基于雷达的导航信息传递技术

Navigation information transfer technology based on radar

针对小型智能飞行器(miniature intelligent air-vehicle,MIA)低精度微惯导系统的动态初始对准和校准问题,提出了基于雷达的导航信息传递技术。将雷达及其载体当作一个刚体,设计了基于雷达的导航信息传递系统;基于雷达被动测向原理,提出了测定雷达主瓣波达方向(direction of arrival,DOA)的多重镜像压缩的传播算子(multiple image compression-propagator method,MIC-PM)估计算法。理论与仿真分析表明,相对于PM算法,MIC-PM算法计算量明显减少,DOA估计时间可达到9.3×10^(-3)s,满足MIA导航信息传递的实时性要求;同时,在低信噪比情况下的估计精度有所提高。

Aiming at the problem of dynamic initial alignment and calibration for the low precision micro-inertial navigation system of the miniature intelligent air-vehicle(MIA),the navigation information transfer technology based on radar is proposed.The radar and its carrier are regarded as a rigid body and the navigation information transfer system based on radar is designed.Based on the principle of radar passive direction finding,a estimating algorithm which calculates the direction of arrival(DOA)of the radar main lobe is established,which is called as multiple image compression-propagator method(MIC-PM)algorithm.Theory and simulation analysis show that the MIC-PM algorithm can greatly reduce the computation relative to PM algorithm,and the DOA estimating time is 9.3×10^(-3)s,which satisfies the real-time requirement of the MIA navigation information transfer.At the same time,estimation precision is improved in the case of low signal to noise ratio.