局部连续场下重力辅助导航模型构建算法  

Constructive model algorithm for gravity aided navigation in local anomaly field

作　　者：文超斌 王跃钢[1] 田琦[1] 郭志斌[1] 左朝阳[1] 杨家胜 

机构地区：[1]第二炮兵工程大学304教研室,西安710025 [2]中国人民解放军96124部队,通化134000

出　　处：《中国惯性技术学报》2014年第3期368-373,共6页Journal of Chinese Inertial Technology

基　　金：国防预研(103030203)

摘　　要：为了研究高精度的重力辅助导航模型以克服传统模型的局限，必须建立精度高且具有良好解析性质的局部重力异常场解析模型，同时考虑模型误差方程中的重力精准补偿问题。针对二维高斯样条函数逼近局部重力异常场中的局部支撑参数选择问题，通过对所涉及的系数矩阵、解误差、插值模型精度评估等问题进行分析，提出了一种新的最优局部支撑参数计算方法；基于此提出了一种高精度的基于高斯插值的重力辅助导航模型构建算法，该精准模型补偿了重力扰动矢量、标准重力值误差、厄特弗斯修正计算值对导航模型的影响。实验结果表明利用新型重力辅助导航模型构建算法，可使辅助导航系统位置精度提高1倍左右，姿态、速度精度提高1~2倍，定位误差保持在100~200 m。In studying high-precision gravity aided navigation, it is indispensable to build a local continuous gravity anomaly field model with high precision and good analytic property, and accurately compensate the gravity in error equation. To solve the choice problem of local support optimal parameters in local continuous gravity anomaly field model with 2D gauss spline interpolation, an local support optimal calculation method is proposed by studying the related problems such as, coefficient of matrix, solution errors, and interpolation model evaluation, etc. Then a high-precision construct algorithm based on the gravity aided navigation model is put forward, which has compensated the gravity disturbance vector, standard gravity value error and eotvos effect. The experiment results show that the positioning accuracy is increased by about 1 times, the attitude and the velocity are both increased by 1~2 times. Its latitude and longitude errors are kept within 100~300 m.

关 键 词：重力辅助导航 高斯样条插值 重力误差补偿 导航模型 

分 类 号：U666.1[交通运输工程—船舶及航道工程]