Dynamic Behavior 14
0f Feedback-Controlled
Processes
In Chapter 13 we defined the basic notion of a feedback control
system and we discussed its hardware components. In this chapter we
examine the dynamic behavior of a process that is controlled by a
feed

Modelling and
Analysis for
Process Control
4.1 ra INTRODUCTION
In the previous chapter, solutions to fundamental dynamic models were developed
using analytical and numerical methods. The analytical integrating factor method
was limited to sets of first-or

Dynamic
Behavior of
Typical Process
Systems
5.1 n INTRODUCTION
Examples in the previous two chapters have demonstrated that physical systems,
which involve very different physical principles, can have similar dynamic behav
ior. The concept that a single m

The PID
Algorithm
8.1 m INTRODUCTION
Continuous feedback control offers the potential for improved plant operation by
maintaining selected variables close to their desired values. In this chapter we
will emphasize the control algorithm, while remembering

Mathematical
Modelling
Principles
3.1 El INTRODUCTION
The models addressed in this chapter are based on fundamental theories or laws,
such as the conservations of mass, energy, and momentum. Of many approaches to
understanding physical systems, engineers

The Feedback
Loop
7.1 n INTRODUCTION
Now that we are prepared with a good understanding of process dynamics, we
can begin to address the technology for automatic process control. The goals of
process controlsafety, environmental protection, equipment prot

Symbols and
Acronyms
Process control uses many symbols in equations and drawings. The equation sym
bols are presented here, and the drawing symbols are presented along with common
process sketches in Appendix A. The symbols selected for this Table are use

Chapter 10
PID Control
Based on a survey of over eleven thousand controllers in the refining, chemicals and pulp and paper industries, 97% of regulatory controllers utilize PID
feedback.
Desborough Honeywell, 2000, see [DM02].
PID control is by far the mo

Feedback Control Systems
Feedback Control Systems
K. Craig
1
Feedback Control Topics
Part 1
Control System Types
Open-Loop Control: Basic & Feedforward
Closed-Loop Control
Block Diagrams and Loading Effects
Generalized Feedback Control Block Diagram
F

10.DynamicBehaviorof
ClosedLoopControlSystems
Feedback control loop( or closed-loop system) ; the combination
of the process, the feedback controller, and the instruments.
10.1 Block Diagram Representation
Figure 10.1. Temperature control system or stirr