鱼雷浅海海底混响建模与仿真

董仲臣; 李亚安; 金彦丰

doi:10.11993/j.issn.1673-1948.2013.02.005

鱼雷浅海海底混响建模与仿真

doi: 10.11993/j.issn.1673-1948.2013.02.005

1.
西北工业大学航海学院, 陕西西安, 710072
2.
中国人民解放军91388部队, 广东湛江, 524022

基金项目: 国家自然科学基金(51179157)；国家自然科学基金(51179158)

详细信息

作者简介:
董仲臣(1979- ), 男, 在读硕士, 主要研究方向为水声信号处理和潜艇作战系统作战效能分析.

中图分类号: TJ630.1
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- 被引次数: 0
出版历程
- 收稿日期: 2012-07-18
- 修回日期: 2012-08-21
- 刊出日期: 2013-04-20

Shallow Seafloor Reverberation Modeling and Simulation of Torpedo

1.
College of Marine Engineering, Northwestern Polytechnical University, Xi′an 710072, China
2.
91388th Unit, The People′s Liberation Army of China, Zhanjiang 524022, China

摘要

摘要: 为了实现鱼雷浅海海底混响仿真, 并体现鱼雷运动对混响信号的影响, 提出了一种直观、易于实现的海底混响仿真方法。该方法把产生混响的海底划分成若干散射单元, 并把散射单元等价为系统, 采用连续波(CW)信号和线性调频(LFM)信号作为鱼雷的主动声信号。采用该方法进行海底混响仿真, 可以根据需要把散射单元划分到足够小, 因此鱼雷相对每个散射单元的多普勒频移相同, 从而比较准确的体现了鱼雷运动对混响信号的影响; 同时, 把散射单元等价为系统, 可以利用卷积进行混响信号的计算。仿真结果表明, 该方法物理意义清晰, 仿真简单易行, 仿真混响信号的频谱特性与混响的基本理论相符, 充分验证了该方法的有效性。
- 鱼雷 /
- 浅海海底混响 /
- 散射单元 /
- 多普勒频移
Abstract: To simulate the torpedo reverberation on shallow seafloor and reveal the effect of torpedo motion on the re-verberation signal, a seafloor reverberation simulation method is presented. In this method, the seafloor generating re-verberation is divided into several scattering units, and each scattering unit is equivalent to a system. Continuous wave(CW) signal and linear frequency modulation(LFM) signal are taken as torpedo active acoustic signal. In seafloor reverberation simulation, the scattering units can be small enough to keep the Doppler frequency shift produced by tor-pedo motion in each scattering unit is the same, thus the effect of torpedo motion on reverberation signal is revealed. Because each scattering unit is equivalent to a system, convolution can be used to compute reverberation signal. Simula-tion results show that the present method is of clear physical meaning and simple calculation. Moreover, the spectrum characteristic of the simulated reverberation signal is consistent with the basic theory of reverberation, verifying the validity of the method.
- torpedo /
- shallow seafloor reverberation /
- scattering unit /
- Doppler frequency shift

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参考文献(10)

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