For each of the Nyquist plots of an open-loop transfer functions below: (i) Count the number of encirclements of -1. (ii

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For Each Of The Nyquist Plots Of An Open Loop Transfer Functions Below I Count The Number Of Encirclements Of 1 Ii 1 (129.66 KiB) Viewed 33 times

For each of the Nyquist plots of an open-loop transfer functions below: (i) Count the number of encirclements of -1. (ii) Determine the number of unstable closed-loop poles, (iii) Interpret whether the closed-loop system is stable. For each part, the number of unstable open-loop poles are given. Remember to note the direction of the encirclements. (4 Points Each) Nyquist Diagram Nyquist Diagram 3 5 2 4 swoud -1 -2 5 6 2 8 10 Real Axis Real Axis (a) o Open-Loop Unstable Poles (b) 0 Open-Loop Unstable Poles Nyquist Diagram Nyquist Diagram 2.5 10 2 8 5 1 1 4 05 3 2 0 o O 0 -0.5 -2 -6 -15 -B- -10 -25 25 -2 -1.5 QS 1 -10 -8 -6 -4 2 6 8 10 - 1 -0.5 Real Axis Real Axis (C) O Open-Loop Unstable Poles (d) 1 Open-Loop Unstable Pole Nyquist Diagram Nyquist Diagram 0.25 20 0.2 15 0.15 10 0.1 5 0.05 Imaginary Axis 0 -0.05 -0.1 -10 -0.15 -15 -02 -0.25 -1.4 -0.8 -0.2 0 -0.6 Real Avis 0.2 -20 -10 10 15 20 Real Axis (e) 1 Open-Loop Unstable Poles (f) 2 Open-Loop Unstable P