Page 62 - Modern Control Systems

Chapter 1 Introduction to Control Systems

10. Complete the following sentence:
Control engineers are concerned with understanding and controlling segments of their envi-
ronments, often called .
a. systems
b. design synthesis
c. trade-offs
d. risk
11. Early pioneers in the development of systems and control theory include:
a. H. Nyquist
b. H.W.Bode
c. H.S. Black
d. All of the above
12. Complete the following sentence:
An open-loop control system utilizes an actuating device to control a process .
a. without using feedback
b. using feedback
c. in engineering design
d. in engineering synthesis
13. A system with more than one input variable or more than one output variable is known
by what name?
a. Closed-loop feedback system
b. Open-loop feedback system
c. Multivariable control system
d. Robust control system
14. Control engineering is applicable to which fields of engineering?
a. Mechanical and aerospace
b. Electrical and biomedical
c Chemical and environmental
d. AH of the above
15. Closed-loop control systems should have which of the following properties:
a. Good regulation against disturbances
b. Desirable responses to commands
c. Low sensitivity to changes in the plant parameters
d. All of the above
In the following Word Match problems, match the term with the definition by writing the
correct letter in the space provided.
a. Optimization The output signal is fed back so that it subtracts from
the input signal.
b. Risk A system that uses a measurement of the output and
compares it with the desired output.
c. Complexity of design A set of prescribed performance criteria.
d. System A measure of the output of the system used for
feedback to control the system.
e. Design A system with more than one input variable or more
than one output variable.