Challenge

Week - 4

NNihal Arun K P29 Dec 2020

1)CONTROL LOGIC OF A WASHING MACHINE

AIM

To implement control logic of a washing machine using stateflow as per the following 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

BLOCK DIAGRAM

The simulink blocks used here are as follows ,

Constant

Lamp

Chart

Display

Here the chart block inside the stateflow library is used to present the logic underlying the functioning of a washing machine. A chart block implements control logic with finite state machine.

The input to the chart block is given by constant block and the output is connected to multiple display blocks.

Also lamp blocks are used to display colours indicating the value of the input signal and also the output signal. Input signals indicated using lamp blocks are power supply and water supply and the output signals indicated using lamp block is end of the process.

FLOW CHART

Different scenarios are as follows,

When there is no water supply the lamp corresponding to the water output will turn red in colour as shown below,

When there is no power supply the lamp corresponding to the power input will turn red in colour as shown below,

CONCLUSION

Control logic of a washing machine has been successfully implemented using the stateflow chart in Simulink.

2)SIMULINK CHART FOR GEAR SHIFT LOGIC

AIM

To implement control logic for gear shift as per the following conditions sing stateflow chart in simulink,

Speed Range(kmph) Gear

0 to 15 1

16 to 25 2

26 to 40 3

41 to 60 4

Above 61 5

BLOCK DIAGRAM

The simulink blocks used here are as follows ,

Constant

Slider gain

Chart

Display

Scope

Here the chart block inside the stateflow library is used to present the logic underlying the functioning of a washing machine. A chart block implements control logic with finite state machine.

The input to the stateflow chart is given using slider gain block. Here the slider gain is used to change the input value during the simulation. This will mimic speed variations in an automobile while driving.

The output from the stateflow chart is connected to a display and scope which will display the current gear number and the graph between speed and the gear number respectively.

FLOW CHART