Nyquist contour
Nyquist contour
[′nī‚kwist ‚kän‚tu̇r] (control systems)
A directed closed path in the complex frequency plane used in constructing a Nyquist diagram, which runs upward, parallel to the whole length of the imaginary axis at an infinitesimal distance to the right of it, and returns from + j ∞ to -j ∞ along a semicircle of infinite radius in the right half-plane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
The intuitive criterion can be used when the
Nyquist contour is simple, which means that it satisfies three conditions: It turns clockwise with [Omega], it begins and ends at the origin (a band-pass filter has this property) and it crosses the real axis only once for positive [Omega].
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