稀布同心圆环阵列的优化设计

针对有阵列孔径以及阵元间隔约束的均匀激励稀布同心圆环阵列综合问题,提出了一种改进的差分进化算法,首先,构造了圆环数量的映射函数,解决了圆环数量不同的个体同时参与优化迭代的问题;其次,结合差分进化算法和和声搜索算法,引入随机噪声以提升种群的多样性,建立了动态变化的种群保留概率和变异概率模型,提高了优化算法的全局搜索能力;最后,进行了仿真实验,实验结果证明了算法的有效性。

Optimum design of sparse concentric rings array

To solve the problem of synthesizing the uniformly excited sparse concentric ring arrays with the constraints, which include aperture and minimum elements spacing, an improved differential evolution algorithm is proposed. Firstly, a mapping function is set up to take individuals with unequal rings number into optimization. Secondly, the differential evolution is combined with the harmony search method, and the diversity of individuals has been improved by inserting random noise. Furthermore, dynamic model of crossover probability and mutation probability is established to improve the global optimal performance. Finally, the effectiveness of the proposed method is verified by simulations.