Nyquist diagram

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Nyquist diagram

[′nī‚kwist ‚dī·ə‚gram]
(control systems)
A plot in the complex plane of the open-loop transfer function as the complex frequency is varied along the Nyquist contour; used to determine stability of a control system.
References in periodicals archive ?
For it, are analized the Nyquist plots and formalism of the imaginary part of the electrical module in the time domain (Williams & Watts, 1970) for study the dynamic processes of dielectric relaxation of the carriers.
It can be seen that the diameter of the semi-circular Nyquist plots and the impedance modulus are increasing steadily as the inhibitor concentration increases.
The Nyquist plots (Figure 5) were fitted to an equivalent circuit model used by Creager et al.
An impedance method measurement was utilized to study the pattern of semicircle Nyquist plots as measured by the capacitor sensor.
The Nyquist plots for steel in 1 M HCl in the absence and presence of different L.
The Nyquist plots only provide information about the difference of zeros and poles of the analyzed function, so it is necessary to have additional conditions to assure the correct analysis of the oscillator.
Comparison of Nyquist plots of phosphated MS substrates under galvanically coupled and uncoupled conditions with varying area ratios (1:1, 1:2, and 1:3) in 3.
The parameters describing the equivalent circuit of these composites can be obtained from Nyquist plots [7].
The Nyquist plots and Equations 1 and 2 must be checked for different values of the characteristic impedance [Z.
EIS is commonly used to evaluate the barrier properties of protective coatings, and the results are commonly presented as Bode and Nyquist plots.
The AC impedance measurements are shown as Nyquist plots and polarization data as Tafel plots.