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.
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The Nyquist plot was observed to evaluate the pattern to the conditions of reinforced concrete sample under wet and dry condition.
d1]) were determined from Nyquist plot by fitting the data using Boukamp software.
Moreover, the potential problems with proper frequency gridding can be overcome using Nyquist plot based approach from (Soylemez et al.
From the Nyquist plot, the impedance can be represented as a vector of length [absolute value of Z].
Each time constant from the equivalent circuit appears as either a semicircle in a Nyquist plot or a peak in the phase angle in a Bode plot.
In fact, the Nyquist plot has great similarity with the well known Cole-Cole plot used to define dielectric characteristics of materials.
The degradation steps are described below and shown in Figure 3 with (1) an example of the appropriate equivalent circuit with typical values for the electrical elements, (2) a Bode plot, and (3) a Nyquist plot.
Display processed data as Amplitude, Phase or Nyquist plot
A Nyquist plot provides information on the diffusion process occurring in the coating system.
The existence of a single semicircle in Nyquist plot shows that there was only single charge transfer process during the anodic dissolution of MS and remained unaffected in the presence of N-Benzylimidazole added in the acid.
Furthermore, this technique can be embellished with the Nyquist plot based approach from (Soylemez et al.
When the impedance is measured at a number of frequencies and is plotted on the Cartesian axes, the resulting plot is called a Nyquist plot.