Challenge

Week - 4

DDevdron Dutta27 Mar 2021

CONTROL LOGIC OF WASHING MACHINE USING STATEFLOW:-

STATEFLOW(DEFINITION):- IT IS A GRAPHYICAL REPRESENTATION OF FINITE STATE MACHINE WITH A FLOW CHART DRAWING.

WASHING MACHINE(DEFINITION):- IT IS A MACHINE WHICH CLEANS DIRTY CLOTHES. HERE WE COULD TAKE AN EXAMPLE OF A FULLY AUTOMATIC WASHING MACHINE WHERE CONTROL LOGIC TO WASH CLOTHES IS BASED ON LEVEL OF DIRT CLOTHES HAVE i.e IN LOW, MEDIUM & HIGH, THIS WILL BE SELECTED MANUALLY AND REST ALL STEPS ARE DONE AUTOMATICALLY.

STEPS OF WASHING MACHINE:-

SOAKING
WASHING
RINSING
DRYING

CONDITIONS:-

IF THE POWER SUPPLY IS AVAILABLE,SYSTEM GETS ACTIVATED.
IF THE WATER SUPPLY IS NOT AVAILABLE,STOP THE PROCESS & INDICATE THROUGH LED.
SOAKING TIME WILL BE 200s FOLLOWED BY WASHING TIME OF 100s.
THEN RINSING HAPPENS FOR 20s AND DRYING TIME OF 50s.
AFTER COMPLETION OF WORK A LED TO SHOW FINISHED WORK.

CONSTRUCTION:-

THE ABOVE FIGURE SHOWS THE SIMULINK MODEL OF AN AUTOMATIC WASHING MACHINE:-

TOGGLE SWITCH:- THERE ARE TWO SWITCHES INCLUDED: (a) FIRST TO START THE MACHINE (b) SECOND TO START THE WATER FLOW.
LAMP:- TWO LED LAMP TO SHOW NO WATER FLOW AND FINISHED WORK.
STATE FLOW CHART:- TO DESIGN FLOW CHART FOR STATEFLOW OF WASHING MACHINE.
SCOPE:- TO SEE THE RUN TIME.

THE ABOVE FIGURE SHOWS THE INSIDE CONSTRUCTION OF A WASHING MACHINE:-

STATEFLOW CHART IS BEEN TAKEN IN SIMULINK.
INSIDE CHART FLOW 7 STATE IS BEEN TAKEN.
FIRST:- ITS DEFINED AS POWER, AGAIN IT HAS TWO CONDITIONS: (a) IF NO POWER IS GIVEN OBVIOUSLY SYSTEM WILL NOT START. (b) WHEN POWER GET ON IT WILL CHECK FOR WATER FLOW.
SECOND:- IF WATER FLOW IS NOT APPLIED,THEN SYSTEM WILL STOP ITSELF,AND AS SOON AS IT ATTAINS WATER FLOW IT STARTS TO SOAKING.
THIRD:- SOAKING PROCESS STARTS TO OCCUR(IN THIS CASE FOR 200s).
FOURTH:- AFTER 200s ITS STARTS WASHING CLOTHES(IN THIS CASE FOR 100s).
FIFTH:- AFTER WASHING COMPLETES FOR 100s IT STARTS TO RINSE(HERE FOR 20s).
SIXTH:- WHEN RINSING IS DONE FOR 20s, DRYING ACTIVITY STARTS(IN THIS CASE FOR 50s).
SEVENTH:- WHEN THE COMPLETE CLEANING AND DRYING ACTIVITY IS COMPLETED, IT WILL SHOW A GLOW UP LED FOR COMPLETION OF WORK.

WORKING:-

THE ABOVE FIGURE FOLLOWS FIRST CONDITION, i.e POWER IS ON BUT WATER FLOW IS NOT GIVEN, HENCE THE SYSTEM IS STOPPED.

THE ABOVE SHOWS SECOND CONDITION, WHEN POWER SWITCH IS ON AND WATERFLOW IS ALSO GIVEN, THEN THE MACHINE STARTS TO WORK AND COMPLETES IT WORK, AS WE CAN SEE THE FINISHED LAMP GLOWS.

HERE, WE CAN ALSO PLACE SEPARATE LAMP FOR EACH OPERATION(ON CUSTOMER'S DEMAND). BUT THIS CASE ONLY NECESSARY LAMPS ARE GIVEN.

GRAPHYICAL REPRESENTATION FOR TIME TAKEN:-

SOAKING:-(200secs)

WASHING:-(FOR 100secs)

RINSING:-(FOR 20secs)

DRYING:-(FOR 50secs)

FINISH:-(TOTAL TIME TO FO WORK)

CONCLUSION:-

WITH THE ABOVE SIMULATION WE CONCLUDE THAT OPERATOR FIRST HAVE TO INSERT DIRTY CLOTHES AND DETERGENT MANUALLY AND JUST SWITCH ON THE POWER, IMMEDEATELY THE SYSTEM WILL SHOW TO OPEN THE WATER FLOW AND THATS ALL TO DO MANUALLY, AFTER 370secs CLOTHES WILL BE CLEANED AND DRYED UP TO USE.

SIMULINK CHART FOR GEAR SHIFT USING STATEFLOW:-

GEAR:- THERE ARE TWO TYPES OF GEAR SYSTEM i.e A MANUAL AND AN AUTOMATIC. IN THIS CASE WE WILL DEAL IN AUTOMATIC GEAR, IN THIS SIMULATION WE WILL SEE HOW GEAR IS SHIFTED ACCORDING TO SPEED, WE WILL JUST ENTER SPEEN AND AUTOMATICALLY SYSTEM WILL DECIDE THE GEAR NUMBER.

CONSTRUCTION:- (SIMULINK MODEL)

THE ABOVE FIGURE SHOWS THE SIMULINK MODEL FOR GEAR TRANSMISSION:-

CHART:- ITS A STATEFLOW CHART WITH FLOW CHART OF GEAR COMBINATION WITH SPEEN INSIDE.
POWER SWITCH:- TO GET IGNITION ON OR OFF, AND ITS CONNECTED TO POWER CONSTANT AND IGNITION.
POWER CONSTANT:- IT SHOWS THE STATUS OF ENGINE ON OR OFF BY 0&1.
THROTTLE:- IT IS USED TO GIVE SPEED AND IS CONNECTED TO SPEED CONSTANT AND SPEED.
SPEED CONSTANT:- SHOWS THE SPEED.
SPEEDOMETER:- IT IS SET TO SHOW SPEED IN METER AND IS CONNECTED TO SPEED BLOCK.
GEAR DISPLAY:- SHOWS THE RESULTANT GEAR w.r.t SPEED.