Week -2

#Part:-1

Aim: make a simulink model of doorbell using solenoid block with the following details this model main work on electromagnet.

Following block diagram

Explanation:-

1) Battery: If you select infinite for the battery charge capacity parameter battery as a serise internal resistance & constance voltage source .if a you select finite for battery energy capacity parameter .battery as a serise internal resistance pulse a charge depends voltange source defined by V=Vnom * (soc/(1-beta * (1-soc )),(soc=stete of charge & three diffrent parameter main ,dynamics,variables)

2) Similink-PS converter: conveter the simulink input signal to physical signal. you can direct either provide the explicity through addition signal port or turn on input firtering to calculate time derivatives.you can selects to zero.

3) pulse genrator:Pulse genrator block is used to create square wave pulse regulor intervals .you can used variable step & fisex step solver.

4) Switch: Switch controller by external physical signal"if the external physical signal ps is greater than the threshold then the switch is closed ,otherwise the switch is open "closed resistancw difined by G both parameter must be greater than zero .

5) solenoid: solenoid block are used in electrical and mechanical solenoid valve are connected between battery and switch port C is connected with mechanical refrerance .

6) Ideal transformal motion sensor:The ideal translational motion sensor block device mesuered velocity or displacement in a mechanical translational network you can specify the intial postion as a block parameter.

7)PS- Simulink converter:converts the input physical signal to a simulink output signal.you can selected output signal unit.

8) Scope:Scope are show output result in pulse & Sine weve.

9)Elctrical refrence:This are used for support electrical parameter.

10)Mechanical translational refrence:This block used for remove electrical short circuit current through the ground.

# Scope result:

t:

#Output result:When are give a signal to Switch then pulse genreted for 2 sec.when the switch is closed the solenoid block receive electrical power from the battery & heat the bell.

#Part:-2

Aim: Use a thermistor to sense the temprature of s heater & turn ON or Turn OFF the Fan as per the below conditions.

Temprature source: 293k from 0 to 10 sec.

300k from 10 to 30 sec.

296 from 30 to 50 sec.

Fan condition:-ON temp above 25 degree c. OFF otherwise.

Explanation:

At point 1 time =0 sec.,temp=293k

At point 2 time =10sec.,temp=300k

At point 3 time=30 sec.,temp=300k

At point 4 time=30 sec. temp=296k

At point 5 time=50 sec. temp=296k

1)Constant:Firstly give a temprature value for calculate the threshold value.

2)Reapetive seaqunce stair: Discrete time sequence is output to represent this block usedfor input signal according to the input candition give.

3)Simulink-PS converter : Block are used to convertes the simulink input signal to physical signal derivatives calculate.

4)Controlled temorature source: can maintain a controlled temp diffrence regading of a heat flow rate .the temp set by the physical port s .A positive temp diffrence cources the temp at port is to be greater than the temp at port A.

5) Thermal reference:This block represent a refrence point in thermal network.Where temp is equal to zero .

6) Solver configuration:This block provided for solver setting information for simulation .

7)Thermistor:Negative temprature coefficeant are used for the controlled the temprature & relation between resistance & temprature.

8)Battery :This battery give a 12v to thermistor battery charge capacity are infinity open circuit mesurment temprature are 298.15 k.

9)Resistor:resistor are provide the opposing nature of current a cicuit.

10)Switch:pass through input 1 when input 2 satisfies the selected criteria .The first & Thrid input port are data port& select input is a controlled port.

11)Voltage senser:The voltage senser is used to convert the voltage mesurment between two point into a physical signal.it should controlled in parellel only.

12)PS-Simulink converter:convert physical signal to simulink signal.

# Scope result:

#Output result:Which is below the threshold 293k.After 10s.temprature gose to 300k then the switch will be ON condition as the temprature exceeds 298k Ater 30s fan will turn OFF as the temprature come down to 296k.which below the threshold temprature of 293k.from the above condition evaluated.