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Two engineers are analyzing step-test data from a

Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg ISBN: 9780470128671 148

Solution for problem 14.34 Chapter 14

Process Dynamics and Control | 3rd Edition

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Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg

Process Dynamics and Control | 3rd Edition

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Problem 14.34

Two engineers are analyzing step-test data from a bioreactor. Engineer A says that the data indicate a secondorder overdamped process, with time constants of 2 and 6 min but no time delay. Engineer B insists that the best fit is a FOPTD model, with T = 7 min and e = 1 min. Both engineers claim a proportional controller can be set at a large value for Kc to control the process and that stability is no problem. Based on their models, who is right, who is wrong, and why? Use a frequency-response argument.

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Thomas Nelson PERFECT DUTIES: IMPERFECT DUTIES: PROSCRIBED (­) PRESCRIBED (+) IT IS OUR DUTY NOT TO DO THEIT IS OUR DUTY TO DO THEM (TO (TO PERFORM IS CULPABLE OR PERFORM IS MERITORIOUS OR BLAMEWORTHY) PRAISEWORTHY) TO SELF Not to commit suicide Develop talents TO OTHERS Not to lie or murder Beneficence – To do good to/for others SELL KIDNEYS UTILITARIANISM Win­Win for person who gets kidney and whoever got to use the money (Ex: Father selling kidneys to pay for children’s college tuitions) LIBERTARIANISM Yes because of self­ownership (as long as it doesn’t harm anyone else) LOCKE No because we do not own ourselves absolutely (God does) Maybe selling one is okay because God could have intended it that way KANT No because one be using oneself as a mere means (treating oneself as a thing for a profit)

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Chapter 14, Problem 14.34 is Solved
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Textbook: Process Dynamics and Control
Edition: 3
Author: Dale E. Seborg
ISBN: 9780470128671

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Two engineers are analyzing step-test data from a