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Instrumentation and Process Control

Objectives

The students are expected to learn theoretical-practical skills in the following topics:

Mathematical Modeling of the Dynamics of Chemical Processes

System Dynamics Theory

Laplace Transform Method

Notion of Transfer Function and its application to chemical processes

Empirical Modeling of Processes

Closed-loop Feedback Control

Dynamic Behavior of Closed-loop Controllers

Stability of Closed-loop Control Systems

Controller Tuning

More Complex Control structures

Instrumentation and understanding of P&IDs

General characterization

Code

7342

Credits

6.0

Responsible teacher

José Paulo Barbosa Mota

Hours

Weekly - 4

Total - Available soon

Teaching language

Português

Prerequisites

Available soon

Bibliography

Available soon

Teaching method

Available soon

Evaluation method

Available soon

Subject matter

  • Process Control
  1. Incentives and economic justification for the automatic control of chemical processes
  2. Components of a control system: Process, Meters, Transmitters and Transducers, Controller, Final control element
  3. Mathematical modelling of chemical processes
    1. Classical modeling and linearization of nonlinear models
    2. Empirical modelling and parametric estimation
    3. Degrees of freedom of a process
  4. Laplace Transforms
    1. Transfer function of a system
    2. Block diagram
  5. Characterization of linear dynamic systems
    1. First-order systems
    2. Second-order systems
    3. Higher-order systems
  6. Feeddback Control
    1. ON/OFF controller
    2. Proportional controller (P)
    3. Proportional-Integral (PI) Controller
    4. Proportional-Integral-Derivative Controller (PID)
  7. Dynamic behavior of feedback-controlled processes
    1. Block diagram
    2. Closed-loop control response
    3. Servo-mechanism problem
    4. Regulation problem
    5. Proportionar, integral and differential control actions
    6. Controlled system response to a step change in reference value
    7. Controlled system response to a step change in load value
    8. Effect of combined PI and PID control actions
  8. Cascade control
  9. Feedforward control
  10. Feedfprward, closed-loop control
  11. Time-delayed processes
  12. Reverse-Response Processes
  13. Practical rules for choosing and implementing controllers
    1. Effect of controller parameters (gain and time constants) on the response of the controlled system
    2. tunning of controller parameters: Practical rules, Ziegler-Nichols Method, Cohen & Coon Method
  14. Digital control
    1. Digital signal transmission
    2. A/D and D/A converters
    3. Analog and digital filters
    4. Digital version of the PID controller
  • Instrumentation
  1. Control valves
    1. Constituent elements
    2. Types of shutters
    3. Dynamic behavior
    4. Sizing
  2. Temperature meters
    1. Thermocouples
    2. Resistance thermometers
  3. Pressure gauges
    1. Liquid column elements
    2. Elastic elements
    3. Electric pressure transducers
  4. Flow meters
    1. Flow rate meters
    2. Differential pressure meters: Orifice plate, Venturi and Nozzle Tube, Pitot Tube
    3. Variable area meters: Diameter, Hole and Tapered Plug, Piston meter
    4. Mass flow meters
  5. Level gauges

Programs

Programs where the course is taught: