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2419286
Control
Description
Computer control
No tags specified
control
ict
Mind Map by
James Rushton
, updated more than 1 year ago
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Created by
James Rushton
over 9 years ago
9
0
0
Resource summary
Control
Computer control means that a computer is part of the control system
Sensors
Device to measure some physical quantity
Heat
Light
pH
Humidity
Advantages
Can operate 24/7 without needing to rest
Work without wages
Can be used in dangerous environments
Disadvantages
May cost a lot of money to develop
If there is a power cut or the computer malfunctions it will not work
ADC (Analogue to Digital Converter)
Sensors take analogue measurements.
It must be converted to digital (0s and 1s)
Process
Computers can only follow rules that is has programmed in the control system
Output
Sending the message and the resulting action
Open loop feedback
Takes no account of the output
Simple to create
Feedback system
The output is fed back to become part of the input
More precise control
More complicated to create
Actuator
Allows a computer to control movement or action
Examples
Washing machines
Automatic doors
Traffic light systems
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