A method, device, computer and storage medium for joint correction of attitude and amplitude and phase errors of small-size vector array

By constructing a small-size vector array and signal receiving system for vector hydrophones, the array attitude and sound source azimuth angle are obtained, and amplitude-phase error correction is performed, which solves the joint correction problem of array attitude and amplitude-phase error in small-size vector arrays, and achieves high-precision beam formation.

CN115308750BActive Publication Date: 2025-03-25HARBIN ENG UNIV
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Patent Information

Application Number
CN202210735829.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-27
Publication Date
2025-03-25
Estimated Expiration
2042-06-27

AI Technical Summary

Technical Problem

The prior art lacks a correction method that considers both the unknown array attitude and the fixed amplitude phase error. Especially in small-size vector arrays, it is difficult to effectively correct the joint correction of the array attitude and amplitude phase error.

Method used

By constructing a small-size vector array and signal receiving system for vector hydrophones, the vibration speed of the tilted attitude of the array body is obtained, and the vibration speed of the horizontal attitude of the array body is obtained through nonlinear equations, and then coordinate transformation is performed to obtain the three-dimensional array of vector hydrophones. The stereo array is used for beam scanning, the azimuth angle estimate value is obtained, and finally the amplitude phase error is actively corrected for the stereo array to realize the joint correction of the array posture and amplitude phase error.

Benefits of technology

Effective joint correction of unknown array posture and fixed amplitude phase error of small-size vector arrays is achieved, which improves the beamforming accuracy and stability of the array and avoids errors caused by attitude sensors.

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Abstract

A method, device, computer and storage medium for joint correction of attitude and amplitude and phase errors of a small-sized vector array relate to the field of sonar array processing. The method solves the problem that the prior art lacks a correction method that simultaneously considers the unknown array attitude and fixed amplitude and phase errors. The method comprises: constructing a small-sized vector array and a signal receiving system of vector hydrophones; obtaining the vibration velocity of the horizontal attitude and tilt attitude of the array of the small-sized vector array according to the small-sized vector array and the signal receiving system; constructing a nonlinear equation group according to the vibration velocity of the horizontal attitude of the array and solving the nonlinear equation group; performing coordinate transformation according to the solution of the nonlinear equation group to obtain a three-dimensional array of vector hydrophones; scanning the three-dimensional array of vector hydrophones to obtain an estimated value of the azimuth angle of the sound source; performing active amplitude and phase error correction on the three-dimensional array according to the estimated value of the azimuth angle of the sound source to obtain a joint correction of the attitude and amplitude and phase errors of the array. The method is applicable to the field of correction of small-sized vector arrays.
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