motivation for control with 2 examples
1 CSTR polymerization
1.1 Diagram first.
1.3 Basic Control Strategies
1.4 Recipie Based Operation
2. Distillation Column
2.2 Basic Theory and what is optimized?
Discuss Constraint issue in general and result of tight process control with respect to constraints.
Draw the basic automation hierarchy layer.
Describe in 1-2 lines each level.
Feed Forward and
Feed Backward controller
1. Draw and explain both with an example.
2. Basic Usage,facts and consequences for feed backward controller.
IDEAL - Time series and laplace form.
REAL - PID
PID with D-part only for the process variable.
Why PID is used so
5 important points.
one solution to multiple problems
based on system response
Effect of control
parameters on step response and PID tuning
KP, TN, TV varied either too large or too small.
PID tuning methods
at least 5
Ziegler and Nichols
Chien, Hrones and Reswick
Time summation Constant
Optimum Absolute Value
Root Locus curves
Usability of PID
from practical prespective
profiles for a binary mixture
Schematc View on
Describe the diagram
steam consumption Y axis
Feed Flow X axis
efficient zone, comfort zone and optimal curve.and doing what produces an efficient column.
Measured variables? Manipulated Variables? Problem from control point of
traditional purity measurements
heuristic rules - 7 in all
1. Mass balance
2. Level control
3. T control
6. Fixed flow rate caution
7. Fluid Dynamics
Control Concept application(no qualitymeasurements). Do it on the printed diagrams.
2. Where exactly should the controller and sensor be placed and for what kind of feed??
3. When there is no profile what should be done?
Distillation Column pressureControl Concepts.Do it on the printed diagrams.