基于改进遗传算法的阵元失效校正方法

Failed Elements Correction Method Based on Improved Genetic Algorithm

阵列天线中阵元失效,其方向图的副瓣电平会升高、主瓣变宽。保留遗传算法前期迭代的最优个体为新初始种群对遗传算法进行改进,以加快收敛速度和防止最佳染色体缺失。并利用基于优势保留的改进遗传算法,针对-40dB的26单元阵列,随机缺失3单元后进行优化,恢复原方向图副瓣水平。结果表明,该算法能够有效减少阵元缺失后方向图的恶化。

The sidelobe level and beamwidth would go up when elements in array antenna are failed.The genetic algorithm is improved by keeping the optimal individuals as the new initial population.This algorithm could speed up the convergence and preserve the best chromosome.In addition,the 26-element array antenna with-40 dB side lobe level and 3 failed elements was corrected by the improved genetic algorithm based on advantage retention so as to restore the sidelobe level of the original pattern.The numerical results demonstrate that the algorithm can effectively reduce the deterioration of pattern.