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Research on the Characteristics of Acoustic Vector Field with Baffle and Vector Signal Processing Technology

Author: ZhangWei
Tutor: ZhangLanYue
School: Harbin Engineering University
Course: Underwater Acoustics
Keywords: Vector Hydrophone Baffle Sound field measurements Vector array signal processing
CLC: TB565.1
Type: Master's thesis
Year: 2010
Downloads: 52
Quote: 0
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Abstract


Vector hydrophone with its many advantages , is widely used in the field of underwater acoustic measurement and detection . Made the basis of a large number of research , is expected The core vector hydrophone sonar equipment to further improve the performance of underwater acoustic equipment . However , sonar generally used in submarines , torpedoes , mines and other underwater carrier belonging to the use of the limited space , it will be the impact of the installation of carrier scattering field of underwater acoustic equipment performance . The baffle can be regarded as some sort of shape underwater vehicle , the basic problem of the the vector sound field in the case have baffle vector hydrophone receiver performance vector array signal processing technology to carry out theoretical and experimental research . Baffle near field of underwater the scattering vector sound field distribution and the impact of vector hydrophone . Several typical baffle , for example , are derived each component of the expression of the scattering field under different boundary conditions , and on the the different baffle conditions under scattering field as well as vector hydrophone amplitude frequency characteristics , phase-frequency characteristics and receive directional change theory analysis and simulation . On this basis , the use of the finite element method in Matlab PED toolbox to investigate the presence of different baffle plane wave incident at an arbitrary angle scattering field distribution . Secondly, baffle array DOA estimation performance , including sound hold the line and conventional vector array beam forming , the MVDR beamforming subspace decomposition orientation estimation techniques to the Underwater Acoustic actual application for the background for scattering field of an infinite plane baffle theoretical analysis and simulation , and analysis of the impact of different baffle vector hydrophone array performance array element by adjusting the space distribution to improve the performance of DOA estimation . Finally , in a pool of different baffle scattering measurements of the sound field test study , to verify the theoretical analysis , for vector hydrophone Underwater Acoustic applications provide an experimental basis .

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Underwater Acoustics > Underwater acoustic instruments and equipment > Underwater acoustic transducer , the hydrophone
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