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c. What is an advantage of feedforward control? d. Why is feedforward control typically used in conjunction with feedback control?

c. What is an advantage of feedforward control? d. Why is feedforward control typically used in conjunction with feedback control?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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C,D

1. Short Answer (30 Points) Briefly answer the following questions or sketch the indicated graph. a. Why do we not use pure derivative control? b. Why does derivative control often act on only the output y(t) and not the error signal e(t)? C. What is an advantage of feedforward control? d. Why is feedforward control typically used in conjunction with feedback control? e. For a first-order system under proportional control only, provide a qualitative sketch of the output response to a unit step disturbance change for three values of K 0< K, < Kz, where K, and K2 are positive values. f. In the sketch below, the level control system manipulates the valve to adjust the flowrate q. If the valve is air-to-close (fail open), should the controller be reverse or direct acting? 8.
Transcribed Image Text:1. Short Answer (30 Points) Briefly answer the following questions or sketch the indicated graph. a. Why do we not use pure derivative control? b. Why does derivative control often act on only the output y(t) and not the error signal e(t)? C. What is an advantage of feedforward control? d. Why is feedforward control typically used in conjunction with feedback control? e. For a first-order system under proportional control only, provide a qualitative sketch of the output response to a unit step disturbance change for three values of K 0< K, < Kz, where K, and K2 are positive values. f. In the sketch below, the level control system manipulates the valve to adjust the flowrate q. If the valve is air-to-close (fail open), should the controller be reverse or direct acting? 8.
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