Week - 4

1) Implement the 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 the next 20s & dryer runs for 50s

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

Blocks Used:-

Constant- 0&1 value represents Power and water supply on or off

Display-Indicates position of washing machine operations 

Lamp- green shows operation ongoing and red shows operation end

Stateflow Chart:-

Explanation:-

Created chart which are having the following input conditions:-

• If the power supply is available the system will get activated.
• If the water supply is available the system starts or else stops the process.
• After that, soaking time should be followed for 200s, washing time of 100s then rinsing happens for the 20s and drying runs for 50s.
• After completing all the processes, turn on the finish LED.
• Then Open the symbol pane and assign given variables like input data and output data.
• In the Constant block, if the value is 0 then the supply will turn OFF and if the value is 1 then the supply will turn ON.
• Display and Lamps will indicate the results

Symbol Pane:-

Power Supply ON position:-

Water Supply ON position:-

All processes are finished:-

Conclusion:-

We have created Stateflow logic for the washing machine model in a sequence which is mentioned in the question and after finishing all processes LED lights to turn green which indicated the process is finished.

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 

Blocks Used:-

Lamp-To indicates engine on-off position.

Constant- 0 value to engine off and 1 value to the engine on

Slider gain- To increase engine speed gradually

Speedometer- To measure or show speed 

Display- To show gear position

Explanation:-

• We created Stateflow by using a chart where we created inputs and outputs conditions, after entering conditions in the chart go to the symbol pane and assign the given variables like input data and output data.
• By connecting the constant block to the lamp we can put values of 0 and 1 to represent the engine on and off.
• Connect the slider gain to vary speed while the simulation is running for infinite time.
• As per speed and gear position conditions which are mentioned in the chart, the display will indicate the gear position.

Stateflow chart:-

Engine ON Position:-

Gear 1 Position:-

Gear 2 Position:-

Gear 3 Position:-

Gear 4 Position:-

Gear 5 Position:-

Conclusion:-

We have created control logic for gear position as per the given conditions of speed and gear position for which we have used a Stateflow chart and a few Simulink blocks like slider gain, speedometer, display etc.