Control logic of a “washing machine” using Stateflow and “Gear shift”

Aim:

1. Implement control logic of a “washing machine” using Stateflow.
2. Make a Simulink chart for the “Gear shift” logic.

Software used: 

       MATLAB R2020a_Simulink

Theory: 

  1. Given conditions for "washing machine" Stateflow:

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

  Washing Machine Stateflow chart:

Procedure:

• Initially, the Inputs, power & water supply are connected to the chart, through slider switches by initiating constant values 0 and 1 as a condition for ON and OFF.
• In the chart, the flow process is initiated as per the given conditions.

        Flow_1: Power & Water supply - checking water supply(If power is ON) - Filling water(If the water supply is ON) - Soaking - Washing - Rensing - Drying - Finish.

        Flow_2: Power & Water supply - checking water supply(If power is ON) - No_water(If water supply if OFF) - Finish.

        By using junction box will repeat the process after Finish/End

• The outputs are specified as Fill water(FW), Soaking(A), Washing(B), Rensing(C), Drying(D), Finish(E) and displayed the condition and LEDs.
• If the condition is satisfied the LEDs show a "Green" color, else a "Red" color.

Stateflow process: 

• When the only power source is ON & the water supply is OFF.

        If the water supply is OFF the flow will get terminates after checking the water supply and then the process gets END. 

                                                                     1                                                                           2                                                                                                                               

                                                3 

• When the both Power and water supply is ON

                                                                       1                                                                                                         2

                                                                 3                                                                                                                    4 

                                                               5                                                                                                                       6    

           worksheet:

   2. Given conditions to make a Simulink chart for the "Gear Shfit" 

          Speed Range(kmph)        Gear No.

              0 to 15                         1

             16 to 25                        2

             26 to 40                        3

             41 to 60                        4

             Above 61                       5 

         Gear Shift chart:

•         When the speed is at 35KMPH

•         When the speed is at 84KMPH

                  worksheet:

  Blocks used:

         constant: To input to slider gain

         Slider gain: To change the speed of the vehicle

         Chart: To create Gear shift flow

         Display: To view the gear number.

 Flow process:

          Constant - Slider gain - Gear shift chart (Gear1, Gear2, Gear3, Gear4, Gear5) - Gear Number.

         By changing the speed in the slider gain the gear number changes by following the flow process defined in the chart.

 Conclusion:

 Hence, 

• Implemented the control logic of a “washing machine” using Stateflow.
• Created a Simulink chart for the “Gear shift” logic.