Nyquist diagram

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 ?
8(b), after 120 days of immersion, the second loop appeared in the Nyquist diagram of NR coating which means the corrosion reactions.
5P coatings, the Nyquist diagrams after selected times of immersion in 3.
With attention to the Nyquist diagrams and equivalent circuits and data extracted from EIS software, Table 3 shows [R.
In a Nyquist diagram, Im(Z) is plotted against Re(Z), and frequency is contained implicitly.
Because impedance is a complex number with real component, Re(Z), and imaginary component, Im(Z), EIS spectra are generally plotted in either Bode or Nyquist diagrams.
through the Nyquist diagram has not led to the selection of any variant and that to be proceeded to extend the grade and we have obtained a series of values for the coefficients.
The Nyquist diagram of an immersed sample at five points of time namely, at the beginning of the experiment, after 26 days, 69 days, 98 days, and after 117 days is presented in Fig.
The Nyquist diagrams of high solid polyurethane coating with two dry film thicknesses of 250 and 1000 [micro]m at 20[degrees]C are shown in Figs.
The Nyquist diagrams of high solid polyurethane coating with two dry thicknesses of 1000 and 250 [micro]m at 50[degrees]C are shown in Figs.
All the remain Nyquist diagrams show approximately a semicircle indicating that the charge transfer process control the alloy corrosion and the rise temperature does not change the mechanism of the amorphous alloy dissolution.
The diffusion tail is also observed at Nyquist diagrams in presence of inhibitor MEBndthioSCAzn and BrBndthioSCAzn in the range (40-60[degrees]C) where the [b.