Control Structures Part 1

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Author:
bhanughanu
ID:
226211
Filename:
Control Structures Part 1
Updated:
2013-07-07 15:31:03
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PPO
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Description:
CS part 1 revision
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  1. Describe the
    motivation for control with 2 examples
    • 1 CSTR polymerization
    •  1.1 Diagram first.
    •  1.2 Chemistry
    •  1.3 Basic Control Strategies
    •  1.4 Recipie Based Operation
    • 2. Distillation Column
    •  2.1 Diagram
    •  2.2 Basic Theory and what is optimized?
  2. Strategy for
    process control
    Discuss Constraint issue in general and result of tight process control with respect to constraints.
  3. Automation
    Hierarchy Layer
    • Draw the basic automation hierarchy layer.
    • Describe in 1-2 lines each level.
  4. Feed Forward and
    Feed Backward controller
    • 1. Draw and explain both with an example.
    • 2. Basic Usage,facts and consequences for feed backward controller.
  5. PID
    Controller(math,laplace,real PID)
    • IDEAL - Time series and laplace form.
    • REAL - PID
    • PID with D-part only for the process variable.
  6. Why PID is used so
    much?
    • 5 important points.
    • simplicity
    • tuning
    • one solution to multiple problems
    • linearity issues
    • based on system response
  7. Effect of control
    parameters on step response and PID tuning
    KP, TN, TV varied either too large or too small.
  8. PID tuning methods
    at least 5
    • Ziegler and Nichols
    • Chien, Hrones and Reswick
    • Time summation Constant
    • Optimum Absolute Value
    • Bode Diagram
    • Root Locus curves
  9. Usability of PID
    from practical prespective
    6 points
  10. 4 Distillation
    profiles for a binary mixture
  11. Schematc View on
    column operation.
    • 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.
  12. Column Control.
    Measured variables? Manipulated Variables? Problem from control point of
    view.
  13. Problems with
    traditional purity measurements
  14. Purity Measurements
  15. Distillaation
    heuristic rules - 7 in all
    • 1. Mass balance
    • 2. Level control
    • 3. T control
    • 4. Dynamics
    • 5. Decoupling
    • 6. Fixed flow rate caution
    • 7. Fluid Dynamics
  16. 1.Distillation Column
    Control Concept application(no quality measurements). 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?
  17. Distillation Column
    pressure Control Concepts.Do it on the printed diagrams.

    explain also the strategy and alternatives.

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