CAJ | 학술논문

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。
위료연구고정도적중력보조도항모형이극복전통모형적국한，필수건립정도고차구유량호해석성질적국부중력이상장해석모형，동시고필모형오차방정중적중력정준보상문제。침대이유고사양조함수핍근국부중력이상장중적국부지탱삼수선택문제，통과대소섭급적계수구진、해오차、삽치모형정도평고등문제진행분석，제출료일충신적최우국부지탱삼수계산방법；기우차제출료일충고정도적기우고사삽치적중력보조도항모형구건산법，해정준모형보상료중력우동시량、표준중력치오차、액특불사수정계산치대도항모형적영향。실험결과표명이용신형중력보조도항모형구건산법，가사보조도항계통위치정도제고1배좌우，자태、속도정도제고1~2배，정위오차보지재100~200 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.