导航定位中地磁测量误差补偿技术研究

Research on geomagnetic measurement error compensation in navigation and localization

高精度的地磁测量是地磁匹配定位中的关键技术,需要实时测量地磁场数据,为匹配定位算法提供依据,导航载体上钢铁构件组成的干扰磁场是地磁测量误差的主要来源。论文在分析地磁测量误差补偿模型的基础上,针对载体上多种钢铁构件组成的干扰磁场,提出了采用十二常系数补偿算法消除测量误差。利用实验数据,对误差补偿效果进行了对比分析,提出了解决措施,有效提高了地磁测量精度。

High-precision geomagnetic measurement is the key technology in geomagnetic matching localization,which needs real-time measurement of geomagnetic field data to provide a basis for matching localization algorithm.The interference magnetic field composed of steel members on navigation carrier is the main source of geomagnetic measurement error.Based on the analysis of the geomagnetic measurement error compensation model,this paper proposes to eliminate the measurement error by using the twelve-constant coefficient compensation algorithm in view of the interference magnetic field composed of various steel components on the carrier.By using the experimental data,the effect of error compensation is compared and analyzed,and the solution is put forward,which effectively improves the precision of geomagnetic survey.