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Study on the influence of the subsurface buoy＇s vibration on the vector sensor due to ocean current

High Technology Letters 2014年第3期20卷 223-229页

作者：师俊杰 Sun Dajun Lv Yunfei Lan Hualin Mei Jidan Key Laboratory of Underwater Acoustic Technology Underwater Acoustic Engineering College HarBin Engineering University Harbin 150001 P. R. China

Subsurface buoy systems,especially equipped with the vector sensor,have more and more extensive applications in military and civilian ***,their acoustic performances are constrained by the vibration resulting from the unavoidable ocean current in some *** influence of such vibrations is quantitatively analyzed by means of modeling the simplified models of two deployment configurations involving the positive buoyant buoy and neutral buoy *** corresponding formulas are deduced respectively for the deployment configuration buoy systems in the motion state *** the simulation software is developed and some numerical simulations are put up via the Runge-Kutta *** simulation results and theoretical analysis indicate that the neutral buoy will be an excellent design protocol in engineering application in comparison with the positive buoyant buoy.

关键词： subsurface buoy system vector sensor ocean current neutral buoy

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Application of frequency estimation algorithm based on a single vector sensor in underwater acoustic communication

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Journal of Marine Science and Application 2006年第3期5卷 46-50页

作者： QIAO Gang ZHANG Xiao-ping ZHAO Xin College of Underwater Acoustic Engineering Harbin Engineering University Harbin 150001 China

A method of high resolution frequency estimation based on a single vector sensor using ESPRIT （Estimating Signal Parameters via Rotational Invariance Techniques） algorithm is proposed and applied to the underwater acoustic （UWA） communication system of frequency modulation. Higher resolution frequency estimation can be obtained by this algorithm using fewer snapshots comparing with the sound intensity frequency estimation. Results of simulation and lake experiment show that the proposed algorithm can improve the communication data rate and reduce the bandwidth of the system. Because higher signal-to-noise ratio （SNR） is demanded, range UWA communication at oresent. this algorithm can be used in high speed short

关键词： vector sensor ESPRIT algorithm frequency estimation sound intensity

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DESIGN AND SIMULATION OF RIGIDLY MOUNTED ACOUSTIC vector sensor

DESIGN AND SIMULATION OF RIGIDLY MOUNTED ACOUSTIC VECTOR SEN...

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2015全国压电和声波理论及器件技术研讨会

作者： Hao ZHANG Liang-jun XU Zhi-gang KONG Automation School Beijing University of Posts and Telecommunications

According to the inconvenience of underwater co-oscillating acoustic vector sensor’s suspension systems which consist of elastic elements and rigid support structure around the vector sensor,a rigidly mounted acoustic vector sensor for measuring pressure gradient is introduced in this *** basic structure of the rigidly mounted acoustic vector sensor consists of two primary components:disk-shape piezoelectric sensing element and cylinder part fixed with the sensing *** the cylinder part is stimulated by sound wave,the piezoelectric sensing element transforms the resultant strain into a voltage output *** finite element model of the acoustic vector sensor was established by ANSYS,and the influence of geometric and material parameters on the characteristics of the acoustic vector sensor was analyzed based on its finite element model.

关键词： vector sensor Rigidly mounted Piezoelectric Pressure gradient

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Joint estimation of DOA, frequency, and polarization based on cumulants and UCA

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Journal of Systems Engineering and Electronics 2007年第4期18卷 704-709页

作者： Huang Jiacai Shi Yaowu Tao Jianwu Automation Dept. Nanjing Institute of Technology Nanjing 211167 P. R. China Coll. of Communication Jilin Univ. Changchun 130025 P. R. China Univ. of Aeronautics Changchun 130022 P R. China

A joint estimation algorithm of direction of arrival （DOA）, frequency, and polarization, based on fourth-order cumulants and uniform circular array （UCA） of trimmed vector sensors is presented for narrowband non-Gaussian signals. The proposed approach, which is suitable for applications in arbitrary Gaussian noise environments, gives a closed-form representation of the estimated parameters, without spectral peak searching. An efficient method is also provided for elimination of cyclic phase ambiguities. Simulations are presented to show the performance of the algorithm.

关键词： polarization direction of arrival frequency fourth-order cumulant uniform circular array vector sensor

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