宽容性体积阵优化波束形成

为适应低频吊放声纳的发展,具有收扩功能的体积阵作为一种重要的水听器基阵结构形式得到了广泛的应用.体积阵的波束形成也受到越来越多的关注,一般利用自适应的方法对体积阵进行波束形成权系数设计.实际应用中由于基阵结构杂乱散射、反射的影响,阵列响应向量存在一定的误差.为保证系统的正常工作,权系数的宽容性格外重要.利用最差情况性能最优化的思想对权系数进行优化,通过实验验证了这种优化的有效性,大大提高了权系数的宽容性,改善了系统工作性能.

Robust volumetric array optimization of beam forming

In order to suit the development of low frequency dipping sonar,the foldaway volumetric array has been widely used.More and more attention has been paid to the volumetric array beam forming;generally the beam forming weight vector is designed by adaptive methods.In practice,due to the array structure,signals received by the sensors will be affected by random scatters and reflectors,and the array responses always have some mismatch.In order to ensure the system performance,the robustness of weight vector is very important.In this paper,the worst-case performance optimization approach has been used to optimize the weight vector,and the effectiveness of this method has been proved by the trial in lake,the results showed that the robust of weight vector and the system performance have been improved greatly.