Iterative correction method of beam incident angle for ultra-short baseline underwater acoustic positioning

Gao Xingguo; Wei Jinjin; Xin Mingzhen; Chang Zengliang; Wu Chaoyi; Qu Meng

doi:10.12284/hyxb2023122

Volume 45 Issue 9

Sep. 2023

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Article Navigation > Haiyang Xuebao > 2023 > 45(9): 168-176

Gao Xingguo，Wei Jinjin，Xin Mingzhen, et al. Iterative correction method of beam incident angle for ultra-short baseline underwater acoustic positioning[J]. Haiyang Xuebao，2023, 45(9)：168–176 doi: 10.12284/hyxb2023122

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Iterative correction method of beam incident angle for ultra-short baseline underwater acoustic positioning

doi: 10.12284/hyxb2023122

Gao Xingguo^1
,,
Wei Jinjin^{2, 3
,
,},
Xin Mingzhen^{2, 4},
Chang Zengliang¹,
Wu Chaoyi²,
Qu Meng¹

1.
Shandong Electric Power Engineering Consulting lnstitute Corp., LTD, Jinan 250013, China
2.
College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
3.
Zhejiang Institute of Hydraulics and Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, China
4.
Key Laboratory of Oceanic Surveying and Mapping, Ministry of Natural Resources, Qingdao 266590, China

Received Date: 2022-09-02
Rev Recd Date: 2023-04-19

Available Online: 2023-08-24

Publish Date: 2023-09-30

Abstract

Abstract

The inhomogeneity of the seawater medium causes the refraction effect in the sound wave propagation process. The ultra-short baseline system using the planar acoustic array will be affected by this phenomenon during the measurement process, which will cause large errors in the measurement results. The sound ray tracking method is usually used to correct the sound ray by using the measured sound velocity profile. Accurate beam incident angle is the prerequisite to ensure the accuracy of sound ray tracking, but the ultra-short baseline system does not directly measure the beam incident angle but uses the approximate incident angle derived from the acoustic phase difference for sound ray tracking will cause a certain loss of accuracy. To solve the above problems, this paper proposes an iterative correction method of beam incidence angle for ultra-short baseline underwater acoustic positioning. Based on constant gradient acoustic ray tracking, the iterative calculation relationship between beam incidence angle and propagation time is constructed, the Aitken acceleration method is used to quickly solve the nonlinear equation of the beam incidence angle. Simulation experiments prove that the method proposed in this paper can accurately calculate the beam incident angle and target position, and effectively eliminate the influence of refraction effects on ultra-short baseline underwater positioning.
- ultra-short baseline,
- constant gradient sound ray tracing,
- incident beam angles,
- sound velocity profile,
- Aitken acceleration method

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References(33)

References

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