Project

SIMULINK STATE CONTROL LOGIC FOR WASHING MACHINE AND GEAR SHIFTING

AAniket Tiwari4 Nov 2020

AIM:

TO IMPLEMENT CONTROL LOGIC IN SIMULINK SHOWING A STATE FLOW PROCESS FOR WASHING MACHINE AND GEAR TRANSMISSION

OBJECTIVES:

1) Generate a Simulink model for washing machine at various state conditions

2) Generate a Simulink model for gear shift transmission at various speed level

SIMULINK MODEL-1: CONTROL LOGIC OF WASHING MACHINE AT VARIOUS STATES

Principle: It is a machine which is capable of handling various tasks like washing, rinsing, drying, soaking within short period of time. All the task performed by the machine is based on centrifugation. It is a separation process which uses centrifugal force to promote accelerated settling of particles in solid-liquid mixture.

Fig.1. Washing Machine

GIVEN DATA:

The different states for washing machines

a. Soaking – 200 secs (0-200secs)

b. Washing – 100 secs (200-300secs)

c. Rinsing – 20 secs (300-320secs)

d. Drying – 50 secs (320-370secs)

e. Completed

MODEL:

SUBSYSTEM:

STATE FLOW:

BLOCKS USED IN THE MODEL:

a. Constant – Power and water supply

b. Slider switch – Turns the machine On and Off

c. Lamp – It indicates the signal

d. State flow – Control logic

e. Muff – Converge the signal for display

f. Display – To show the output signal

PROCESS EXPLANATION:

a. The power and water supplied to machine indicates ON and OFF of the machine which is defined by constant value 0 and 1.

b. The slider switch and lamp are activated accordingly showing the conditions of supply of water and power to the machine.

c. The signals proceed with the given state flow logic, if the value displayed is 1 then power and water are supplied to the machine and if the values are 0 and 1 then machine will not start the process as one of the sorce is OFF.

d. When both power and water are 1 then the soaking process start and run for 200 secs after which washing starts.

e. The rinsing starts after 300 secs, after which drying process starts for which water supply is cut off.

f. After completing all the tasks, the machine turns OFF after 370 secs.

g. The finish lamp is green indicating the process is completed.

h. For all the different process or states of the machine, lamp indicates green for working and red for not working. This gives the user a better idea about current process inside the machine.

DIFFERENT STATES OF MODEL:

1) SOAKING

CONCLUSION: AFTER SUPPLYING THE POWER AND WATER TO THE MACHINE, THE SOAKING PROCESS CONTINUOUS FOR 200secs, THUS SHOWING GREEN LAMP AS AN 'ON STATE' AND DISPLAYING 1 INDICATING SOAKING PROCESS IS BEING CARRIED OUT IN THE WASHING MACHINE.

2) WASHING

CONCLUSION: AFTER SOAKING PROCESS (200secs), THE WASHING PROCESS CONTINUOUS FOR 100secs, THUS SHOWING GREEN LAMP AS AN 'ON STATE' AND DISPLAYING 1 INDICATING WASHING PROCESS IS BEING CARRIED OUT IN THE WASHING MACHINE.

3) RINSING

CONCLUSION: AFTER WASHING PROCESS (300secs), THE RINSING PROCESS CONTINUOUS FOR 20secs, THUS SHOWING GREEN LAMP AS AN 'ON STATE' AND DISPLAYING 1 INDICATING RINSING PROCESS IS BEING CARRIED OUT IN THE WASHING MACHINE.

4) DRYING

CONCLUSION: AFTER RINSING PROCESS (320secs), THE DRYING CONTINUOUS FOR 50secs, THUS SHOWING GREEN LAMP AS AN 'ON STATE' AND DISPLAYING 1 INDICATING DRYING PROCESS IS BEING CARRIED OUT IN THE WASHING MACHINE.

5) COMPLETED

CONCLUSION: AFTER DRYING PROCESS (370secs), THE WASHING MACHINE STOPS. SHOWING GREEN LAMP AS AN 'ON STATE' AND DISPLAYING 1, INDICATING THAT ALL THE PROCESS HAS BEEN CARRIED OUT IN THE WASHING MACHINE SUCCESSFULLY.

SIMULINK MODEL-2: CONTROL LOGIC OF GEAR SHIFT TRANSMISSION FOR VARYING SPEED LEVELS

Principle: When we push the shifter sleeve towards the desired gear, the gear locks onto the main shaft and rotates it. Thus, the main shaft rotates at the speed of the engaged gear and provides the output as per the gear’s ratio. Shifting of gear simply means going from one gear to another by sliding or clicking the shifter. Downshifting means going to a lower gear i.e decreasing the speed, and upshifting means going to a higher gear i.e increasing the speed.