Teachings

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Professor
ROBERTO BARATTI (Tit.)
Period
Second Semester 
Teaching style
Convenzionale 
Lingua Insegnamento
ITALIANO 



Informazioni aggiuntive

Course Curriculum CFU Length(h)
[70/77]  CHEMICAL ENGINEERING [77/00 - Ord. 2017]  PERCORSO COMUNE 9 90

Objectives

Attending classes, the student will learn:
- Knowledge and understanding
Knowledge and understanding of the design methods of a SISO control system.
- Applying knowledge and understanding
Understanding the problems related to the control design for industrial units.
- Making judgments
Skills in judge the needs to control a real process.
- Learning skills
Ability to independent study and analysis of technical books on the course arguments.

Prerequisites

Knowledge: An adequate knowledge of the fundamental methodological aspects of the basic sciences (calculus, geometry, physics), applied science (thermodynamics, reaction system) and operation units (distillation column and reactors).
Skills: Be able to formulate a process model.

Contents

Course overview: why we need to control a process. Overview of the feedback control and the loop components (3 hours).
Quality index of sensors. Sensors for: temperature, pressure, flowrate and compositions. Pneumatic valves (6 hours).
PID controllers: proportional, integral and derivative actions (6 hours).
Transfer function with overview of the Laplace transform. System identification through process reaction curve (9 hours + 6 hours of practice).
Static and dynamic criteria for the control design. Simple rules to design a PID controller (6 hours + 3 hours of practice).
Close-loop transfer function and stability analysis: Routh-Hurwitz criteria and root locus (6 hours + 3 hours of practice).
Frequency analysis (9 hours + 3 hours of practice).
Bode closed-loop stability criterion (3 hours + 3 hours of practice).
Control design in closed-loop (6 hours + 3 hours of practice).
Other controllers: cascade control, ratio control, split-range, feed-forward and inferential (6 hours + 3 hours of practice).
Feedback controller design for industrial units present in the Sardinian territory: heat exchanger, tank, furnace, reactor and distillation column (6 hours).

Teaching Methods

Lectures will be prevalently held in classrooms, also integrated with online teaching resources, by using specific online platforms managed by the University of Cagliari.

60 hours of class and 30 hours of practice, the student is invited to work with the colleagues for finding the solutions of the assigned problems. The teachers is in the class to give support.

Verification of learning

The final exam consists in an oral or written test (in-presence or remotely using computer aids) where the student should be able to:
- understanding the problems related to the control design for common industrial units;
- know the elements of a feedback control system;
- design a control system for a SISO process.
The student is evaluated according to the following criteria:
- demonstrated knowledge and understanding: 18/30-21/30;
-demonstrated knowledge and understanding and ability of applying knowledge: 23/30-26/30;
- demonstrated knowledge and understanding, ability of applying knowledge and ability to critical assessment: 27/30-30/30.

Texts

Romagnoli & Palazoglu, Introduction to Process Control, CRC, 2011
Stephanopoulos, Chemical Process Control, Prentice Hall, NJ, 1984.
Magnani, Tecnologie dei sistemi di controllo, Mc-Graw-Hill, Mi, 2000

More Information

Course notes are available on Moodle.

Questionnaire and social

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