The facilitator led us through the components of any control system, which include Sensors which collect data from a physical system and send signals to the decision making part (Micro processor) or computer which looks at the preset rules it was given beforehand to use in deciding what command to give to the Actuators to perform a certain function within the physical system again. One of the examples of such systems is the operation of the electric cooling fan in a car, The Temperature sensor sends a signal to the computer box indicating that the engine is hot, the microprocessor then commands the fan switch to close the circuit to the fan, to allow current to flow and the fan will run. when the temperature is low, the sensor sends another signal to the microprocessor which commands the switch to open the circuit to stop current flow to the fan, therefore less air will cool the radiator.
We had examples of sensors, mostly switches which are normally open and some are normally closed. We looked at single pole, single throw and double pole double throw as shown in the pictures below.
ingle Throw Switches
This is about the simplest switch--it makes or breaks a contacts between two lugs.
You would typically use this for a power switch.
Dual Throw Switches
This is the most common family of the mechanical switches, dual throw means you are switching one or more lugs between two positions.
We them started to set rules which would be given to the decision making component of a system but i ended up not able to test them on the actual system..
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