homework5

homework5 - CHBE 470 – Process Dynamics and Control –...

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CHBE 470 – Process Dynamics and Control – Fall 2007 Homework Set 5 Assigned: Wednesday, October 17 Due: Wednesday, October 24 Note: Please staple your papers and include your name in the first page Problem 1: Consider the general closed-loop block diagram with c G (s) 1.6 = , p 5 G( s ) (s 1)(2s 1) = ++ , fm G (s) G (s) 1 == . Suppose that the system is subject to a set point change in the input of magnitude 0.1. Determine: a) The maximum value of the response b) The offset c) The period of the oscillation Problem 2: Consult chapter 11 of the book for details on interacting 2 nd order systems. Consider the liquid-level system of two noninteracting tanks with a proportional control and linear resistances. It was found that when the steady-state inlet flow rate q (ft 3 /min) is plotted against the steady-state liquid level in both tanks (h in ft), the slope of the line is 2 ft 2 /min. Both tanks have the same cross sectional areas of 2 ft 2 . The control valve was
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homework5 - CHBE 470 – Process Dynamics and Control –...

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