Check whether the indicated
application is best represented by an open-loop or closed loop
control system model. If you think there is some
ambiguity, discuss as necessary.
APPLICATION (2 Points each)
OPEN LOOP
CLOSED LOOP
Standard LED flashlight
Antilock Braking System (ABS) in a car
Distance traveled by fireworks, i.e. bottle
rocket
DVD player disc rotation speed
Cruise control in a car
Turning on a faucet in a sink
Automatic flash used in your smart phone
camera
Accelerator pedal in a...
Decide whether each of these statements is True (T) or False
(F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False
(F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which
is a measure of the...
Draw and carefully and thoroughly label a block
diagram of an “open loop” control system.
Draw and carefully and thoroughly label a
block diagram of a “closed loop” control system.
Considering a geyser in a home, classify each of the
following as an open system, closed system,neither or both:
(a) the geyser is being filled with cold water
(b) hot water is being drawn from the tap
(c) the geyser leaks
(d) the heater is turned on to heat the water
(e) the geyser is full and the heater is turned off.
Classify each of the following thermodynamic systems as “open”,
“closed”, or “isolated”. For “open” or “closed”, specify how matter
or energy can be transferred between the system and
surroundings.
(a) Root beer in an unopened can
(b) Root beer in an open can
(c) A LED lamp (off)
(d) A LED lamp (lit by an external electrical circuit)
(e) A frog.
(f) Ice, liquid water, water vapor, and air in a sealed,
perfectly insulated thermos bottle
(g) The Sun.