Numerical extraction of Cole-Cole impedance parameters from step response

被引：17

作者：

Freeborn, Todd J. ^{[1
]}

Maundy, Brent ^{[1
]}

Elwakil, Ahmed ^{[2
]}

机构：

[1] Univ Calgary, Dept Elect & Comp Engn, 2500 Univ Dr NW, Calgary, AB, Canada

[2] Univ Sharjah, Dept Elect & Comp Engn, Emirates, U Arab Emirates

来源：

IEICE NONLINEAR THEORY AND ITS APPLICATIONS | 2011年 / 2卷 / 04期

关键词：

bioimpedance; Cole-Cole model; fractional-order circuits; fractional calculus;

D O I：

10.1587/nolta.2.548

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

In this paper we propose a numerical method to extract the four parameters (R-0, R-infinity, C, and alpha) that characterize a single-dispersion Cole-Cole impedance model from its step response, based on modelling the step response using fractional calculus, without requiring direct measurement of the real and imaginary impedance parts. MATLAB simulations using Cole-Cole impedances of fruit tissues with alpha < 1, PSPICE simulations and experimental results using a Cole-Cole model with alpha = 1 are given to verify the method. Extracted impedance parameters show less than 0.1% relative error in simulation and less than 10% error in experimental results for the extracted impedance parameters.

引用

页码：548 / 561

页数：14

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