FEEDBACK CONTROL OF DYNAMIC SYSTEMS
CHAPTERS 1 THROUGH 10 COMPREHENSIVE
SOLVED QUESTIONS AND COMPLETE
ANSWERS
◉ What does the comparator do in a feedback system?
Answer: It compares the actual output with the desired output and
generates an error signal.
◉ What is the difference between open-loop and closed-loop
systems?
Answer: Open-loop systems operate without feedback and cannot
correct errors, while closed-loop systems use feedback to adjust the
output automatically.
◉ Give an example of an open-loop system.
Answer: An electric fan with fixed speed settings.
◉ Give an example of a closed-loop system.
Answer: An air conditioner thermostat that adjusts cooling based on
room temperature.
, ◉ What is the purpose of block diagrams in control systems?
Answer: They visually represent the relationship between input,
controller, plant, feedback element, and output, aiding in analysis
and design.
◉ What does the desired temperature or set point represent in an
air conditioner control system?
Answer: It serves as the target temperature that the system aims to
maintain.
◉ What is the role of the summing point or comparator in an air
conditioning system?
Answer: It compares the desired temperature with the actual room
temperature and computes the error signal.
◉ What does the controller (thermostat) do in an air conditioning
system?
Answer: It decides whether the air conditioner should turn ON or
OFF based on the error signal.
◉ What is a control signal in the context of an air conditioning
system?
Answer: It is the signal sent from the thermostat to the air
conditioning unit to execute commands.
CHAPTERS 1 THROUGH 10 COMPREHENSIVE
SOLVED QUESTIONS AND COMPLETE
ANSWERS
◉ What does the comparator do in a feedback system?
Answer: It compares the actual output with the desired output and
generates an error signal.
◉ What is the difference between open-loop and closed-loop
systems?
Answer: Open-loop systems operate without feedback and cannot
correct errors, while closed-loop systems use feedback to adjust the
output automatically.
◉ Give an example of an open-loop system.
Answer: An electric fan with fixed speed settings.
◉ Give an example of a closed-loop system.
Answer: An air conditioner thermostat that adjusts cooling based on
room temperature.
, ◉ What is the purpose of block diagrams in control systems?
Answer: They visually represent the relationship between input,
controller, plant, feedback element, and output, aiding in analysis
and design.
◉ What does the desired temperature or set point represent in an
air conditioner control system?
Answer: It serves as the target temperature that the system aims to
maintain.
◉ What is the role of the summing point or comparator in an air
conditioning system?
Answer: It compares the desired temperature with the actual room
temperature and computes the error signal.
◉ What does the controller (thermostat) do in an air conditioning
system?
Answer: It decides whether the air conditioner should turn ON or
OFF based on the error signal.
◉ What is a control signal in the context of an air conditioning
system?
Answer: It is the signal sent from the thermostat to the air
conditioning unit to execute commands.
