Question: A closed-loop system is used in a high-speed steel rolling mill to control the accuracy of the steel strip thickness. The transfer function for the

A closed-loop system is used in a high-speed steel rolling mill to control the accuracy of the steel strip thickness. The transfer function for the process shown in Figure E4.13 can be represented as
G(s) = 1 / s(s + 20)
Calculate the sensitivity of the closed-loop transfer function to changes in the controller gain K.
Figure E4.13
Control system for a steel rolling mill.
(a) Signal flow graph.
(b) Block diagram.

TAS G(s) Ris) Desired thickness Actual thickness TAs) Controller Process Gs) Desined thickness Actual thickness

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