ITPEC FE Morning April 2019 Question 4
ITPEC FE Morning April 2019 — Question 4 of 80
Feedback Control — a control method that measures the output and adjusts the process to make the output match a target value.
Feedback control works by continuously comparing the actual output with the desired target. When a difference (error) is detected, the system adjusts its input to reduce that error. A classic example is a thermostat: it measures room temperature (output), compares it to the set temperature (target), and turns heating on or off accordingly.
Why not others:
- (a) This describes sequence control, which executes steps in a fixed, predetermined order.
- (c) This describes feedforward control, which anticipates and counteracts disturbances before they affect the output.
- (d) This describes open-loop control, which operates without monitoring or using the output at all.
Key rule: Feedback control = measure output → compare with target → adjust input.
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