Engineering - Process Systems Analysis and Control

zqitianyi

Since the first edition of this book was published in 1965, many changes have
taken place in process control. Nearly all undergraduate students in chemical
engineering are now required to take a course‘in process dynamics and control.
The purpose of this book is to take the student from the basic mathematics to a
variety of design applications in a clear, concise manner.
The most significant change since the first edition is the use of the digital
computer in complex problem-solving and in process control instrumentation.
However, the fundamentals of process control, which remain the same, must be
acquired before one can appreciate the advanced topics of control.
In its present form, this book represents a major revision of the first edition.
The material for this book evolved from courses taught at Purdue University and
Drexel University. The first 17 chapters on fundamentals are quite close to the
first 20 chapters of the first .edition. The remaining 18 chapters contain many
new topics, which were considered very advanced when the first edition was
published.
A knowledge of calculus, unit operations, and complex numbers is presumed
on the part of the student. In certain later chapters, more advanced mathematical
preparation is useful. Some examples would include partial differential equations
in Chap. 21, linear algebra in Chaps. 28-30, and Fourier series in Chap. 33.
Analog computation and pneumatic controllers in the first edition have been
replaced by digital computation and microprocessor-based controllers in Chaps.
34 and 35. The student should be assigned material from these chapters at the
appropriate time in the development of the fundamentals. For example, obtaining
the transient response for a system containing a transport lag can be obtained easily
only with the use of computer simulation of transport lag. Some of the software
now available for solving control problems should be available to the student;
such software is described in Chap. 34. To understand the operation of modem
microprocessor-based controllers, the student should have hands-on experience
with these instruments in a laboratory.
Chapter 1 is intended to meet one of the problems consistently faced in presenting
this material to chemical engineering students, that is, one of perspective.
The methods of analysis used in the control area are so different from the previous
experiences of students that the material comes to be regarded as a sequence of
special mathematical techniques, rather than an integrated design approach to a
class of real and practically significant industrial problems. Therefore, this chapter
presents an overall, albeit superficial, look at a simple control-system design
problem. The body of the text covers the following topics:
1 . Laplace transforms, Chaps 2 to 4.
2. Transfer functions and responses of open-loop systems, Chaps. 5 to 8.
3. Basic techniques of closed-loop control, Chaps. 9 to 13.
4. Stability, Chap. 14.
5 . Root-locus methods, Chap. 15.
6. Frequency-response methods and design, Chaps. 16 and 17.
7. Advanced control strategies (cascade, feedforward, Smith predictor, internal
model control), Chap. 18.
8. Controller tuning and process identification, Chap. 19.
9. Control valves, Chap. 20.
10. Advancedp rodceysnsamics, Chap. 21.
11. Sampled-data control, Chaps. 22 to 27.
12. State-space methods and multivariable control, Chaps. 28 to 30.
13. Nonlinear control, Chaps. 31 to 33.
14. Digital computer simulation, Chap. 34.
15. Microprocessor-based controllers, Chap. 35.

jsipt1937

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