基于地心地固系的极区惯性/卫星组合导航算法  

ECEF Integrated Navigation Based on Inertial and Satellite Navigation for Polar Region

作　　者：杜红松[1] DU Hong-song(Institute of Naval Vessels,Naval Academy of Armament,Beijing 10061,China)

机构地区：[1]海军装备研究院舰船所,北京100161

出　　处：《光学与光电技术》2022年第3期123-129,共7页Optics & Optoelectronic Technology

摘　　要：针对“游移系组合+格网系或横向系输出”体制下极区惯性/卫星组合导航系统输出位置误差不断发散的问题,通过分析和验证横向系或格网系位置误差发散机理,推导地心地固系(Earth-Centered-Earth-Fixed System,ECEF)下的惯导编排方案和惯导误差方程,设计ECEF系惯性/卫星组合算法,解决格网系或横向系输出位置误差发散问题,为惯性/卫星组合体质下超长航时横向系或格网系输出全球导航打下基础。根据惯导和卫导数据,对比分析游移系惯性/卫星组合算法和ECEF系惯性/卫星组合算法,验证ECEF系惯性/卫星组合算法避免位置误差发散的有效性,结果表明ECEF系下组合方案可较好地避免极区导航输出信息转换引入的位置误差发散问题,实现极区高精度长时间组合导航。The output position error of the polar inertial/satellite integrated navigation system continues to diverge under the‘wandering system combination+grid system or lateral system output’system.To avoid this problem,the divergence mechanism of the position error of the horizontal system or grid system is analyzed and verified,the inertial navigation arrangement scheme and the inertial navigation error equation under the Earth-centered-Earth-Fixed System(ECEF)are derived and the ECEF system inertial/satellite combined algorithm is designed.Finally,by solving the problem,it lays the foundation for the ultra-long-endurance lateral system or the grid system output global navigation under the inertial/satellite combined physique.According to the inertial navigation and satellite navigation data,the combined inertial/satellite algorithm of the wandering system and the combined inertial/satellite algorithm of the ECEF system are compared and analyzed,and the effectiveness of the combined inertial/satellite algorithm of the ECEF system in avoiding position error divergence is verified.It can better avoid the problem of position error divergence caused by the conversion of the output information of the polar navigation,and realize the high-precision and long-term integrated navigation of the polar region.

关 键 词：地心地固系 横向系 组合导航 位置误差 算法 

分 类 号：TN967.2[电子电信—信号与信息处理]