Week -2
Make a Simulink model of Doorbell using solenoid block
ans-case-1 when switch recevied a singal discontinuose assumuing for 2 sec
from the above graph we analysis when suddenly signal recevied by solenoid , plunges of it move toword negative from y=o to y=-3mm then response like underdamped system after some time solenoid stay at approkimate y=-2.5mm and remain same up to signal move toward zero .when input signal for solenoid is completly zero but solenoid pluges start damping and after some time solenoid plunges come with it intial position.
APPLICATION-
OPEN THE DOOR OF CAR-if we want to open the door of car we can use same model thought the communication signal we can give signal from transmitter and recevier generate a pulse signal for some time and though solenoid switch gate will open for some time after signal will become zero then gate will automatically closed tjat is not requied to closed door again and same system will use alarm on when gate open and off when gate of car will close
CASE-2-when continuous signal input to solenoid
As we see the response when continuosly solenoid will received signal then for very small time it will behave like under damped system and will come to final state y=-2mm and remain same up to continuosly received input signal(any type)
APPLICATION-
A-ON AND OFF OF ELECTRICAL VEHICAL-In electric vehicle if we push the start button then solenoid switch connect the supply to motor up to when input signal received by solenoid and when we will cut off input signal from solenoid then it will come to intial position Y=0 and supply cut off from motor and vehical will stop though mechanical braking as well as regenrative braking
B-THIEF PROTECTION OF A CAR-when door of car open without switch of car then solenoid will recevied signal and alarm will start(may be alarm is eletrical alarm or mechanical alarm)
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
APPLICTION-
this type of arrangment use for protection purpose of convention vehical engine as well as electrical vehical from rising of heat due to any malfunction happen in engine the heat will go to rise and then this arrangment use as feedback to driver of car then they will detect though indicator and accordinaly they will responce