The initial alignment method, including the identification of inertial device error parameters, has always been a key issue in an inertial navigation system (INS). This study focuses on the error caused by the random noise of inertial devices that can be compensated by the reconstruction of gravitational apparent motion in an inertial frame under the condition of swinging motion. Attitude angles and accelerometer bias can also be estimated. However, the analysis and simulation results indicate that the existing methods cannot estimate the gyroscope bias. The accelerometer and the gyroscope bias will change over a long time, which will lead to long-term parameter identification accuracy decline or even failure. In this paper, a parameter identification algorithm based on Newton iterative optimization combined with a window loop calculation is designed to solve these problems. Simulation and turntable tests indicate that the proposed new algorithm can fulfill the initial alignment of strapdown INS under the swinging condition and estimate accelerometer bias effectively. Moreover, the new algorithm improves data utilization, which also has better time sensitivity, and the calculated alignment errors can nearly approach zero.
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December 2020
Research Article|
December 01 2020
A Newton iterative optimization combined with window loop calculation algorithm for estimating accelerometer bias based on gravitational apparent motion with excitation of swinging motion
Yongjiang Huang
;
Yongjiang Huang
a)
1
School of Instrument Science and Engineering, Southeast University
, Nanjing 210096, China
2
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education
, Nanjing 210096, China
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Xixiang Liu
;
Xixiang Liu
b)
1
School of Instrument Science and Engineering, Southeast University
, Nanjing 210096, China
2
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education
, Nanjing 210096, China
b)Author to whom correspondence should be addressed: [email protected]. Tel.: +86(0)13952061500
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Yupeng Zhang;
Yupeng Zhang
1
School of Instrument Science and Engineering, Southeast University
, Nanjing 210096, China
2
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education
, Nanjing 210096, China
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Miaomiao Zhao;
Miaomiao Zhao
1
School of Instrument Science and Engineering, Southeast University
, Nanjing 210096, China
2
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education
, Nanjing 210096, China
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Jie Yan
Jie Yan
3
Beijing Institute of Electronic System Engineering
, Beijing 100854, China
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Yongjiang Huang
1,2,a)
Xixiang Liu
1,2,b)
Yupeng Zhang
1,2
Miaomiao Zhao
1,2
Jie Yan
3
1
School of Instrument Science and Engineering, Southeast University
, Nanjing 210096, China
2
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education
, Nanjing 210096, China
3
Beijing Institute of Electronic System Engineering
, Beijing 100854, China
a)
E-mail: [email protected]. Tel.: +86(0)18233181870
b)Author to whom correspondence should be addressed: [email protected]. Tel.: +86(0)13952061500
Rev. Sci. Instrum. 91, 125102 (2020)
Article history
Received:
September 15 2020
Accepted:
November 04 2020
Citation
Yongjiang Huang, Xixiang Liu, Yupeng Zhang, Miaomiao Zhao, Jie Yan; A Newton iterative optimization combined with window loop calculation algorithm for estimating accelerometer bias based on gravitational apparent motion with excitation of swinging motion. Rev. Sci. Instrum. 1 December 2020; 91 (12): 125102. https://doi.org/10.1063/5.0029584
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