Q- Which of the following is Close loop system -
a-)respiratory System b-)traffic light system c-)washing
machine d-)Room heater
my option is A, what is our take on option B & C
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Answer Posted / carl_ellis
A room heater has a thermostat which senses room
temperature and turns the heater elements on or off, as
needed. It is close loop control.
A washing machine can have a closed loop feedback loop, for
example, water level, where a knob sets water level desired
[setpoint], a sensor detects level and turns off water
valve when satisfied. But the overall wash, soak, rinse,
empty, fill, spin functions are sequenced on a timed basis,
which is classic, open loop, non-feedback control.
Likewise a traffic light system can sense the presence of a
vehicle at an intersection, which enables an upcoming light
change, but the sequences of light changes are timer based,
open loop, non-feedback control.
Carl Ellis
Measure First
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