局部连续场下重力辅助导航模型构建算法

发布时间：2018-05-19 15:25

本文选题：重力辅助导航 + 高斯样条插值　；参考：《中国惯性技术学报》2014年03期

【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。
[Abstract]:In order to study the high precision gravity aided navigation model to overcome the limitation of the traditional model, the analytical model of local gravity anomaly field with high precision and good analytical property must be established, and the problem of accurate gravity compensation in the model error equation must be considered at the same time. Aiming at the problem of parameter selection of local support in 2-D Gao Si spline approximation to local gravity anomaly field, the problems of coefficient matrix, solution error, precision evaluation of interpolation model and so on are analyzed. In this paper, a new method for calculating the optimal local support parameters is proposed, based on which a high precision gravity aided navigation model based on Gao Si interpolation is proposed, which compensates the gravity disturbance vector and the error of the standard gravity value. The effect of Eterworth's correction on the navigation model. The experimental results show that by using the new gravity aided navigation model, the position accuracy, attitude and velocity accuracy of the auxiliary navigation system can be increased by about 1 times, and the positioning error is kept at 100 ~ 200 m.
【作者单位】：第二炮兵工程大学304教研室;中国人民解放军96124部队;
【基金】：国防预研(103030203)
【分类号】：TN966

【参考文献】