Week -2

Q1. Make a Simulink model of Doorbell using solenoid block with the following details:

In the above 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.

Create a situation where the switch is closed for 2 seconds and then released. Observe the physical movement of the plunger.

Assume remaining parameters.

SOL)

Component required:

1. Pulse Generator (Pulse width 20%, Period 10 sec)
2. Scope (Input and output)
3. Simulink-PS converter
4. Battery (12V)
5. SPST Switch
6. Electrical reference
7. Solenoid
8. Mechanical Translational reference
9. Ideal Translational Motion Sensor
10. Solver Configuration
11. PS-Simulink Converter

Q2. Use a thermistor to sense the temperature of a heater & turn on or turn off the fan as per the below conditions:

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 otherwise

SOL)

Component Required:

1. Repeating Sequence Stair(Vector of output values: [293 300 300 296 296], Sample time:10
2. Scope
3. Simulink-PS Converter
4. Controlled Temperature Source
5. Thermistor
6. Solver Configuration
7. Battery (100V)
8. Voltage Sensor
9. Resistor (100 ohm)
10. PS-Simulink Converter
11. Switch (Threshold 9.5)
12. Display