The systems approach

Question 1

Sub system diagrams

Answer 1

Input
Error Detector
Operational Amplifier
Output Driver
Extra Components e.g. heater, motor.
Output

Question 2

The role of feedback in a system

Answer 2

Negative Feedback
The system is constantly trying to achieve the desired output due to it experiencing lag.

Positive Feedback
The system reinforces the detected error. This can be seen when a microphone is held close to a speaker.

Question 3

Closed loop

Answer 3

The system continues to increase and decrease until reaching the desired value. Causing a wave effect in the graph.

Question 4

Closed loop is

Answer 4

Two-state control

in which the op amp is used as a comparator

Question 5

an oven is

Answer 5

two-state control

Question 6

proportional

Answer 6

reduces the error proportionally.
in which the op amp is used as a difference amplifier
more precise than two-state control

Question 7

a car is

Answer 7

proportionally control

Question 8

an error detector must be used in a

Answer 8

close looped system

Question 9

error detector symbol

Answer 9

a bulb with a negative on the top and positive on the left