Week -2

AIM - To make Simulink model for a doorbell using solenoid block

We have used following blocks in the model-

1. Pulse Generator.
2. Switch.
3. Battery.
4. Solenoid.
5. Ideal Translational motor sensor.
6. Mechanical translational reference.
7. Electrical reference.
8. Scope.

RESULTS-

2.

To use thermistor to sense temperature of a heater and turn on/off the fan.

Signal building block is added to input the values as per given conditions.

At point 1, time = 0 sec. to 10 sec. & Temperature = 293K.

At point 2, time = 10 sec. to 30 sec. & Temperature = 300K.

At point 3, time = 30 sec. to 50 sec. & Temperature = 296K.

Controlled temperature source-

This block represents an ideal source of thermal energy that is powerful enough to maintain specified temperature difference across source regardless of the heat flow consumed by the system.

Connection at point A & B are thermal observing ports corresponding to the source of inlet & outlet respectively. port S is the physical signal port through which the control signals that drive the source is applied.

PS SWITCH

• To determine thersold value at voltage sensor at 298k following model is used.

• Result using

1. signal buider instead of constant
2. scope instead ofdisplay

Simulink model -

Final result:

At 0 to 10 sec fan off

At 10 to 30 sec fan on

At 30 to 50 sec fan off