螺线空间阵性能研究

为使水下测试声阵拥有较强的抗干扰能力，常要求阵列具有较低的旁瓣。该文提出了一种螺线空间阵设计方法，可利用螺线结构的空间稀疏分布特性，大幅降低体积阵的旁瓣高度，提高对水下目标的方位估计能力。文中给出了螺线空间阵的构造方法和阵元坐标参数，并与圆柱阵、双锥阵等常规体积阵进行了指向性、方位估计能力、阵增益的对比，仿真结果表明螺线空间阵在水平方向上的指向性旁瓣最低、最平坦，对目标进行方位估计时的伪峰高度最低，目标的方位估计能力相比双锥阵、圆柱阵提升显著。

Study on the performance of spiral space array

In order to make the underwater test acoustic array have strong anti-interference ability, the array is often required to have a low side lobe. In this paper, a design method of spiral space array is proposed, which can greatly reduce the sidelobe height of volume array and improve the bearing estimation ability of underwater targets by taking advantage of the sparse spatial distribution characteristics of spiral structure. In this paper, the construction method and element coordinate parameters of the spiral space array are given, and the directivity, bearing estimation ability and array gain are compared with the conventional volume array such as the cylindrical array and the biconical array. The simulation results show that the directional sidelobe of the spiral space array is the lowest and the most flat in the horizontal direction, and the false peak height is the lowest when estimating the target''s bearing, and the bearing estimation ability of the target is significantly improved compared with the biconical array and the cylindrical array.