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为完成地形辅助导航系统的传感器选型以及改进地形匹配算法和地形辅助导航系统可靠性的研究,开展了传感器精度对地形匹配概率的影响研究.针对不同的地形,分析了高度表误差、速度误差和航向角误差对地形匹配概率的影响,并根据实际要求通过仿真计算确定地形匹配系统中各传感器的误差范围.利用丘陵、山地和高山地等大量地形数据进行测试验证,仿真结果表明:在地形匹配概率大于90%时,速度误差小于2.2 m/s,航向角误差小于0.6°,高度表噪声标准差小于16.4 m.
In order to complete the sensor selection of terrain-assisted navigation system, and to improve the terrain matching algorithm and the reliability of the terrain-assisted navigation system, the influence of sensor accuracy on the terrain matching probability is studied.For different terrain, the altimeter error, velocity error And heading angle error on terrain matching probability.According to the actual requirements, the error range of each sensor in terrain matching system is determined through simulation.Using a large number of topographic data such as hills, mountains and alpine land to test and verify the results. The simulation results show that: When the matching probability is more than 90%, the speed error is less than 2.2 m / s, the heading angle error is less than 0.6 °, and the altimeter noise standard deviation is less than 16.4 m.