基于遗传算法的变迹叉指换能器进化设计

Evolutionary Design of Apodised Transducers Based on Genetic Algorithm

为简化变迹叉指换能器设计过程,提出了一种新的变迹叉指换能器的设计方法,它以叉指换能器的中心频率处的插入损耗和旁瓣电平作为寻优目标,叉指换能器的指条长度作为基因,通过选择、交叉和变异等遗传操作,自动生成叉指换能器的所有指条长度,并给出进化得到的变迹叉指换能器的频率响应。实验结果表明,提出的设计方法正确有效,所编制的进化设计软件包实用性强。

A new design approach for apodised transducers is adopted. The size of all fingers of apodised interdigital transducers , which is regarded as gene ,is obtained by optimizing insertion loss in center frequency and sidelobe level using selection, crossover and mutation operation. Its frequency response is taken also. The experiment indicates that the approach is correct and efficiency and the software for evolutionary design are worth to generalizing.