Small-aperture-array-based high-precision underwater target passive positioning method

Abstract

The invention provides a small-aperture-array-based high-precision underwater target passive positioning method. A submarine surveying array and a shore-based integrated processor are arranged. The positioning method comprises the following steps that: S1, a submarine surveying array is arranged at a sea area; S2, when a target enters an effective acoustic effect distance of the submarine surveying array, a corresponding array receives radiation noise of the target and returns the noise to the shore-based integrated processor; S3, the shore-based integrated processor carries out processing on data returned by the signal array; and S4, localization is carried out finally. Because of the small aperture of the array, the system cost and the engineering practical difficulty are substantially reduced; advantages of high robustness formed by conventional wave beams of the scalar hydrophone array and high direction-finding precision of the vector hydrophone are utilized comprehensively; the positioning precision is guaranteed with good robustness; on the basis of combinations of each two arrays, a method of pseudo solution rejection with voting by a show by hands is implemented and thus multiple targets can be identified, thereby substantially improving the passive positioning capability of the underwater target.

Description

technical field [0001] The invention relates to the technical field of underwater target positioning, in particular to a high-precision underwater target passive positioning method based on a small-aperture array. Background technique [0002] With the continuous progress and development of underwater acoustic technology, the underwater activities carried out by human beings are becoming more and more frequent. In the fields of marine resource exploration, marine biological dynamic monitoring, underwater vehicle positioning and navigation, etc., the high-precision positioning of underwater targets is particularly important. At present, the commonly used high-precision underwater target passive positioning methods mainly use large-aperture arrays and specific high-resolution array processing algorithms. Increasing the aperture of the array will increase the difficulty of engineering implementation, and if the aperture of the array is too large, the spatial correlation of the...

AI Technical Summary

Problems solved by technology

Enlarging the array aperture will increase the difficulty of engineering implementation, and if the array aperture is too large, the spatial correlation of the signal will decrease, which will reduce the detection accuracy; the high-resolution array processing algorithm is less robust, and the mismatch of prior conditions will leading to a sharp drop in processing performance

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