摘要
针对地形匹配导航系统的传感器选型、改进地形匹配算法的研制以及地形匹配系统可靠性的研究，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仿真统计计算，仿真结果表明，在地形匹配概率大于90％时，速度误差〈2．2m／s，航向角误差〈0．6°、高度表噪声标准差〈16．4m。
In order to select the type of the sensor, improve the TAN algorithm, and do research on the reliability of the TAN system, the influence of the sensor＇s accuracy on the match probability has been studied in the Terrain Matching Navigation System （TMNS）. Based on different terrain, the factors of impact on match probability have been analyzed, which are barometer error, radar altimeter error, velocity error, and heading angle error. The error range of sensors was determined by simulation computing in practical system. A simulation experimentation was implemented by using the digital map of hills, mountains and high mountains. The simulation results shows that the allowed velocity error 〈 2.2m/s, the heading angle error 〈 0.6° and standard deviation of altimeter noise 〈 16.4m, when the match probability 〉 90%.
关键词
地形匹配
匹配概率
传感器精度
Terrain Matching
Match Probability
Sensor＇ s Accuracy
