Week -2
- 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.
2. Use a thermistor to sense the temperature of a heater & turn on or turn off the fan as per 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
- Thermistor
Input given:
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
Simulink model:
Simulink model explanation:
The Signal builder used for the temperature input at set time points.
The Controlled Temperature Source block represents an ideal source of thermal energy that is powerful enough to maintain specified temperature difference across the source regardless of the heat flow consumed by the system.
1.Door bell
- 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.
Simulink model
input signal:
The switch block used is controlled by external signal. If the external signal is greater than thresh hold parameters then the switch closed, otherwise switch is open.
The positive terminal of the switch is connected to negative terminal and negative terminal connected
The solenoid block is connected with in the circuit with switch and battery and we will get the complete electrical circuit. The port “C” connected with mechanical reference.
The ideal translational sensor is connected with solenoid block R to observe the movement of plunger.
Scope is connected with the ideal translational sensor to get the output.
PS – Simulink & Simulink to PS converter being used.
Solver being used for each simscape blocks.
Output:
Time period 2 sec given to the pulse generator to open and close the switch. When the switch is closed
The solenoid blocks receive electrical power from the battery source and the plunger will move R to C
To hit the bell and produce sound.