Kramers-Kronig transforms calculation with a fast convolution algorithm

被引:30
作者
Bruzzoni, P
Carranza, RM
Lacoste, JRC
Crespo, EA
机构
[1] CNEA, Unidad Actividad Mat, RA-1650 San Martin, Buenos Aires, Argentina
[2] Univ Nac Comahue, Dept Fis, Fac Ingn, RA-8300 Neuquen, Argentina
关键词
Kramers-Kronig; FFT; EIS; transfer function; hydrogen permeation;
D O I
10.1016/S0013-4686(02)00677-1
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Kramers-Kronig transforms (KKT) constitute a powerful tool to validate experimental impedance data. A new algorithm, containing a Fast Fourier Transform (FFT) sub-routine, for the numerical calculus of the KKT has been developed. This algorithm is based in the convolution theorem and it uses only two FFT calculi. It was finally tested in the validation of an experimental transfer function for hydrogen permeation into an iron membrane. Unlike common algorithms for numerical integration, this algorithm allows the calculation of all frequencies at the same time at a high speed using a regular frequency interval for the whole calculation with the same or even higher precision. The FFT sub-routine is accessible in all languages so that the use of this code is very simple. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:341 / 347
页数:7
相关论文
共 21 条