Influence of Horizontal Disturbing Gravity on Position Error in Inertial Navigation Systems

GUAN Bin; SUN Zhongmiao; WU Fumei; LIU Xiaogang

doi:10.13203/j.whugis20160006

Volume 42 Issue 10

Oct. 2017

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Geomatics and Information Science of Wuhan University > 2017 > 42(10): 1474-1481. > DOI: 10.13203/j.whugis20160006

GUAN Bin, SUN Zhongmiao, WU Fumei, LIU Xiaogang. Influence of Horizontal Disturbing Gravity on Position Error in Inertial Navigation Systems[J]. Geomatics and Information Science of Wuhan University, 2017, 42(10): 1474-1481. DOI: 10.13203/j.whugis20160006

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Influence of Horizontal Disturbing Gravity on Position Error in Inertial Navigation Systems

GUAN Bin^{1, 2, 3,},
SUN Zhongmiao^{2, 3},
WU Fumei^{2, 3},
LIU Xiaogang^{2, 3}

1.
Institute of Geography Spatial Information, Information Engineering University, Zhengzhou 450052, China
2.
State Key Laboratory of Geo-information Engineering, Xi'an 710054, China
3.
Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China

Funds:

The National Natural Science Foundation of China 41174017

The National Natural Science Foundation of China 41304022

The National Natural Science Foundation of China 41374083

The National Natural Science Foundation of China 41674082

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Author Bio:
GUAN Bin, master, engineer, specializes in satellite altimetry and inertial navigation. E-mail: pershingb@gmail.com
Received Date: September 20, 2016
Published Date: October 04, 2017

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Abstract

Abstract

The influence of horizontal disturbing gravity (HDG) on the positional error of high-precision Inertial Navigation Systems (INSs) was studied under different conditions of movement. A space-state equation expressing INS error with HDG was deduced and analytic expressions of INS position error with HDG were deduced under three conditions of movement. Additionally, a method of computing above influence based on inertial navigation calculation is designed. Under the condition of uniform motion, INS position error caused by the same HDG was calculated through analytic expressions and inertial navigation calculations. The results from analytic expressions show that disturbing gravity varied between ±80 mGal (1 mGal = 10^-5 m/s²) causing about 3 000 m INS positional error at the maximum. A comparison of the results from two methods show that the level and change in INS positional error are basically consistent while the validity of each method was verified by these results.
- disturbing gravity,
- inertial navigation system,
- position error,
- acceleration,
- ultra-precise

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References (23)

References

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