Control Systems

Scholar Year: 2019/2020 - 2S

Courses

Head Teacher Responsability João Miguel Guerreiro Dias Alves Lourenço Head

Weekly workload Hours/week T TP P PL L TC THE EL OT OT/PL TPL S Type of classes 4 2 Lectures Type Teacher Classes Hours Theorethical and Practical classes Totals 1 4,00 João Lourenço   4,00 Prática Laboratorial Totals 1 2,00 Mário Alves   6,00

Teaching language

Portuguese

Intended learning outcomes (Knowledges, skills and competencies to be developed by the students)

1-Students should be able to understand the concept of stability of control system and methods of stability
analysis.
2-Students should be able to apply the root locus and the frequency response methods to analyze and design
linear feedback systems.
3-Students understand basic applications of proportional, integral and derivative feedbacks in control systems
and their effects on the system performance and stability.
4-Students should be able to do the tuning of a PID controller using the tuning methods learned in the classroom.
5-Students should be able to analyze and design control systems using Matlab/Simulink.
software.

Syllabus

1-Scope of control. Open and closed loop systems. Advantages of closed loop operation: Sensitivity and
complementary sensitivity, disturbance and noise reduction
2–Root-Locus Analysis-Root locus plot, rules for constructing root loci, root-locus analysis of control systems
and stability.
3-Frequency Response Analysis-Bode diagrams. Relative stability, Gain margin, phase margin, correlation
between time and frequency response.
4-Compensator design- Performance criteria. Lag, lead and lag-lead networks Compensator design using bode
plots and Root-Locus.
5–PID Controllers-Proportional, Integral and Differential Elements. Effects on system response. The Ziegler-
Nichols, Chien-Hrones-Reswick and Cohen-Coon and SIMC PID tuning rules. Reset-windup. Relay feedback PID
auto-tuning

Software

Matlab e Simulink

Keywords

Technological sciences > Engineering > Systems engineering > Systems theory

Technological sciences > Engineering > Control engineering > Automation

Demonstration of the syllabus coherence with the UC intended learning outcomes

The course contents are consistent with the objectives of the course because:
- Sections Scope of control, Root-Locus Analysis and Frequency Response Analysis of the syllabus allow
students to understand the concept of stability of control system and methods of stability analysis;
- Sections Root-Locus analysis, frequency response analysis and compensator design of the syllabus provide
students with the necessary knowledge to analyze and design linear feedback systems;
- The PID controllers section, of the syllabus, allows the students to understand the PID effects on a system
performance and stability and also to tune this kind of controllers.
- In all the syllabus sections the Matlab software is used and taught, in a way that the students should be able to
apply it in the control systems analysis and design

Teaching methodologies

The theoretical contents of the curricular unit will be presented through lectures. Students are encouraged to
apply the competences acquired through problem solving sessions.
Laboratory activities are used to relate the concepts to practical applications and students are
exposed to hand-on experience, proper use of equipment and also to provide the students with experience on
the use of simulation tools for the computer-aided analysis and controller design of typical dynamic systems. It
also trains students in the analysis and presentation of experimental data and improve the students report
writing skills

Demonstration of the teaching methodologies coherence with the curricular unit's intended learning outcomes

The syllabus of the curricular unit will be operated mainly by an expository methodology (theoretical-practical
classes) supported by the completion of practical activities (laboratory classes) that allow to obtain skills about
the basic concepts of Control Systems. In the laboratory classes is essential to use simulation tools for the
computer-aided analysis and controller design of typical dynamic systems as well as work with actual
equipments in order to achieve the curricular unit's objectives.
The student assessment was designed to measure the extent to which competences were developed.

Assessment methodologies and evidences

Final grades for the course will be based on the following assessment of a student’s work:
Laboratory activities and reports and Lab quizzes (7 labs) 25% of final grade
Final Exam 75% of final grade.

Primary Bibliography