CAJ | 학술논문

介绍了一种利用分布声反射换能器 (DART)结构的双通道谐振单相单向换能器(RSPUDT)滤波器的设计方法.滤波器中2个通道的4个换能器结构完全不同,分别对它们进行优化设计,使结构具有更大的自由度,因而获得更好的性能.在与单通道RSPUDT滤波器相同指标下,双通道结构可实现小的长度和体积.采用随机优化算法找到换能函数和反射函数的全局最优解,从而避免了结构收敛到局部最小点.实验分析表明,模拟结果和实验结果相吻合.
개소료일충이용분포성반사환능기 (DART)결구적쌍통도해진단상단향환능기(RSPUDT)려파기적설계방법.려파기중2개통도적4개환능기결구완전불동,분별대타문진행우화설계,사결구구유경대적자유도,인이획득경호적성능.재여단통도RSPUDT려파기상동지표하,쌍통도결구가실현소적장도화체적.채용수궤우화산법조도환능함수화반사함수적전국최우해,종이피면료결구수렴도국부최소점.실험분석표명,모의결과화실험결과상문합.
We presents a general design method of two tracks RSPUDT filters using DART structure.The structures of four IDTs in two tracks are different.Optimization algorithm is implemented respectively in the structure, which makes the design more flexible.Better performance is obtained though proper design. Comparison of the single track with two tracks RSPUDT filters shows that the latter have advantages of smaller length and volume. Stochastic optimization algorithm is used to search the global solution of transduction and reflection function, which avoids the local minimum. Experimental results show good agreement with the simulation results.