Week - 4

Aim:

1. To implement a control logic of a “washing machine” using Stateflow as per the 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.

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.

Solution:

Model 1- The Control logic of a "Washing machine" using State flow.

Model :-

The blocks used in the model :-

• Slider Switch - To switch on and off the machine.
• Constant Block - For the Power and Water supply.
• Chart - The stateflow for the control logic
• Display - To display the output signals.
• Lamp - LED's used to show the output signals.

Given Data:-

The different states of washing machine:

• Soaking - 200 seconds (0-200)
• Washing - 100 seconds (200-300)
• Rinsing - 20 seconds (300-320)
• Drying - 50 seconds (320-370)
• Finished

The State flow of the Model:-

The model when the water supply switch is turned off:-

The different states of the washing machine :-

Soaking:

Washing:

Rinsing:

Drying:

Model 2- Simulink chart for the "Gear Shift" logic as per given conditions.

Model :-

Blocks used in this model :-

• Gauge - It acts as a speedometer of vehicle.
• Constant block - It is to multiply with the slider gain.
• Slider Gain - It acts as throttle to increase or decrease the speed.
• Chart - The control logic for the gear shifting.
• Display - To display the gear output.

Given Data :-

• 1st Gear : 0-15kmph
• 2nd Gear : 15-25kmph
• 3nd Gear : 25-40kmph
• 4th Gear : 40-60kmph
• 5th Gear : >60kmph

The Stateflow of the model :-

The gears shifts at different speeds :-

Gear 1:

Gear 2:

Gear 3:

Gear 4:

Gear 5: