基于混合算法的光学合成孔径成像系统孔径优化

结合模拟退火算法和遗传算法的优点,在遗传算法中加入模拟退火算子,运用这种混合算法对子孔径结构进行了优化。以阵列的子调制传递函数覆盖点间距最大化及最小冗余度来设计目标函数,实现了单圆周孔径阵列和双圆周孔径阵列的优化排列。使用仿真程序对优化阵列的光学传递函数进行了分析,将优化结果与相同子孔径数目的单圆周结构进行仿真实验和比较。结果表明,采用这种混合算法是可以很好的解决光学合成孔径结构的优化问题,优化结果接近全局最优解,优化后的双圆周阵列接近Golay阵列,具有更大的实际空间截止频率。

Aperture Optimization of Optical Synthetic Aperture Imaging System Based on Hybrid Algorithm

Considering the advantages of simulated annealing algorithm and genetic algorithm,the simulated annealing operator is added into the genetic algorithm,this new algorithm is derived for the model and process of structure’s optimization.The objective function was designed by maximizing the distances between u-v coverage dots and minimizing redundant array.The optimized single circular aperture structure and double circular structures was obtained and compared with the other array configurations with the same sub aperture number.Results show that this new algorithm can resolve the synthesis aperture array optimization well,the optimization results are close to the global optimal solution.The optimized double circle array is close to Golay arrays and has higher practical cut off spatial frequency.