针对高速无人机光电侦查平台的实时对地目标定位误差,研究了基于惯导信息的光电平台目标定位算法。利用目标定位数学模型和误差模型,分析了影响目标定位精度的因素,建立了参数误差对于定位精度影响的数学仿真模型。通过仿真分析确定了卫星导航信息的实时性是造成定位误差的主要因素,提出了通过修正卫星导航信息延时时间来解决了光电侦察平台实时目标定位误差问题。进行了飞行试验以验证提出论点的正确性,结果表明: 通过修正卫星导航信息延时时间,有效补偿了载机坐标信息滞后,提高了光电侦察平台目标定位精度,定位误差由补偿前的100 m减少到小于40 m。研究结果对高速飞行器的相关应用具有重要的参考价值。

For the real time ground target location precision of an Optic Electric(O-E) reconnaissance platform of the subsonic Unmanned Aerial Vehicle (UAV),an algorithm for O-E platform location was proposed based on inertial navigation information. The influence factors on the precision of target location were studied by using the mathematics model and error model of target location. The mathematical simulation model with influences of parameter errors on the precision of target location was established. Simulation results show that the real-time performance of the satellite navigation information is the decisive factor affecting the target location error. Then,it points out that modifying the delay time of the satellite navigation information can solve the real-time target location error problem of the O-E reconnaissance platform. A flying experiment was carried out to verify the results above mentioned. The results indicate that real-time target location precision of O-E reconnaissance platform for the high speed UAV has been substantially improved by modifying the delay time of the satellite navigation information,and the location error has decreased from 100 m to less than 40 m. The result has important reference values for applications of high speed aerocrafts.