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关于无人机导航精度优化问题,高空长航无人机航行时间长,而惯导误差随时间积累,所以长航时无人机在进入目标区域进行SAR(合成孔径雷达)侦察时产生导航误差,不能满足匹配要求,所以必须进行空中对准,以提高导航系统精度。为了有效提高对准的精度,明确载体机动对对准效果的影响,设计了高空长航无人机机动对准方案,在建立SINS/GPS速度和位置组合模式的卡尔曼滤波器模型的基础上,综合分析比较了不同机动方式对对准效果的影响。仿真结果证明,在速度位置组合模式下,“S”机动方式对空中对准的效果改善最大,且机动强度对对准效果也有影响;仿真结论为后续研究无人机长航时保持惯导精度提供重要参考依据,对提高组合导航性能具有重大意义。
On the UAV navigation accuracy optimization problem, long-haul long-haul long-haul UAVs have long flight time and inertial navigation errors accumulate over time, so long-haul UAVs produce navigation errors when they enter the target area for SAR (Synthetic Aperture Radar) reconnaissance , Can not meet the matching requirements, it must be aerial alignment, in order to improve navigation system accuracy. In order to effectively improve the precision of alignment and the effect of carrier maneuvering on the alignment effect, a scheme of maneuver alignment of high-altitude long-haul long-haul UAV was designed. Based on the Kalman filter model of SINS / GPS speed and position combination mode The effects of different maneuvering modes on the alignment effect were analyzed and compared comprehensively. Simulation results show that the effect of “S” maneuvering on air alignment is most improved and the maneuver intensity has an effect on the alignment effect in speed-position combination mode. The simulation results show that for the follow-up study of UAV long-haul Guide precision provides an important reference, to improve the performance of integrated navigation is of great significance.