Unlock instant, AI-driven research and patent intelligence for your innovation.

Weighted airspace processing towed line array sonar platform radiation noise limit response suppression method

A technology for airspace processing and radiated noise, which is applied in complex mathematical operations and other directions, and can solve problems such as enhancing the detection performance of towed array sonar targets.

Active Publication Date: 2021-07-09
PLA DALIAN NAVAL ACADEMY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a weighted airspace processing dragline array sonar platform radiation noise limited response suppression method, which solves the technical problem of processing the array data received by the dragline array sonar, tracking and suppressing platform radiation in real time in the array data preprocessing stage Noise, enhanced drag line array sonar target detection performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Weighted airspace processing towed line array sonar platform radiation noise limit response suppression method
  • Weighted airspace processing towed line array sonar platform radiation noise limit response suppression method
  • Weighted airspace processing towed line array sonar platform radiation noise limit response suppression method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The specific implementation example of the present invention is described in detail below in conjunction with scheme and accompanying drawing.

[0046] Such as figure 1As shown in the figure, the sonar array is located behind the ship platform, and the radiation noise from the platform reaches the array through multiple paths. The sonar array detects the far-field plane wave signal, and the far-field plane wave signal is incident from the horizontal direction.

[0047] figure 1 Among them, x, y, and z correspond to three different axes respectively, d represents the element spacing of the sonar array, L is the distance between the platform radiation noise and the first element of the array, h 1 is the depth of platform radiation noise, h 2 is the depth of the sonar array.

[0048] The iterative algorithm based on the response weighting criterion is as follows:

[0049] Step 1: Let iteration count k=1.

[0050] Discretize the far-field plane wave signal detection a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of underwater acoustic detection, relates to a towed line array sonar signal processing technology, and discloses a weighted airspace processing towed line array sonar platform radiation noise limited response suppression method. The invention includes designing an optimal spatial matrix filter by utilizing a plane wave array manifold, a platform radiation noise copy vector and a weighting coefficient matrix. Through a weighting coefficient matrix iteration mode, the effect that the spatial matrix filter balances the response of a far-field plane wave signal in each direction under the condition that the overall response of platform radiation noise is used as a constraint condition is realized.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic detection, relates to a towed line array sonar signal processing technology, in particular to a weighted airspace processing towed line array sonar platform radiation noise limited response suppression method. Background technique [0002] Target detection in the ocean mainly relies on the radiation noise of the target. Target positioning can be achieved by using towed line array sonar. The sonar hydrophone array is located hundreds to thousands of meters behind the ship or submarine and is connected by cables. Although the distance between the ship and submarine platform and the hydrophone array is relatively long, due to the limitation of various conditions, the length of the cable is limited, and the radiation noise of the platform constitutes short-range strong interference near the end of the towing line array, and forms a detection blind zone , will affect the target detection p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G06F17/16
CPCG06F17/11G06F17/16
Inventor 韩东杨美娇魏尚飞徐池王永超
Owner PLA DALIAN NAVAL ACADEMY