Localization Technology Based On Re-entry Vehicle

为解决高速再入飞行运动平台单独对固定辐射源进行无源定位需要额外增加硬件及尺寸的问题,结合质点运动学的思想,研究了一种仅通过测量多普勒频率差的单平台运动合成虚拟多平台无源定位技术。针对高速再入飞行平台建立了定位模型,包括频差观测方程以及约束条件,通过克拉美罗下限(Cramer-Rao Lower Bound,CRLB)推算出辐射源位置的定位误差几何稀释(Geometric Dilution Precision,GDOP)误差表达式,分析了各影响因素对定位性能的影响。通过仿真,证实了该方法在再入飞行器平台的可行性,指出该定位体制的优缺点。

In order to solve the problem that single high-speed re-entry vehicle observer localize the fixed radiation need additional hardware.Based on the idea of particle kinematics theory,a virtual multi station passive localization technique is studied which only need measure the Doppler frequency difference.The localization model was proposed for high speed re-entry vehicle platform,including the frequency difference observation equation and constraint conditions,the Cramer-Rao-Lower-Bound(CRLB)to calculate the GDOP error equation,analyzed the influence of the factors to localization performance.Through the simulation,the feasibility of this method used on the re-entry vehicle platform is proved,and the advantages and disadvantages of the system are also pointed out.