- Docente: Gianni Bertoni
- Credits: 9
- SSD: ING-INF/04
- Language: Italian
- Moduli: Gianni Bertoni (Modulo 2) Gianni Bertoni (Modulo 1)
- Teaching Mode: Traditional lectures (Modulo 2) Traditional lectures (Modulo 1)
- Campus: Forli
- Corso: First cycle degree programme (L) in Aerospace Engineering (cod. 0207)
Learning outcomes
The course intends to discuss the fundamental principles of functioning of open-loop automatic control systems and feedback automatic control systems.
Elementary techniques will be introduced, as to:
-analysis of the characteristics of the SISO stationary linear dynamic systems
-synthesis of feedback control systems with examples referring to the control of an aircraft's attitude and route.
-methods of utilization of the main components (actuators and sensors) in control loops.
Course contents
1 General concepts:
- Historical notes. What automation is
- Concepts of material manipulation and symbolic manipulation
- Automatic control systems: open loop control and feedback control
- Examples of automatic control systems: position, velocity, level and temperature regulators.
2 Mathematical Models:
- The identification problem
- Parametric and non parametric identification techniques
- Differential equations (and equation systems); transformers and anti-transformers
- Transfer function and impulsive response function
- Mathematical models of linear and stationary systems of input-output and of input-state-output type.
3 Analysis in the time domain:
- Stability: Lyapunov and Routh criteria
- Controllability and observability
- Techniques of reduction of the order of the model
- Steady state errors
- Insensitiveness to disturbances and parameter variations.
- Parameters of the response to a step input
4 Synthesis in the time domain:
- State observers: identity observer and reduced order observer
- Pole assignment
- Root locus; examples
- Standard regulators: analytic synthesis, Ziegler and Nicols techniques
5 Harmonic response function:
- Definition; link with impulsive response function
Representations: polar diagrams and Bode diagrams; examples.
6 Harmonic analysis:
- The Nyquist stability criterion for the stability of feedback systems
- The width margins and the phase margins for the analysis of dynamic behaviour
- M and N constant loci, resonance peak and band width.
7 Control systems components:
- collector motors: series and independent excitation
- brushless and step motors
- Transducer devices:
Position and velocity transducers
Flow and velocity transducers
Temperature transducers.
8 Example of synthesis of an aircraft's autopilot:
- Reference systems
- Mathematical model of an aircraft
- Autopilot for latero-directional dynamics
- Autopilot for longitudinal dynamics.
Readings/Bibliography
1) G. Bertoni, M.E. Penati, S. Simonini: I
componenti dell'automazione. Esculapio, Bologna, 2001
2) M.E. Penati, G. Bertoni: Automazione e sistemi
di controllo – Vol.I, II. Esculapio, Bologna,
2000
3) M.E: Controlli automatici. Esercizi e test
commentati e risolti. Esculapio, Bologna, 2000
Teaching methods
Classroom lessons with individuation of the fundamental subjects of the course.
Practice sessions during the discussion of the relative theoretical subjects.
Assessment methods
Oral exam.
The exam consists of a series of oral questions aimed at verifying the student's understanding of the material presented during lessons and an exercise similar to the exercises presented during lessons.
Teaching tools
Overhead projector and PC
Office hours
See the website of Gianni Bertoni