Excercise 4: Stability The Nyquist plot for some control system resembles the one shown in figure (a) below. A zoom of this plot, showing all important details around the critical point, is shown in figure (b). Assume that the open loop system is stable. 0.6 1000 (a) (b) 0.4 500 0.2 -0.2 -500 -0.4 -0.6 -1000 -100 -6 -4 Re L(iw) -2 -20 -80 -60 -40 Re L(iw) (a) Is the closed-loop system stable or unstable? (b) large value? What happens to the stability of the system as the gain goes from a very small to a very Im L(iw) Im L(iw) O
Excercise 4: Stability The Nyquist plot for some control system resembles the one shown in figure (a) below. A zoom of this plot, showing all important details around the critical point, is shown in figure (b). Assume that the open loop system is stable. 0.6 1000 (a) (b) 0.4 500 0.2 -0.2 -500 -0.4 -0.6 -1000 -100 -6 -4 Re L(iw) -2 -20 -80 -60 -40 Re L(iw) (a) Is the closed-loop system stable or unstable? (b) large value? What happens to the stability of the system as the gain goes from a very small to a very Im L(iw) Im L(iw) O
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.1P
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