- Docente: Ferruccio Doghieri
- Credits: 9
- SSD: ING-IND/24
- Language: Italian
- Moduli: Ferruccio Doghieri (Modulo 1) Alessandro Paglianti (Modulo 2)
- Teaching Mode: Traditional lectures (Modulo 1) Traditional lectures (Modulo 2)
- Campus: Bologna
- Corso: Second cycle degree programme (LM) in Chemical and Process Engineering (cod. 8896)
Learning outcomes
The course provides the basic elements to understand the dynamics of chemical processes and to analyze and design SISO and MIMO control systems
Course contents
Motivations and introduction. Classification of process
variables.
DYNAMICS OF CHEMICAL PROCESSES
Mathematical models for the process dynamics. Laplace transforms
and solutions of differential equations and systems. Linearizations
of equation and systems. Transfer functions.
Dynamic classification of chemical processes. 1st order systems:
gain and time constant.
2nd order systems: overshoot, decay ratio. Multicapacitive
systems.
FEEDBACK CONTROL
Feedback control block diagram. Proportional, integral and
derivative control. Effect of control actions on the dynamics of
chemical processes.
Stability of systems with feedback control. Characetristic
equation and Routh Hurwitz criterion. Root locus.
Tuning criteria: simple and integral criteria; Cohen-Coon
method.
Frequency response analysis: Bode diagrams for different systems.
Bode stability criterion. Phase and gain margin, "open loop"
transfer function. Ziegler Nichols tuning method. Nyqvist
plots.
Cascade control, selective control and split range control.
Control of MIMO systems.
FEEDFORWARD CONTROL
Block diagram- Feedback-feedforward control. Control of systems
with large dead time or inverse response: Smith predictors.
Examples and exercises.
Readings/Bibliography
George Stephanopoulos :"Chemical process control: an introduction
to theory and practice" Prentice-Hall, 1984
Pao C. Chau" Process Control : A First Course with MATLAB"
Cambridge Series in Chemical Engineering, 2002.
B. A. Ogunnaike, W. H. Ray, Process Dynamics, Modeling, and
Control, Oxford, 1994.
Teaching methods
Regular classes
Assessment methods
Final oral exam
Office hours
See the website of Ferruccio Doghieri
See the website of Alessandro Paglianti