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

Radiation noise simulation method of underwater acoustic target maneuvering state

A radiation noise and target maneuvering technology, applied in the field of signal processing, can solve problems such as lack of, difficult to adapt to radiation noise simulation, etc.

Active Publication Date: 2019-08-13
SOUTHEAST UNIV
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of comprehensive consideration and design of signal parameters related to target speed changes such as noise spectrum level, line spectrum frequency, and modulation depth in the traditional target radiation noise simulation method, it is difficult to adapt to the radiation noise simulation of the target maneuvering state

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
  • Radiation noise simulation method of underwater acoustic target maneuvering state
  • Radiation noise simulation method of underwater acoustic target maneuvering state
  • Radiation noise simulation method of underwater acoustic target maneuvering state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0094] There is a surface ship with a displacement of 3,000 tons, a linear acceleration of 0.03 knots per second on the water surface, and a maximum speed of 30 knots. The velocity profile was sampled at a sampling rate of 32000Hz.

[0095] First, according to formula (1), the total sound level changing with speed is solved, and then put into formula (3) and formula (4) to obtain the continuum component model. Take K in this example 0 =0.5,K 1 =6.

[0096] Then, solve the inverse Fourier transform of the model, and then use the Levinson-Durbin recursive solution to formula (6) to obtain the shaping filter coefficients of the continuum model. Exciting the filter with unit white noise yields the target noise continuum portion.

[0097] Then, according to the set modulation spectrum parameters into formula (9), formula (10), formula (11) can get the signal of the superposition of continuum spectrum and modulation spectrum.

[0098] Then, according to the set stable line spec...

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 discloses a radiation noise simulation method of an underwater acoustic target maneuvering state, which comprises the following steps: step 1: establishing a target radiation noise continuous spectrum model and setting target basic parameters; step 2: calculating a continuous spectrum part changing along with the speed based on the target noise continuous spectrum model and the basicparameters; step 3: calculating a signal modulation frequency changing along with the speed according to the basic parameters, and calculating a modulation spectrum component in the target radiationnoise; step 4: calculating a stationary line spectrum part of the target radiation noise; step 5: calculating a target radiation noise line spectrum part changing along with the speed; and step 6: superposing and splicing the three parts obtained by calculation in the abve steps to finally obtain a radiation noise simulation signal of the underwater acoustic target maneuvering state.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to a method for simulating radiation noise of an underwater acoustic target maneuvering state. Background technique [0002] Due to the limited conditions, the cost of obtaining the actual underwater acoustic target radiation noise signal is relatively high, so the underwater acoustic target radiation signal simulation is often used to study the characteristics analysis and signal processing algorithm of the underwater acoustic target signal. The radiated noise under the maneuvering state of the target contains characteristic quantities that change with time. The acoustic characteristics of the underwater acoustic target are modeled and simulated when the maneuver changes, and the target radiated noise that can reflect the characteristics of the noise change when the underwater acoustic target maneuvers changes is simulated. , which is of great significance to the detection and iden...

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): G01S7/539
CPCG01S7/539
Inventor 罗昕炜饶柏斌方世良
Owner SOUTHEAST UNIV