Week - 4

Q 1. Implement control logic of a “washing machine” using Stateflow as per given sequence:

• 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

After all the processes have completed turn on the finished LED.

ANS:-

• Step 1: If the power source = 0 (slider switch on OFF position), power supply is not available & system will not be activated.

• Step 2: If the power source = 1 (slider switch on ON position) & water source = 0 (toggle switch on OFF position), then the power supply will turn ON & water supply will not be available. So, system will not be activated.

• Step 3: If the power source = 1 (slider switch on ON position) & water source = 1 (toggle switch on ON position), then the power supply will turn ON & water supply will be available. So, system will not activated.After all process completed, end lamp will turn ON.

• The power supply ON at t=10s.
• The Water supply ON at t=20s.
• Soaking start at t=30s & stop at t=230s.
• Washing start at t=230s & stop at t=330s.
• Rinsing start at t=330s & stop at t=350s.
• Drying start at t=350s & stop at t=400s.
• Then finish the work.

Refer the below graph-

Q 2. Make a Simulink chart for the “Gear shift” logic as per below conditions:

Speed Range(kmph) Gear

0 to 15 1

16 to 25 2

26 to 40 3

41 to 60 4

Above 61 5

Give speed input while the simulation is running & display the gear number.

ANS:-

• Step 1: If the constant Power = 0 (slider switch on OFF position), then the power will turn OFF, and the Lamp indicates the Red Colour and Gear shifting mechanism will not be activated.