摘要
载体磁场的干扰是导致地磁导航精度较低的主要因素,在对无人机载体磁场干扰地磁场产生的地磁测量误差简要分析的基础上,将小姿态时地磁匹配导航采用的12系数误差补偿模型引入一种无人机地磁定向导航的罗差修正。在静态条件下,利用无磁转台分别获取无人机在±30°姿态角范围内有无干扰源的磁测数据。实验数据分析表明,通过补偿,载体航向角在±5°范围内其误差均方差由2.174°下降到0.350°,其余角度下航向角误差均方差则由2.282°下降到0.732°,满足无人机在大角度姿态飞行时航向稳定度优于±3°的要求。
The main factor leading to decline in geomagnetic navigation accuracy is the carrier magnetic field.Based on analyzing the geomagnetic measurement error which caused by UAS carrier magnetic interference geomagnetic field,lead the 12 coefficient compensation model into UAS＇ compass deviation,which used in the geomagnetic matching navigation on small gesture.In the static condition,use the non-magnetic turntable respectively to obtain magnetic data of UAS in the range of ± 30° attitude angle,with interference source or without.The data analysis shows that through the compensation,the error variance of carrier heading angle in ± 5° range is from 2.174° down to 0.350°,and in the rest angle the heading angle＇s error variance is from 2.282° down to 0.732°.It satisfies the requirements that the flight course stability should be better than ± 3° when a certain type of UAS in large angle attitude flies.
出处
《航空计算技术》
2013年第3期69-72,79,共5页
Aeronautical Computing Technique
关键词
载体磁场
地磁干扰
误差补偿
罗差
carrier magnetic field
geomagnetic interference
error compensation
compass deviation
