为了研究声压线阵声呐空间增益的影响因素，就同等阵元个数情况下线阵声呐等效阵长与波束形成结果的关系进行仿真分析。首先，建立了直线阵、圆阵、半圆阵和太极阵的声压线阵声呐模型，定义了线阵声呐等效阵长的数学表达式，对线阵声呐等效阵长的进行了对比分析。其次，引入“–3dB波束宽度”概念，通过蒙特卡罗试验，得出了线阵声呐等效阵长与“–3dB波束宽度”之间的反比关系。最后，对多目标情况下的波束形成仿真结果进行对比分析，验证了等效阵长对线阵声呐空间增益的影响关系。
The simulation analysis of relationship between beam forming results and equivalent array length of array sonar has been done, in order to study the factors that influence spatial gain of pressure hydrophone array sonar with a fixed number of arrays. Firstly, the array sonar models of linear array, circle array, semicircular array and tai-ji array have been established. The mathematical expression of equivalent array length is defined and the comparison has been done. Secondly, the conception of -3 dB beam width is defined. The inverse relationship between equivalent array length and -3 dB beam width is obtained through the Monte-Carlo experiments. Finally, the results of beam forming simulation with multiple objective are contrasted and the relationship between spatial gain and equivalent array length is affirmed.
2017,39(9): 123-128 收稿日期：2017-05-10
DOI：10.3404/j.issn.1672-7649.2017.09.024
分类号：TB56
作者简介：王森(1988-),男,博士研究生,研究方向为水声目标识别、水声信号处理
参考文献：
[1] 韩树平, 许兆鹏, 董永峰. 长线阵声纳左右舷分辨仿真研究[J]. 计算机仿真, 2012, 29(11):412-415. HAN Shu-ping, XU Zhao-peng, DONG Yong-feng. Research on simulation of long towed line array's port/starboard discrimination[J]. Computer Simulation, 2012, 29(11):412-415.
[2] 郭伟. 水下监测系统中目标探测若干关键技术研究[D]. 长沙:国防科学技术大学. 2011. GUO Wei. Research on key methods of target detecting for underwater monitoring system[D]. Changsha:National University of Defense Technology. 2011.
[3] 朱丽华. 基于均匀圆阵的DOA算法研究[D]. 石家庄:河北科技大学. 2014. ZHU Li-hua. Research on DOA algorithm based on uniform circular array[D]. Shijiazhuang:Hebei University of Science and Technology. 2014.
[4] WANG Sen, LI Zhi-zhong, DAI Wei-guo, et al. The simulating calculation of left/right ambiguity based on scalar tai-ji array[C]//IEEE ICCSN. 2017.
[5] 李启虎. 声呐信号处理引论[M]. 北京:科学出版社, 2012. LI Qi-hu. An introduction to sonar signal processing[M]. Beijing:Science Press, 2012.
[6] 任鹏飞, 张玉, 邓小波. 一种基于Y阵的MUSIC波达方向估计算法[J]. 无线电工程, 2014, 44(3):54-56. REN Peng-fei, ZHANG Yu, DENG Xiao-bo. MUSIC DOA estimation algorithm based on Y-shaped array[J]. Radio Engineering, 2014, 44(3):54-56.
[7] 张虎, 仝侨. 基于L型阵的二维Root-MUSIC波达方向估计算法[J]. 电子科技, 2015, 28(2):11-13. ZHANG Hu, TONG Qiao. Two-dimensional Root-MUSIC direction estimation based on an L-shaped array[J]. Electronic Science and Technology, 2015, 28(2):11-13.
[8] 李子高, 李淑秋, 闻疏琳. 一种基于独立成分分析的水下宽带信号波达方位估计方法[J]. 兵工学报, 2017, 38(1):114-122. LI Zi-gao, LI Shu-qiu, WEN Shu-lin. A novel ICA-based DOA estimation method for underwater wideband source[J]. ACTA ARMAMENTARⅡ, 2017, 38(1):114-122.
[9] WANG Sen, DAI Wei-guo, LI Hai-tao. Spatial gain research of complex towed array sonar distortion[C]//IEEE ICFST 2017.
