Week -2

1, Simulink file of Door bell -  https://drive.google.com/file/d/11JKsNcVYM4yzWvR4gUCXphEbYUtLOXjl/view?usp=sharing

Report:-
       Here we used step block to produce 2sec of simulink input,It converted to physical signal by using simulink-PS Converter ,This physical signal tranfered from subsystem to main system with thw hwlp of connection port and feed to switch's control port. 50V dc source used to power the solenoid the source controlled by the switch .electrical reference block also used to ground the circuit.In the solenoid C port connected to mechanical translation reference for grounding/ clamping ,And the physical signal from R port connected to ideal translation motion sensor in subsystem (motion sensor). Here connection port used in this subsystem for transfer physical siganal from main-system and the physical signal from R port is directly connected to the R port of ideal translation motion sensor and C port grounded by mech-translational reference.The physical output from the sensor convereted to simulink output by using PS-simulink converter, this connected outport for transfer simulink output to main-system .For get the graphical representation output connected to Scope.The solver configuration connected to physical network to specifies the solver parameters.

 Result:-

From the output we can seen that when we giving 2sec of physical signal, the solenoid moving plunger goes to negative polarity that means plunger is attracting to closer and when we off the physical signal after 2 sec it comes to rest position in a oscilating way, due to the tention of plunger rode

2,Simulink file of Thermistor controlled cooling fan -  https://drive.google.com/file/d/1-sdhCAcsRsKpY4YWObRQ4T9btyEUXjWB/view?usp=sharing

Report:-
We need to give the input signal in the form 0-10sec 293K,10-30sec 300k and 30-50sec 296k to creating this type variable input as per the time we using signal builder, we can create the infinite siganals in any time duration in signal builder.The created signal connected to Goto block and simulink PS converter .Goto block transfer the signal to its corresponding taged "from block".Here it is used to scope the input signal .The converted physical input signal from simulink-PS converter connected to S port of Controlled Temperature Source, A port of this block connected to Thermal refference and B port connected to Thermistor's A port. When port S get physical siganal the respective controlled heat flow will occur from port A to B.Thermistor's port A conneceted to controlled Temperature source's port B and +ve terminal connected to 100v DC source and a resistor with 1ohm resistance connected series with thermistor .One voltage sensor connected parellel to the resistor to measure the voltage getting accross, with respect to thermistor resistance value change.The physical output from voltage sensor tranfered to subsystem(TRIGGER) by using connection port .We finded the output voltage value(.099) from voltage sensor in 25 degree temp with the help of scope .And give the voltage value as threshold value of switch in subsystem(TRIGGER). When the temperature is higher than 25 degree the voltage sensor output will greater than .099 then the output of switch in subsystem(TRIGGER) will be 1 ,If the temperature is below 25 degree voltage will also lesser then switch output will  0. The output of switch connected to goto block and simulink PS converter,Goto for scope the output and converter for output get in physical signal.This physical signal used to controll the another switch that controll the supply to DC motor.This switch threshold value we give between 0 to 1 because the physical control signal 0 or 1.The DC motor values are not given, We takes that No load current =.15A,DC voltage in no load =100V.The DC motor connected to the Switch and DC source negative polarity ,The negative polarity connected to Electrical Reference .DC motor rotor side port R is connected to a Ideal rotational Motion Sensor R port and C port of both Motor and sensor conneceted to Mechanical Rotational Reference.The Ideal rotational Motion Sensor output port W gives the Angular velocity as physical signal that connected to subsystem TACHO for calculate RPM in that subsystem physical signal coverted into simulink input and it divided by constant value "6" by using product block.The output of product block connected to Goto and output block.This output port connected to Display for seen the Rpm of motor after run time.All the From blocks are conneceted to a scope to see the values from corresponding Goto bocks

 Result:-

Successfully created the circuit of cooling fan by using thermistor .From the output can see that the input temperatures is greater than or equal to 298k (25 degree) the fan will get run it in rated rpm until it gets cooled for below 298k (25 degree).

293k (20 degree ) - fan is in off condition

300k (27 degree ) - fan is in on condition (runs in full rpm = 2.41rpm )

296k (23 degree ) - fan gets off (goes 2.41 to 0 rpm)