Nyquist Stability Criterion is a graphical method used in control-system analysis to determine the closed-loop stability of a feedback system by examining how the frequency response of the open-loop transfer function G(s)H(s)G(s)H(s) encircles the critical point (−1, 0)(-1,\,0) in the complex plane.It is based on the Nyquist plot and relates the number of encirclements of the […]