Week -2

Q.1.Make a Simulink model of Doorbell using solenoid block with the following details:

Solution:

AIM: Create a simulink model of Doorbell using solenoid block.

this is the simulink model for doorbell.

in this above figure we can see diffrent diffrent types of block and diffrent diffrent colour. so what is the mening of colour.

Black colour block is Non-physical constant and green colour block denote Physical constant means we connect it directly.

Block used:

1.pluse genrator (amplitude:1, period (secs):4, %of period:50 phase delay:2)

2.battery

3.switch

4.solver configuration

5.electrical reference

6.Mechnical traslational reference

6.ideal traslational motion sensor

7.solenoid

8.display

9.scope

10. ps simulink converter

THEORY:

pluse genrator: it genrate square wave pulses at regular intervals.this block waveform parameters,amplitude pulse with period and phase delay.

solver configuration: solver configuration is nothing but a form of equction.

ideal traslational motion sensor: it can be define as a device that converts an across variable measured between two mechnical traslational nodes into a control signal proportional to velocity or position.

Mechnical traslational reference: this block represents a reference point,or frame for all mechanical traslational ports.

solenoid:The solenoid is modeled as an inductance whose value L depends on the plunger position x.

ps simulink converter:The Simulink-PS Converter block converts the input Simulink signal into a physical signal.

from the figure doorbell are switch, solenoid,battery,bell and a plunger solenoid block represent the actual solenoid and battery block also use. solenoid battery are connected with the terminal.and the current flow between the battery block and solenoid block and a switch block is also use switch blocl ue to control the physical signal .in case the physical signal ps is greter than the value given in thershold parameter then the switch is closed otherwise the switch is open. now the battery block switch block and the solenoid terminal are grounded with electrical refrence.electrical refrence is also called as the electrical ground in this system the negative terminal of the battery and the solenoid.

RESULT:

Conclusion: A simulink model of doorbell using solenoid block is built.this model is physical bell phenomina is developed where the switch is closed for 2 seconds and then relesed.

Q.2 Use a thermistor to sense the temperature of a heater & turn on or turn off the fan as per the below conditions:

MODEL:

result: