Table of contents
Importance of feedback in a control system
s19 33 Q6 [3]
- To ensure that the system operates within the given criteria
- … by enabling system output to affect subsequent system inputs
- … thus enabling the system to automatically adjust conditions
Describe the use of feedback in a control system
s19 33 Q6 [4]
Hints:
- Sensors continuously measure.
- Readings sent to processor, compared with expected.
- If exceeds criteria, machines turned on.
- Feedback ensures that …(the condition).
Example: An indoor swimming pool is to be kept at constant temperature of 28 degrees.
- Sensors continuously measure the temperature of the water in the swimming pool.
- Readings are sent to a processor and compared with 28 degrees.
- If the reading is out of range then actuators turn the heater/cooler on or off as necessary.
- Feedback ensures that the water temperature remains close to 28 degrees.