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Questions

Question 1

What is the fundamental definition of a control system as described in the text?

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Question 2

Which of the following is NOT listed as one of the four primary reasons for building control systems?

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Question 3

In the context of control systems history, who invented the flyball speed governor to control the speed of steam engines?

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Question 4

What is the distinguishing characteristic of an open-loop system according to the text?

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Question 5

In a closed-loop system, what is the signal resulting from the algebraic summation of the input signal and the feedback signal called?

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Question 6

Under what specific condition is the actuating signal in a feedback control system also called the error?

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Question 7

Which of the following are the three major objectives of control system analysis and design?

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Question 8

The total response of a linear system is the sum of which two components?

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Question 9

What is the condition called when a system's natural response grows without bound, leading to a loss of control?

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Question 10

In the antenna azimuth position control system case study, what is the effect of increasing the gain of the signal amplifier on the steady-state error?

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Question 11

According to the six-step control system design process outlined in Figure 1.10, what is the first step?

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Question 12

In Step 4 of the design process, which physical laws are mentioned as being used to develop a mathematical model for electrical and mechanical systems, respectively?

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Question 13

Which standard test input represents a constant command, such as a desired position or velocity?

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Question 14

Who is credited with extending the stability criterion from third-order systems to fifth-order systems in 1874, forming what is now known as the Routh-Hurwitz criterion?

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Question 15

What graphical technique, developed by Walter R. Evans in 1948, is used to plot the roots of a characteristic equation of a feedback system as a parameter is varied?

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Question 16

In the context of the design process, what is a 'compensator'?

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Question 17

What is the primary advantage of using a digital computer as the controller in a modern control system?

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Question 18

What does a robust design in control systems aim to achieve?

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Question 19

In the control systems analysis and design process, what is the purpose of using standard test inputs like steps and ramps?

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Question 20

What is the nature of the relationship between force and displacement for an ideal spring component in a translational mechanical system?

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Question 21

A temperature control system that senses the difference between the thermostat setting and the actual temperature to open a fuel valve is an example of what type of system?

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Question 22

What is the main function of the 'input transducer' in a generic control system block diagram?

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Question 23

The development of analysis techniques for feedback amplifiers in the 1920s and 1930s by H. W. Bode and H. Nyquist led to what is currently known as:

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Question 24

An example of an open-loop system mentioned in the text is a toaster. Why is it considered open-loop?

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Question 25

What is the sixth and final step in the control system design process as shown in Figure 1.10?

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Question 26

Which part of a system's total response is dependent only on the system itself and not the input?

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Question 27

In the control system for an aircraft's roll angle as described in Problem 3, what component acts as the plant?

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Question 28

What is the primary advantage of a closed-loop control system over an open-loop one?

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Question 29

What academic background should a student using this textbook ideally have, according to the Preface?

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Question 30

In the control system design process, simplifying assumptions are often made when creating the schematic in Step 3. What is the stated reason for this?

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Question 31

What is the order of the differential equation d2x/dt2 + 6dx/dt + 8x = 5 sin 3t?

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Question 32

The term 'plant' in a control system refers to what?

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Question 33

Why is transient response an important design objective for a system like an elevator?

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Question 34

According to the history section, the Greeks around 300 B.C. engineered a feedback system to keep a water clock's supply tank at a constant level. What modern device uses a similar principle?

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Question 35

What is the primary function of the 'controller' component in a control system block diagram?

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Question 36

If a system is stable, its natural response must do one of two things as time approaches infinity. What are they?

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Question 37

In the human eye's light-pupil system described in Problem 9, what acts as the sensor?

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Question 38

Which analysis and design objective is concerned with the final accuracy of a control system, for example, ensuring an elevator is level with the floor?

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Question 39

In Step 3 of the design process, creating a schematic for the antenna azimuth control system, what simplifying assumption is made about the amplifiers?

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Question 40

A key benefit of studying control systems for engineering students is that it provides a 'top-down systems approach.' What does this mean?

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Question 41

What is the primary trade-off that a control systems engineer must consider between an open-loop and a closed-loop system?

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Question 42

What is the function of the summing junction in a closed-loop block diagram?

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Question 43

What is meant by 'convenience of input form' as a reason for building control systems?

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Question 44

In the context of the history of control systems, 'proportional-plus-integral-plus-derivative' control is also known by what other name?

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Question 45

What is the subject of Step 5 in the control system design process?

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Question 46

In the automatic volume control system for a motorcycle radio described in Problem 4, what acts as a disturbance?

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Question 47

What type of input signal is represented by the function tu(t), where u(t) is the unit step function?

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Question 48

What is the main role of a control systems engineer in the context of a large, multidisciplinary project?

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Question 49

In the antenna azimuth position control system, a potentiometer is used as a sensor. What does it do?

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Question 50

What is the final analysis and design objective listed in Chapter 1, which is considered a prerequisite for the other two?

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