| | |
Summary: Control Systems Design, SC4026
SC4026 Fall 2009, dr. A. Abate, DCSC, TU Delft
Lecture 1
· The concept of feedback
· The role of a controller
· What is a "state"?
· The concept of "model" in systems engineering: a few examples
SC4026 Fall 2009, dr. A. Abate, DCSC, TU Delft 1
The concept of feedback
reasoning about a feedback system is difficult because the first system influences
the second and the second system influences the first, leading to a circular argument.
This makes reasoning based on cause and effect tricky, and it is necessary to analyze
thesystemasawhole.Aconsequenceofthisisthatthebehavioroffeedbacksystems
is often counterintuitive, and it is therefore necessary to resort to formal methods
to understand them.
Figure 1.1 illustrates in block diagram form the idea of feedback. We often use
u
System 2System 1
y
(a) Closed loop
|
