電容加權(quán)叉指換能器進(jìn)化設(shè)計(jì)

為簡(jiǎn)化電容加權(quán)叉指換能器的設(shè)計(jì)過(guò)程，提出了一種新的設(shè)計(jì)方法。他將電容加權(quán)叉指換能器各指對(duì)的兩加權(quán)電容差值為進(jìn)化對(duì)象，目標(biāo)頻率響應(yīng)特性和待進(jìn)化的電容加權(quán)叉指換能囂的頻率響應(yīng)特性在考慮頻率范圍內(nèi)1 601個(gè)頻率點(diǎn)處最大差值的最小值為進(jìn)化目標(biāo)，通過(guò)排序選擇、交叉和變異等遺傳操作自動(dòng)進(jìn)化出符合任意路定性能要求的電容加權(quán)叉指換能器。進(jìn)化實(shí)驗(yàn)結(jié)果表明，進(jìn)化設(shè)計(jì)得到的電容加權(quán)叉指換能囂頻率響應(yīng)幾乎與任意給定的頻率響應(yīng)特性重疊，進(jìn)化設(shè)計(jì)方法正確、高效、實(shí)用性強(qiáng)。

A new method tO design capacitive weighted interdigital transducer is adopted for simplicity，of which differential value of two weighted capacitive coupled a pair of fingers is regarded as evolutionary object and the minimum value of maxima1 differentia1 value
between objective frequency response and frequency response of capacitive weighted interdigital transducer on 1601 frequency value in corresponding frequency rang a5 evolutionary target．The capacitive weighted interdigital transducer is obtained after ranking selection，crossover and mutation operation．Evolutionary experiment shows that objective frequency response is near coincidence tO frequency re—sponse of capacitive weighted interdigital transducer obtained by evolutionary design．The evolutionary design is correct，efficient andpractica1．