ITPEC FE Morning October 2021 Question 20
ITPEC FE Morning October 2021 — Question 20 of 80
Actuator — converts energy into physical movement (rotation, translation) based on control signals.
Control system chain:
- Sensor — detects physical quantities (position, temperature, force) and converts to electrical signals
- Controller — compares target value with sensor reading, outputs operation amount
- Actuator — converts energy into motion to act on the system
- Amplifier — boosts weak electrical signals from sensors
Why not others:
- (a) describes an amplifier
- (b) describes a controller
- (d) describes a sensor
Key rule: Actuator = the "muscle" of a control system; sensor = the "eyes"; controller = the "brain".
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