1. Workshop for Flipped Class
Based on students having completed the Chapter 7 e-Lesson before class
Chapter 7
The Feedback Loop
Copyright © Thomas Marlin 2016

2. A Workshop from Chapter 7
flue gas
Find at least one variable that could be handled by each of the five approaches;:
no control,
manual,
on/off,
continuous, and
emergency.
feed
product
burner LI 15 AT 7 TI 15
air
fuel oil
steam

3. CHAPTER 7: THE FEEDBACK LOOP
WORKSHOP 10
Complete the following table for the four control system dynamic responses on the following slides. Which is the best performance?
Performance Measurement
Value or comment for dynamic response
Case A B C D
Steady-state Offset CV units
IAE CV units
Decay Ratio Dimensionless
Rise time Time units
Settling time Time units
MV Overshoot % of s-s change in MV
Max. CV deviation CV units
CV variance (CV units)2
MV High frequency variability
% of s-s Change

4. SP = set point
CV = controlled variable
MV = manipulated variable

6. CHAPTER 7: THE FEEDBACK LOOP
WORKSHOP 10A
Case A

7. CHAPTER 7: THE FEEDBACK LOOP
WORKSHOP 10B
Case B

8. CHAPTER 7: THE FEEDBACK LOOP
WORKSHOP 10C
Case C

9. CHAPTER 7: THE FEEDBACK LOOP
WORKSHOP 10D
Case D

10. CHAPTER 7: THE FEEDBACK LOOP
WORKSHOP 7 v2
Recommend the correct failure position (open or closed) for each of the circled final elements.
feed v1
product v4
burner
fuel
air v3