Research On Vector Hydrophone Location Technology In Waveguide Environment

Underwater acoustic target positioning technology plays an important role in both civil and military fields.How to effectively locate underwater acoustic targets in the marine waveguide environment has always been a key research direction in the underwater acoustic industry.The traditional underwater acoustic positioning method ignores the influence of the waveguide environment,resulting in poor positioning performance in the marine waveguide environment.In view of this: This article starts with the marine environment model,combined with the underwater acoustic signal propagation model,focuses on the transmission function information of the marine channel,and studies the location of the sound source in the waveguide environment.The specific work is as follows:Introduced the underwater acoustic receiving model in the waveguide environment,and explained the underwater acoustic propagation process.The vector sound field is modeled using normal wave theory and ray acoustic theory,respectively,and the characteristics of the sound field are analyzed,which provides a basis for the subsequent research on the positioning algorithm.The vector matching field positioning technology and the vector time reversal mirror positioning technology are studied.The real sound field phase information contained in the received signal is matched with the copy field phase information.At the same time,a more in-depth study on the method of matching is done.According to the working principle,the vector matching field positioning and vector time reversal mirror positioning simulation,error analysis and environmental mismatch impact analysis were carried out,and the feasibility and practicability of the matching field positioning technology were verified by using experimental data.Aiming at the difficulties of the unknown,difficulty and error of the actual marine environment,the GRNN sound source localization technology is studied,and the neural network training is performed using the spectrum information of the received training set signal.Obtain the best diffusion factor and substitute it into the test set signal to locate the underwater acoustic target.The vector GRNN localization technology is studied.The unique array flow pattern and the common point of vector sensors are used to receive the sound pressure and vibration speed information.It can effectively reduce the excellent characteristics of isotropic noise and improve the localization performance of the target sound source.Finally,the feasibility and practicability of vector GRNN positioning technology are verified by experimental data.The research shows that in the marine waveguide environment,matching field positioning technology and time-reversal mirror positioning technology can more effectively use the sound field information and improve the sound source localization performance in the waveguide environment.Combining the vector signal processing idea with the above two algorithms,compares Sound pressure processing has a good positioning effect;for the harshness of the above two algorithms on ocean parameters and sound field modeling requirements,the GRNN positioning technology is used to learn ocean channel knowledge,which improves the positioning accuracy and robustness,and also greatly improves the practicality.