Nyquist stability theorem

[′nī‚kwist stə′bil·əd·ē ‚thir·əm] (control systems) The theorem that the net number of counterclockwise rotations about the origin of the complex plane carried out by the value of an analytic function of a complex variable, as its argument is varied around the Nyquist contour, is equal to the number of poles of the variable in the right half-plane minus the number of zeros in the right half-plane. Also known as Nyquist stability criterion.

单词	nyquist stability theorem
释义	Nyquist stability theorem Nyquist stability theorem [′nī‚kwist stə′bil·əd·ē ‚thir·əm] (control systems) The theorem that the net number of counterclockwise rotations about the origin of the complex plane carried out by the value of an analytic function of a complex variable, as its argument is varied around the Nyquist contour, is equal to the number of poles of the variable in the right half-plane minus the number of zeros in the right half-plane. Also known as Nyquist stability criterion.
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