Investigation on Stochastic Model Refinement for Precise Underwater Positioning

Zhao, Shuang; Wang, Zhenjie; He, Kaifei; Nie, Zhixi; Liu, Huimin; Ding, Ning

doi:10.1109/joe.2019.2935481

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…Conventional-sized piezoelectric transducers have also been widely used in petroleum logging and seismic exploration instruments [ 34 , 35 , 36 ]. In underwater acoustics applications, larger-sized transducers are used to detect acoustic signals propagating over a long distance for real-time tracking and the high-precision positioning of underwater targets [ 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

A Frequency-Dependent Dynamic Electric–Mechanical Network for Thin-Wafer Piezoelectric Transducers Polarized in the Thickness Direction: Physical Model and Experimental Confirmation

Fa,

Liu,

Gong

et al. 2023

Micromachines

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This paper is concerned with electric–acoustic/acoustic–electric conversions of thin-wafer piezoelectric transducers polarized in the thickness direction. By introducing two mechanical components with frequency-dependent values, i.e., radiation resistance and radiation mass, into the equivalent circuit of the thin-wafer piezoelectric transducer, we established a frequency-dependent dynamic mechanic-electric equivalent network with four terminals for an arbitrary given frequency, an enhancement from the conventional circuit networks. We derived the analytic expressions of its electric–acoustic and acoustic–electric conversion impulse responses using the four-terminal equivalent circuit to replace the traditional six-terminal equivalent circuit for a thin-wafer transducer with harmonic vibrational motion. For multifrequency electrical/acoustic signals acting on the transducer, we established parallel electric–acoustic/acoustic–electric conversion transmission networks. These two transmission network models have simple structures and clear physical and mathematical descriptions of thin-wafer transducers for electric–acoustic/acoustic–electric conversion when excited by a multifrequency electric/acoustic signal wavelet. The calculated results showed that the transducer’s center frequency shift relates to its mechanical load and vibration state. The method reported in this paper can be applied to conventional-sized and small-sized piezoelectric transducers with universal applicability.

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Section: Introductionmentioning

confidence: 99%

A Frequency-Dependent Dynamic Electric–Mechanical Network for Thin-Wafer Piezoelectric Transducers Polarized in the Thickness Direction: Physical Model and Experimental Confirmation

Fa,

Liu,

Gong

et al. 2023

Micromachines

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“…In LBL positioning mode or seafloor geodetic network (SGN) calibration, investigations on SSS modeling have garnered considerable attention in terms of functional model establishment [25][26][27][28][29][30] and stochastic model refinement [31,32]. With regard to typical GNSS-acoustic (GNSS-A) data post-processing for seafloor static positioning, the comparatively exact modeling correction method is essentially based on sufficient and repeated observations which are easily available when employing ships, buoys, wave gliders, or unmanned aerial vehicles (UAVs) to continuously conduct GNSS-A surveying towards the static seafloor targets [33][34][35]. However, it is a challenge to establish an accurate model of SSS correction for USBL positioning of dynamic ARVs due to limited observations corresponding to specific locations and times of ARVs.…”

Section: Introductionmentioning

confidence: 99%

Two-Step Correction Based on In-Situ Sound Speed Measurements for USBL Precise Real-Time Positioning

Zhao,

Liu,

Xue

et al. 2023

Remote Sensing

Self Cite

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The ultra-short baseline (USBL) positioning system has been widely used for autonomous and remotely operated vehicle (ARV) positioning in marine resource surveying and ocean engineering fields due to its flexible installation and portable operation. Errors related to the sound speed are a critical factor limiting the positioning performance. The conventional strategy adopts a fixed sound velocity profile (SVP) to correct the spatial variation, especially in the vertical direction. However, SVP is actually time-varying, and ignoring this kind of variation will lead to a worse estimation of ARVs’coordinates. In this contribution, we propose a two-step sound speed correction method, where, firstly, the deviation due to the acoustic ray bending effect is corrected by the depth-based ray-tracing policy with the fixed SVP. Then, the temporal variation of SVP is considered, and the fixed SVP is adaptively adjusted according to the in situ sound velocity (SV) measurements provided by the conductivity–temperature–depth (CTD) sensor equipped at the ARV. The proposed method is verified by semi-physical simulation and sea-trail dataset in the South China Sea. When compared to the fixed-SVP method, average positioning accuracy with the resilient SVP be improved by 8%, 21%, and 26% in the east, north, and up directions, respectively. The results demonstrate that the proposed method can efficiently improve the adaptability of sound speed observations and deliver better performance in USBL real-time positioning.

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Analysis of acoustic ray accessibility for underwater positioning service based on seafloor geodetic network

Zhao,

Xue,

Wang

et al. 2023

2023 IEEE International Conference on Mechatronics and Automation (ICMA)

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Investigation on Stochastic Model Refinement for Precise Underwater Positioning

Cited by 4 publications

References 45 publications

A Frequency-Dependent Dynamic Electric–Mechanical Network for Thin-Wafer Piezoelectric Transducers Polarized in the Thickness Direction: Physical Model and Experimental Confirmation

A Frequency-Dependent Dynamic Electric–Mechanical Network for Thin-Wafer Piezoelectric Transducers Polarized in the Thickness Direction: Physical Model and Experimental Confirmation

Two-Step Correction Based on In-Situ Sound Speed Measurements for USBL Precise Real-Time Positioning

Analysis of acoustic ray accessibility for underwater positioning service based on seafloor geodetic network

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