P9 27 Consider the system shown in Figure P9 27 Determine the maximum value of K K max for which the closed loop system is stable Plot the phase margin as a function of the gain 1 K K max Explain what happens to the phase margin as K approaches K max FIGURE P9 27 Nonunity feedback system with proportional controller K Controller R(s) K Process 4 Y(s) 2s 4 Sensor s 1

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P9 27 Consider the system shown in Figure P9 27  Determine the maximum value of K K   max for which the closed loop system is stable  Plot the phase margin as a function of the gain 1     K K max Explain what happens to the phase margin as K approaches K max  FIGURE P9 27 Nonunity feedback system with proportional controller K  Controller R(s) K Process 4 Y(s)  2s 4 Sensor s 1

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Question: P9.27 Consider the system shown in Figure P9.27. Determine the maximum value of K K = max for which the closed-loop system is stable. Plot

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