CAJ | 학술논문

为克服高精度的重力辅助导航传统模型的局限，必须考虑模型误差方程中的重力精化补偿问题。本文在研究二维高斯样条插值函数逼近局部重力异常场的基础上，提出了一种重力辅助导航精化模型构建算法。该精化模型补偿了重力扰动矢量、标准重力模型误差、厄特弗斯修正计算值对导航模型的影响。试验结果表明，利用本文的新型重力辅助导航模型构建算法可使辅助导航系统定位精度提高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。
위극복고정도적중력보조도항전통모형적국한，필수고필모형오차방정중적중력정화보상문제。본문재연구이유고사양조삽치함수핍근국부중력이상장적기출상，제출료일충중력보조도항정화모형구건산법。해정화모형보상료중력우동시량、표준중력모형오차、액특불사수정계산치대도항모형적영향。시험결과표명，이용본문적신형중력보조도항모형구건산법가사보조도항계통정위정도제고1배좌우，자태、속도정도제고1～2배，정위오차보지재100～200 m。
The gravity compensation of error equation thoroughly should be solved before the study on gravity aided navigation with high precision .A gravity aided navigation model construction algorithm based on research the algorithm to approximate local grid gravity anomaly filed with the 2D Gauss spline interpol ation is proposed .Gravity disturbance vector ,standard gravity value error and Eotvos effect are all compensated in this precision model .The experiment result shows that positioning accuracy is raised by 1 times ,the attitude and velocity accuracy is raised by 1~2 times and the positional error is maintained from 100~200 m .