Consider the feedback control system block diagram in Fig. 2. Determine the values of K for which K the closed-loop system is marginally stable if Gc(s) and G(s) 1+0.5s Remember 0.25s2+0.5s+1" p(s) that close-loop transfer function has the form T(s) %3D q(s)

Consider the feedback control system block diagram in Fig. 2. Determine the values of K for which K the closed-loop system is marginally stable if Gc(s) and G(s) 1+0.5s Remember 0.25s2+0.5s+1" p(s) that close-loop transfer function has the form T(s) %3D q(s)

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 12.3P

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Question

4. Consider the feedback control system block diagram in Fig. 2. Determine the values of K for which
K
the closed-loop system is marginally stable if Gc (s):
and G(s) =
1+0.5s
Remember
0.25s2+0.5s+1
p(s)
that close-loop transfer function has the form T(s)
%3D
q(s)
Controller
Process
R(s)
Y(s)
Gc(s)
G(s)
Figure 2. Block diagram to solve question 4

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