Determine if the following processes can be made unstable by increasing the gain of a proportional controller

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Determine if the following processes can be made unstable by increasing the gain of a proportional controller Kcto a sufficiently large value using frequency response arguments:

a.

G,G,Gm 2 s +1 I|

b.

3 G,G,G, (s + 1)(2s + 1) т

c.

d.

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Process Dynamics And Control

ISBN: 1602

4th Edition

Authors: Dale E. Seborg, Thomas F. Edgar, Duncan A. Mellichamp, Francis J. Doyle

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