一种小型矢量阵优化波束方法研究

在小型声纳平台中由于单个矢量水听器所含的振速传感器具有自然指向性,其组成的矢量阵较传统水听器阵有优越性,但单个矢量水听器的自然指向性波束较宽,组成的矢量阵的-3dB束宽和旁瓣级不够理想。该文利用单个矢量传感器的声压、振速信息联合处理形成较好指向性,并用于矢量阵获得良好的阵列效果,同时分析了该方法对线阵和圆阵的影响。仿真结果表明当线阵的阵元间距和圆阵半径都为0．5米时,矢量阵接收低频信号所形成的波束图中-3dB束宽在以25°内,第一旁瓣级低于-60dB,这证明了该文的方法是有效的。

Beamforming Optimization of a Small Acoustic Vector Sensor Array

The acoustic vector senor array performs better than traditional scalar hydrophone in small sonar system because the particle velocity sensor in the acoustic vector sensor has natural directivity. However , the natural directivity of a single acoustic vector senor is not sharp enough , so the vector array has bad performance . The paper presents that using pressure and particle velocity combined processing on a single vector sensor has better directivity, and the formed vector array is of good performance .- The effects on linear array and circular array are analyzed with this method . The simulation indicates that the new directivity - 3dB beamwidth is within 25 degree and the first sidelobe grade is under - 60dB when the interval of linear array and the radius of circular array are both 0.5 meter. So this method in this paper is effective .