P9.21 Consider a unity feedback system with the loop transfer function K G(s)G(s) %3D s(s + 1)(s + 4)' (a) For K = 4. Determine the gain margin. (b) the value of K required to pro-vide a gain margin equal to 12 dB, and (c) the value of K to yield a steady-state error of 25% of the magni-tude A for the ramp input r(t) = At, t > 0. Can this gain be utilized and achieve acceptable performance?

P9.21 Consider a unity feedback system with the loop transfer function K G(s)G(s) %3D s(s + 1)(s + 4)' (a) For K = 4. Determine the gain margin. (b) the value of K required to pro-vide a gain margin equal to 12 dB, and (c) the value of K to yield a steady-state error of 25% of the magni-tude A for the ramp input r(t) = At, t > 0. Can this gain be utilized and achieve acceptable performance?

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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