Week - 4

CONTROL LOGIC OF ‘WASHING MACHINE’ USING STATEFLOW

OBJECTIVE:

To 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

SIMULINK MODEL:

STATEFLOW DIAGRAM:

DESCRIPTION:

Power and Water Values are given as Input to the State Machine. Initial State Transition conditions are based on Power and Water Values. If the condition is true, Transition to next states takes place. Later state transitions are based on Time conditions. Inputs and Outputs of the Chart (State Machine) is added through ‘Add Inputs and Outputs’ option.

SIMULINK MODEL OUTPUT:

• No Power
  • When Power=0, The Condition fails at 1^st State itself. No State transition occurs and no further progress.

• Power=1 & No Water
  • As Power=1, The 1^st Condition is satisfied and state transition to next state occurs. But as the next condition is failed, No_Water state is executed.

• Power=1 & Water=1 (During Process)

As Power=1 and Water=1, Next Condition is satisfied and further states are executed as per the Control Logic of Time Period

• Power=1 & Water=1 (FINISH)

After all states are executed, The Last State returs ‘Finish’ value as 1.

CONCLUSION:

Thus, The State flow Model to implement the Control Logic of a Washing Machine is implemented.

Simulink chart for the “Gear shift” logic

OBJECTIVE:

To 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.

SIMULINK MODEL:

STATEFLOW CHART:

DESCRIPTION:

Control Logic is set based on Speed – Gear Relation. If the Control Logic satisfies, State Transition takes place and its equivalent Gear value is given as Output.

SIMULATION OUTPUT:

• Speed=44 Kmph

As per the Speed Value, Based on Control Logic 4^th State is executed.

• Speed = 59 Kmph

As per the Speed Value, Based on Control Logic 5^th State is executed.

• Speed = 23 Kmph

As per the Speed Value, Based on Control Logic 2^nd State is executed.

CONCLUSION:

Thus, A Simulink Chart for the ‘Gear Shift’ logic as per the given conditions is made.