Electromechanics and MEMS (2013) – Solutions
Manual – by Jones
What is a system? - answers-A system is a set of interconnected components working together
to achieve a specific objective using inputs and outputs.
Define electromechanical system. - answers-An electromechanical system integrates
mechanical components with electrical, electronic, and computer-based control systems to
perform a function.
Who coined the term electromechanical and when? - answers-The term electromechanical was
coined in 1969 by a senior engineer of YASAKAWA, Japan.
Give two examples of electromechanical systems. - answers-Automatic washing machine and
air conditioner.
What are the three fundamental electrical quantities? - answers-Charge, current, and voltage.
What is a control system? - answers-A control system regulates the behavior of a system to
obtain desired output by controlling the input.
Define open-loop control system. - answers-An open-loop control system is one in which the
output is not fed back to the input.
Give two examples of open-loop control systems. - answers-Traffic light system and washing
machine operating on preset time.
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, Define closed-loop control system. - answers-A closed-loop control system is one in which the
output is fed back and control action depends on the output.
Give two examples of closed-loop control systems. - answers-Air conditioner and radar tracking
system.
Main disadvantage of open-loop system. - answers-It cannot correct errors because feedback is
absent.
Main advantage of closed-loop system. - answers-It provides high accuracy through feedback.
Difference between open-loop and closed-loop systems. - answers-Open-loop has no feedback
while closed-loop has feedback.
Which system is more accurate? - answers-Closed-loop control system.
Block diagram of electromechanical system - answers-Input → Controller → Actuator →
Mechanical System → Output with sensor feedback.
Function of controller in control system. - answers-It processes input signals and generates
control action.
Function of actuator. - answers-It converts electrical signals into mechanical motion.
Function of sensor. - answers-It measures output and provides feedback.
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Manual – by Jones
What is a system? - answers-A system is a set of interconnected components working together
to achieve a specific objective using inputs and outputs.
Define electromechanical system. - answers-An electromechanical system integrates
mechanical components with electrical, electronic, and computer-based control systems to
perform a function.
Who coined the term electromechanical and when? - answers-The term electromechanical was
coined in 1969 by a senior engineer of YASAKAWA, Japan.
Give two examples of electromechanical systems. - answers-Automatic washing machine and
air conditioner.
What are the three fundamental electrical quantities? - answers-Charge, current, and voltage.
What is a control system? - answers-A control system regulates the behavior of a system to
obtain desired output by controlling the input.
Define open-loop control system. - answers-An open-loop control system is one in which the
output is not fed back to the input.
Give two examples of open-loop control systems. - answers-Traffic light system and washing
machine operating on preset time.
1
, Define closed-loop control system. - answers-A closed-loop control system is one in which the
output is fed back and control action depends on the output.
Give two examples of closed-loop control systems. - answers-Air conditioner and radar tracking
system.
Main disadvantage of open-loop system. - answers-It cannot correct errors because feedback is
absent.
Main advantage of closed-loop system. - answers-It provides high accuracy through feedback.
Difference between open-loop and closed-loop systems. - answers-Open-loop has no feedback
while closed-loop has feedback.
Which system is more accurate? - answers-Closed-loop control system.
Block diagram of electromechanical system - answers-Input → Controller → Actuator →
Mechanical System → Output with sensor feedback.
Function of controller in control system. - answers-It processes input signals and generates
control action.
Function of actuator. - answers-It converts electrical signals into mechanical motion.
Function of sensor. - answers-It measures output and provides feedback.
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