摘要
为探寻适用于拖曳线列阵声呐的被动测距方法,基于海洋波导的重要特征一低频声场具有稳定可观察的干涉结构,结合波导不变量理论提出了两种被动测距算法。采用双水平阵(元)模型,分别获得各阵(元)的LOFAR图和方位时间历程后,对LOFAR图进行Radorn变换提取干涉条纹的频率时间历程,进而结合各测距算法实现被动测距。并通过仿真研究和定位精度分析,验证了算法的可行性。
Two kinds of passive ranging algorithms are proposed combined with waveguide invariant theory based on the important characteristic of the ocean waveguide that the interference structure is stable and can be observed in the low-frequency acoustic field,in order to explore the passive ranging method suitable for the towed line array sonar.The double arrays（elements） model is adopted,so the LOFARgram and bearing-time records of the each array（element） can be obtained.Then the frequency-time records can be extracted by processing the LOFARgram via Radon transform,so the passive ranging can be achieved combined the corresponding ranging algorithms.And the feasibility of the algorithms has been verified by simulation researches and positioning accuracy analysis.
出处
《声学学报》
EI
CSCD
北大核心
2012年第4期440-447,共8页
Acta Acustica
关键词
干涉条纹
被动测距
低频声场
结构
拖曳线列阵声呐
测距算法
水
时间历程
Acoustic fields
Underwater acoustics
Waveguides
Double arrays
Interference structures
Lofargram
Low frequency
Ocean waveguide
Passive ranging
Positioning accuracy
Radon Transform
Simulation research
Towed line array
Waveguide invariant
