【摘要】 对于均匀间隔线列阵,由采样定理可知,当阵元间距超过信号波长的一半时,指向性图会产生与目标等高的栅瓣。为了获得高分辨率,同时避免栅瓣出现,需要大量的传感器。为了减少设备复杂度,可以采用稀疏布阵技术,以较少的阵元获得较高的分辨力。将模拟退火算法应用到稀疏矢量水听器阵的设计中。通过优化阵元位置控制指向性图,可以获得无栅瓣的指向性图。给出了优化后的稀疏矢量阵与均匀间隔矢量阵的指向性图比较。更多还原

【Abstract】 For uniform linear arrays,grating lobes will appear when the distance between two adjacent sensors is beyond half the wavelength of the signal.According to traditional methods,large amount of sensors are needed to eliminate grating lobes.Sparse array technique is used to reduce sensors and high performance is achieved.Simulated annealing algorithm is applied to the design of acoustic vector sensor arrays.By optimizing the elements’ position control,a directivity pattern without grating lobes is achieved.更多还原