Week -2

1.Making a Simulink model of Doorbell using solenoid block :-

In the below arrangement, when the switch is closed the electromagnet receives electrical power from the battery and pulls the metal arm to hit the bell producing sound.

By Creating a situation where the switch is closed for 2 seconds and then released. The following Observation of the physical movement of the plunger is got.

* In the above arrangement the electromagnet recives electricpower from the battery and pulls the metal arm to hit the bell producing sound.

* Pulse genertor is used as input tp create the square wave pulse and here we changed the period.

*The physical block is controlled by the external physical signal.

* If the external signal PS is generator than the threshold the switch is closed or elese the switch is open.

* Postive terminal is connected to the postive and negitive is connected to electrical reference.

*Solver configuration block is defined solver settings fro the simulation.

From above arrangement we can observe the components

1. pulse generator

2. scope

3. ps block

4. Battery

5. Electrical

6. Electrical reference

7. solenoid

8.Ideal translational motion

9. Electrical refernce

10.solver configuration

11. mechanical translational reference.

The above are the obseravtions of solenoid after running the scope.

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2. Thermistor to sense the temperature of heater andto turn and turn off the fan :-

Temperature source: 20 °C from 0 to 10 seconds, 27 °C from 10 to 30 seconds, 23 °C from 30 to 50 seconds

Fan conditions: ON if the temperature above 25 °C, OFF.

below arrangements shows the Thermistor to sense the temperature of heater and to turn and turn off the fan with given values

*The electrical block reference the electrical ground.

*From the above components we use the components:-

1. signal builder

2. simulink -ps connector.

3. controlled temoerature .

4.temperature source

5. battery

6. thermistor .

7. resistor.

8. voltage sensor.

9. scope.

10. switch .

11. solver configuration .

12. Electrical reference.

These are the outputs of the Simulink model of Doorbell using solenoid block.

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