Numerical estimation of Fricke-Morse impedance model parameters using single-frequency sinusoidal excitation
Numerical estimation of Fricke-Morse impedance model parameters using single-frequency sinusoidal excitation
复制标题
使用单频正弦激励对 Fricke-Morse 阻抗模型参数进行数值估计
DOI：
10.1088/1361-6579/ab3666
复制
发表时间：
2019
影响因子：
3.2
通讯作者：
Zhaosheng Teng
中科院分区：
文献类型：
--
作者：
Fu Zhang;Benjamin Sanchez;Seward B Rutkove;Yuxiang Yang;Haowen Zhong;Jianmin Li;Zhaosheng Teng
生物电阻抗分析（BIA）中广泛使用的是生物电阻抗模型，通常采用多频电阻抗数据拟合。本文提出了一种新的单频正弦激励下模型参数估计的数值方法，方法采用单频正弦信号作为电流激励，记录初始瞬态、稳态和瞬态电压响应随电流激励的变化沿着。模型参数，然后可以估计与数值计算从所获得的signal.Main resultsSimulation和实验测量验证2 R1 C电路，通过使用50 kHz的正弦电流激励。结果表明，在2%噪声下，模型参数的最大相对误差小于1%，在实验测量中，模型参数的最大相对误差小于2%。
ObjectiveThe Fricke–Morse impedance model is widely used in bioelectrical impedance analysis (BIA), which is usually fitted by multi-frequency electrical impedance data. Here, we propose a novel numerical method for estimating the model parameters using single-frequency sinusoidal excitation.ApproachA single-frequency sinusoidal signal is used as the current excitation, from which the initial transient, the steady-state and the ending transient voltage responses along with the current excitation are recorded. The model parameters can be then estimated with numerical calculations from the acquired signals.Main resultsSimulation and experimental measurements are verified on a 2R1C circuit by using a 50 kHz sinusoidal current excitation. The results show that the maximum relative errors of the estimated model parameters are< 1% in simulation with 2% noise and< 2% in experimental measurement.SignificanceThe proposed method could extend the applications of wideband BIA by using single-frequency excitation, rather than multi-frequency excitation as is done today.