Week -2

1.

The simulink model of Solenoid using Doorbell

For input values we use a pulse generator.

Since, the switch is closed for 2 seconds, phase delay is changed to 2 seconds in pulse generator.

To connect pulse generator to switch Simulink to PS convertor is used as Switch is a physical system.

For Electrical circuit, Electrical reference and for mechanical circuit, mechanical reference is used.

And Solver configuration is used for initial conditions.

Pulse generator output is shown below.

 

OUTPUT:

Here, we can observe that switch is closed for 2 seconds afterthat switch is open.

The plunger strikes for every 2 seconds and we can observe that.

2.

Simulink model to sense the temperature of heator and turn on or turn off the fan.

 To get required given values we use Signal Builder and give the input values.

Simulink to PS convertor is connected between signal builder and temperature source.

Input Values is given as below.

Electrical reference and thermal reference are used for Electrical and thermal circuits. 

Total time period for model is 50 sec, so sop time is 50 sec.

ON and OFF conditions of Fan were given as 1 and 0 constants to switch. 

Display is connected to switch  and run the model.

As per conditions fan should be ON for above 25 degree celsius and otherwise off so, after the model is ran the display ouput is given to the threshold value in the switch.

So when the temperaure is above threshold value the fan is ON.