空空导弹SINS飞行中对准技术

In flight Alignment for Air to air Missile

关键词:  飞行中对准  伪距/伪距率  在线标定

Key words:  In flight alignment  Pseudo range/pseudo range rate  Online calibration

摘要:

针对空空导弹捷联惯导系统传递对准的精度和快速性之间的矛盾，设计一种利用弹载北斗卫星导航信息的捷联惯导系统飞行中对准算法，详细推导了惯性系下基于北斗卫星伪距/伪距率的飞行中对准模型，优化了飞行中对准的量测方程，对北斗卫星接收机的钟差和钟漂进行了降维处理。相应的数学仿真试验结果表明，所提算法能够在飞行过程中实现捷联惯导系统的初始对准，在10s内对准精度优于6′，同时该算法通过在线标定惯性传感器随机启动误差，能够提高捷联惯导系统导航精度和导弹系统抗干扰能力。

Abstract:

In order to solve the contradiction between precision and rapidity in SINS transfer alignment for air to air missile，a new in flight alignment algorithm is proposed in this paper，according to the missile borne BDS navigation information.The in flight alignment model based on pseudo range/pseudo range rate in inertial frame is derived in detail，the model reduction of clock error and clock frequency drift of Beidou receiver is proposed，the measurement equation of in flight alignment model is optimized.Simulation results show that the algorithm can realize SINS initial alignment during the flight，the alignment precision is better than 6 arc minutes in 10 second，and the algorithm can calibrate the random error of the inertial sensor online，it can increase navigation accuracy of missile borne SINS and anti jamming of air to air missile further.