Week - 4

Automatic washing machine

Objective

Implement control logic of a “washing machine” using State flow 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

Model

Components

Charts

Terminators

Lamps

Rocker switch

Chart

• The constant block is used to give input to input ports power and water supply
• These ports are connected to rocker switches and lamps as follows
• 
  • The state flow logic is written such that if and only if

• Water && power ==1

  then the following processes start.

  • The processes go from soaking, washing, rinsing, drying for 200,100,20,50 seconds respectively.
  • These four states are connected to output ports as follows
  • 
  • The working of these ports is indicated by lamps
  • 
  • The completion of the washing process is indicated by the end lamp which is connected to dry terminal and has following parameters
  • 

  • Results

    Both switches off

  • 

  • One switch on and the other is off

  • 
  • 

• Both switches on

  Case 1 – soaking

• 

• Case 2 – washing

• 

Case 3 – rinsing

Case 4 – drying

Process end

The full working is provided in video format as well

Gear shift logic

Objective

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.

Model

Components

Rocker switch

Slider

Chart

Display

Circular gauge

Chart

• Input is given by connecting a rocker switch to the power port to indicate that the car is on.
• Gears are initiated by if else conditions with respect to the speed parameter.
• The speed is given by using a slider and connecting it to the input port
• This helps us in changing the speed in real time just like in actual automobile and checking which gear is used in which speed range
• The gear value is displayed using display port
• The speed values are displays using a display port and a circular gauge.

Results

Power off

Power on

Case 1 – 0<speed<15

Case 2 – 16<speed<25

Case 3 – 26<speed<40

Case 4 – 40<speed<60

Case 5 – speed>61