Week - 4

1.1 Aim

To Implement control logic of a “washing machine” using State flow. Aftaer all the processes completed turn on the Finished LED. Respective conditions are

• If the power supply is available, the system gets activated
• If the Water supply is not available, stop the process & indicate through LED
• Soaking time should be 200s followed by Washing time of 100s.
• Then rinsing happens for next 20s & dryer runs for 50s

1.2 Analysis

• Design the control logic of the system using 'CHART' block.
• 'Power switch' and 'Water level' are the two inputs given to the sytem.
• 'Water level indicator' and 'finished indicator' are two described outputs of the system.
• Water level indicator turns on when water supply is not available.
• Once all the processes completed, finished indicator turns on.
• Fig.1 shows the control logic of a washing machine using state flow.
• Fig.2 shows the Simulink model of the system when Power and water supply is available.
• Fig.3 shows the Simulink model of the system when water supply is not available.

Fig.1 Control logic of a Washing machine using state flow

Fig.2 Simulink model of the system when Power and water supply is available.

Fig.3 Simulink model of the system when water supply is not available.

1.3 Result

Control logic of a washing machine using state flow using 'Chart' block has been implemented successfully. Water level indicator and finished indicator are working according to the given input condition.

Google drive link of the simulink model :

https://drive.google.com/file/d/1uOETBQBIuyGNay72nXRSpsSJ08q4-uGj/view?usp=sharing

2.1 Aim

To make a Simulink chart for the “Gear shift” and give speed input while simulation is runningand display the gear number. Condition are

Speed Range(kmph) Gear

0 to 15 1

16 to 25 2

26 to 40 3

41 to 60 4

Above 61 5

2.2 Analysis

• Design the state flow to change the gear number for differenet speed as per the condition.
• 'Speed' is given as input to the system and 'Gear number' is taken as ouput from the system.
• Stop time is changed to 'inf' so that we can vary the input while running.
• Fig.4 shows the control logic for gear shift using state flow.
• Fig.5 shows Snapshot of the system for different speed in a single run.
• Fig.6 shows the plot of variation in speed and gear number while simuation is running.

Fig.4 Control logic for a gear shift

Fig.5 Snapshot of the system for different speed in a single run

Fig.6 Plot of variation in speed and gear number

2.3 Result

Control logic of a Gear shift system has been implemented successfully for various speed. As speed increases, we can observe the change in gear number.

Google drive link of the simulink model:

https://drive.google.com/file/d/1uxXZujy9kPdtx5R7uxQyp9OZZedR_IFD/view?usp=sharing