Week -2

1). Make a Simulink model of Doorbell using solenoid block.

Ans= First i have to make this model by using these block that is:-

• Pulse generator
• Simulink PS converter
• Switch block
• Battery
• Solver
• Solenoid block
• Ideal translational sensor
• Scope
• PS simulink converter
• Electrical reference and Mechanical reference

Pulse Generator:- The pulse generator is used to create square wave pulse. the parameters in this block are Amplitude, period, pulse width, phase delay.

Simulink PS converter:- This block is used to convert simulink signal into physical signal.

Switch block:- The switch is used to close or open the circuit.

Battery:- The battery is used to provide the power to circuit.

Solver:- The solver is used to calculate the mathematical equation the background.

Solenoid block:- The solenoid block is the combination of electrical and mechanical parts.

Ideal translational sensor:- This block is used to sense the movement in circuit.

Scope:- This block is used to see input and output signals.

PS simulink converter:- This block is used to convert physical signal in to simulink signal.

Working:- Pulse generator is used to create the pulse by providing the value of amplitude=1, period=4, pulse width=50, phase delay = 2sec which is shown in simulink model (input in scope 1). after that their is Simulink-PS converter which convert input simulink signal by pulse generator into physical signals. then input in switch to work according to delay of 2 seconds, and battery source provide electrical power to whole circuit. the solenoid has electrical and mechanical component that work upon battery source by switch, when the switch is provide signal the solenoid mechanical part attract toward electrical part by electromagenatizing which produce alarm as doorbell. then the ideal translational motion sensor help to sense the movement of solenoid plunger, the signal which is sense by motion sensor that is physical then i use PS-simulink converter to convert physical signal into simulink signal and then i have to connect the scope 2 to get output which is shown in simulink model that is output in scope 2. also i have to connect display which the value of 8.139e-10.

2). Use a Thermistor to sense the temp of a heater and turn on or off the fan.

ans= Firstly i have use many block to make this simulink block diagram are

• Repeating sequence
• simulink ps converter
• ideal temperature source
• Thermistor
• voltage source
• Resistor
• Battery
• Solver
• Constants
• Switch
• scope

first i have to provide the temperature input to repeating sequence i.e:- 0-10 sec 293k, 10-30sec 300k, 30-50sec 296k. then simulink ps converter convert simulink signal to physical signal, then the ideal temperature source which is near the thermistor which sense the temperature and a voltage sensor that will sense the heating of fan to provide back signal to thermistor to off the fan and PS simulink connected to the voltage sensor to convert physical signal to simulink signal and then switch whose value is same set as dsipaly to get best value then we see it in scope and signal graph is plot in the simulink model that is for input scope and out scope