Affiliation:
1. Inertial Navigation Department, Xi’an Institute of High-Tech, Xi’an 710025, China
Abstract
With the development of high-precision inertial navigation systems, the deflection of vertical (DOV), gravity disturbance, is still one of the main error sources that restrict navigation accuracy. For the DOV compensation of the Strapdown Inertial Navigation System (SINS) problem, the influences of the calculation degree of the spherical harmonic coefficient and the calculation error of the DOV on the compensation effect were studied. Based on the SINS error model, the error propagation characteristics of the DOV in SINS were analyzed. In addition, the high-precision global gravity field spherical harmonic model EIGEN-6C4 was established and the influence comparative analysis of the calculation degree of the spherical harmonic coefficient on the DOV compensation of SINS in different regions was carried out. Besides, the influence of the calculation error of the DOV on the compensation was emphatically analyzed. Finally, the vehicle experiment verified the feasibility of compensation in SINS based on the gravity field spherical harmonic model. The simulation and experiment results show that it is necessary to consider the influence of the calculation degree and the calculation error of the DOV on the compensation for long-time high-precision SINS with the position accuracy of 0.3 nm/h, while the SINS with general requirements for position accuracy can ignore the impact.
Funder
National Natural Science Foundation of China
Subject
General Engineering,General Mathematics
Reference22 articles.
1. Research on gravity vertical deflection on attitude of position and orientation system and compensation method
2. EIGEN-6C4, the latest combined global gravity field model including GOCE data up to degree and order 2190 of GFZ Potsdam and GRGS toulouse;C. Förste
3. Influence of gravity disturbance on initial alignment of inertial navigation system;S. Hao;System Engineering and Electronics,2020
4. Error compensation of an optical gyro INS by multi-axis rotation
5. In-motion filter-QUEST alignment for strapdown inertial navigation systems;X. Xu;IEEE Transactions on Instrumentation and Measurement,2018
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献