Consider the closed-loop system shown below: The loop has two proportional controllers. Kej and Ke2 (a) For what range of the controller gain Kei is the inner loop stable? (Hint: Use the characteristic equation only for the inner loop only and check the Routh's criteria for stability). (b) Let the controller gain Kej be 0.2. Calculate the closed-loop transfer function from D to Y. Assuming R= 0. (c) Calculate the range of the controller gain K2, that makes the overall closed loop system (Y/D) stable. Use Routh's test again. Y R+ 2 K2 (s – 1) (5s + 1)(8s + 1) 10 16

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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Consider the closed-loop system shown below: The loop has two
proportional controllers. Kej and Ke2
(a) For what range of the controller gain Kei is the inner loop
stable? (Hint: Use the characteristic equation only for the inner loop
only and check the Routh's criteria for stability).
(b) Let the controller gain Kej be 0.2. Calculate the closed-loop
transfer function from D to Y. Assuming R= 0.
(c) Calculate the range of the controller gain K2, that makes the
overall closed loop system (Y/D) stable. Use Routh's test again.
Y
R+
2
K2
(s – 1)
(5s + 1)(8s + 1)
10
16
Transcribed Image Text:Consider the closed-loop system shown below: The loop has two proportional controllers. Kej and Ke2 (a) For what range of the controller gain Kei is the inner loop stable? (Hint: Use the characteristic equation only for the inner loop only and check the Routh's criteria for stability). (b) Let the controller gain Kej be 0.2. Calculate the closed-loop transfer function from D to Y. Assuming R= 0. (c) Calculate the range of the controller gain K2, that makes the overall closed loop system (Y/D) stable. Use Routh's test again. Y R+ 2 K2 (s – 1) (5s + 1)(8s + 1) 10 16
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