control system course

LINEAR SYSTEMS & CONTROL

Textbook


K. Ogata (2002), 4thEdition.

Modern Control Engineering,

Roland S. Burns, 1stedition

Advanced Control Engineering
 
References


•

N. S. Nise (2000).

Control Systems Engineering.

•

R. C. Dorf, R. H. Bishop (2000).

Modern Control Systems.
 
Course content


1.Course introduction. Closed and open loop control systems.
2. Mathematical modeling of dynamic systems. Transfer function. Impulse response. Signal-flow graphs. Proportional, integral and derivative control (PID).
3. Electronic controllers. Inverting/noninverting amplifier. Lead and lag.
4. Transient and steady-state response analysis. First and second-order systems.
5. Stability analysis in the complex plane. Routh's stability.

6.Root-locus analysis. Negative and positive feedback.
7. Control system design by the root-locus method. Lead, lag and lag-lead compensation.
8. Bode diagrams, Nyquist plots.
9. Nyquist stability criterion. Stability analysis.
10. Step transient response vs. frequency response.
11. Control system design by frequency response. Compensation techniques

Control System Definition


• A control system consists of subsystems and processes (or plants) assembled for the purpose of controlling the outputs of the processes.

open-loop system

open-loop system



Disadvantages:
Disturbances cause errors.
Changes in calibration cause errors.
Output may differ from what is desired.

Advantages:
Simple construction.
Ease of maintenance.
Less expensive.
No stability problem.
No need for output measurement.

Closed-loop (feedback) system

Closed-loop (feedback) system


Disadvantages:
More complex
More expensive
Possibility of instability
Need for output Measurement

Advantages:

High accuracy.
Not sensitive on disturbance.
Controllable transient response
Controllable steady state error.

Simple feedback system Room Temperature

see you soon in the next lecture.