Nyquist Stability Criteria



It is a graphical technique for determining the stability of linear time-invariant system


For stability, all the roots of the characteristic equation 1+GH(s) = 0 must lie in the left-half plane.

Note that open loop transfer function of a stable system may have poles in the left half plane

Nyquist stability criteria relates the open-loop transfer functions and the poles of the characteristic function.


Uploaded Sun, 17-Jan-2021
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