Vector circle array acoustic pressure and vibration velocity combined direction finding method on cylindrical form baffle condition

Abstract

The invention provides a vector circle array acoustic pressure and vibration velocity combined direction finding method on cylindrical form baffle condition. The method comprises the following steps: obtaining acoustic pressure array elements domain signal and vibration velocity array elements domain signal; constructing acoustic pressure array elements domain signal pretreatment matrix Tp and vibration velocity array elements domain signal pretreatment matrix Tv respectively according to array models; utilizing pretreatment matrix to carry out pretreatment on the acoustic pressure array elements domain signal and the vibration velocity array elements domain signal to generate an acoustic pressure phase modal domain signal and a vibration velocity phase modal domain signal respectively; utilizing the acoustic pressure phase modal domain signal and the vibration velocity phase modal domain signal to generate cross covariance matrix Repv; utilizing the cross covariance matrix Repv to carry out orientation estimation, and outputting an estimation result. According to the invention, the application of vector sensor on cylindrical form baffle condition is realized, and the method in the invention can be widely used in underwater acoustics and aeroacoustics.

Description

technical field [0001] The invention relates to a lateral method, in particular to a method for joint direction measurement of vector circular array sound pressure vibration velocity under the condition of a cylindrical baffle. Background technique [0002] Since the performance of the vector hydrophone has been greatly improved compared with the traditional sound pressure sensor, it has been successfully used in many complex application backgrounds abroad. As early as the 1950s, the United States successfully developed the radio sonobuoy ocean monitoring system AN / SSQ-53 based on vector hydrophones, and then successively developed its improved AN / SSQ-62 and AN / SSQ- 72B. Russia used to be at the international leading level in vector hydrophone technology. The vector hydrophone low-noise measurement system developed in the 1980s has been used for a long time in the Sea of ​​Japan, Sakhalin Island and the waters near the Kamchatka Peninsula. At present, foreign countries hav...

AI Technical Summary

Problems solved by technology

However, there is still a lack of research on basic issues such as the distribution of the vector sound field under the condition of the baffle, the characteristics of the vector hydrophone receiving sound waves, and the corresponding signal processing theory. The new sonar based on the vector hydrophone has not been successfully used on ships.

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