Simulink Model of Doorbell using solenoid block

Aim:

Make a Simulink model of Doorbell using solenoid block.

Conditions:

Switch is closed for 2 seconds and then released.

Blocks used in model:

• Pulse Generator
• Switch
• Battery
• Solenoid
• Ideal Translational Motion Sensor
• Mechanical Translational Reference
• Electrical Reference
• Scope

Simulink Model:

Model Explanation:

A pulse generator is given as input with the following specifications. The condition was that the bell is engaged for 2 s and then released. Same was implemented by giving period as 4 seconds and pulse width as 50% of 4 seconds, i.e, 2 seconds. Phase delay was given as 2 seconds, so the simulation starts from the unengaged condition of switch.

The signal from the pulse generator was converted using a Simulink-PS converter and is given as the input to the switch. A Solenoid is introduced and battery is connected to it. The voltage of the battery connected was made as the same as that of the rated voltage of the solenoid. The Switch is also connected to the same circuit. The position of solenoid plunger is measured using an ideal translational motion sensor connected to the circuit. Initial position was set to 5mm in translational motion sensor. Both mechanical and electrical references were connected to the respective circuits. The output from the ideal translational motion sensor is converted using a PS-Simulink converter and is given to the scope to display the results. A scope was also connected to the input to visualize its behaviour. The spring constant and damping parameters of the solenoid block was altered to obtain desired graph.

Input Signal:

Results:

The simulation was run for 30 seconds and the result obtained is shown above. It can be observed that, at each 2s interval the bell is ringing.