Week - 4

AIM : TO implement control logic of a washing machine using stateflow in simulink.

OBJECTIVE :

Here, the main objective is to implement the control logic of a washing machine using stateflow as per given sequences :

• If the power supply is available , the system gets activeted.
• If the water supply is not available , stop the process and indicate through LED.
• Soaking time should be 200 sec followed by washing time of 100 sec.
• Then rinsing for next 20 sec and dryer for 50 sec.
• After finishing of all processes turn on the finished led.

THEORY :

STATEFLOW :

• Stateflow provides a graphical language that includes state transition diagrams , flow charts , state transtion tables , and truth tables .

Working Principle of washing machines :

The working principle of a washing machine is centrifugation. Centrifugation is seperation process that uses the action of centrifugal force that uses the action of centrifugal forces to proote accelerated setting of particles in a solid-liquid mixture .

MODEL :

BLOCK USED :

1. Slider switch
2. constant block
3. chart
4. disply
5. lamp

Explanation :

• Creating chart :

Here for given conditions ,we have given water_supply and power_supply as input of the chart.

And water,soak,washing,rinsing,dryer,cycle as output of the chart.

• Water_supply is connected to constant which is connected to slider switch through which we can give 'ON'/'OFF' conditions.
• Power_supply is connected to constant which is connected to slider switch through which we can give 'ON'/'OFF' conditions.
• Output from the chart is connected to display which shows the outputs.
• output is connected with bulb which indicates the process by colour of bulb which is green for running process and red for end of the process.

LOGIC :

• when we give input through slider switch ie 'ON'/'OFF' ,it will define value in constant block ie '1'/'0' for respective conditions.
• Now if we take value of water_supply is 0 then it which passes to state flow logic which will not start the process according to our requirement.
• now if both switches are 'ON' ,then process start and it will takes 200 sec of soaking.
• After 200 sec of soaking ,it will take 100 sec of washing and then rinsing happen for 20 sec and drying for 50 sec.
• At end of process the bulb will indicate green signal which means that the process is completed sucessfully.

OUTPUTS :

If water supply supply is not available and power is available :

After competion of all process :

CONCLUSION :

• If we power is on and water is not supplied then it will indicated red light.
• If both power and water supply is available then it will indicate green light.

Here given below is link for simulink model,

https://drive.google.com/file/d/1wzZIMbiEISge8ZV56n2tFcWuIIaPdL9D/view?usp=sharing

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AIM : To make a simulink chart for gear shift logic for given conditions.

OBJECTIVE :

• To make a simulink chart for gesr shift logic for given conditions:

Speed Ranges (kmph) Gear

0-15 1

16-25 2

26-40 3

41-60 4

Above 61 5

• Giving speed input while the simulation is running and displaying the gear number.

MODEL :

BLOCK USED :

• custum gauge : To indicate speed .
• Slider gain : it acts as throttle to increase or decrease of speed.
• Lamp : To indicate gear position .
• constant : To multiply with the slider gain .
• Chart.

Chart:

EXPLANATION :

• Here the custum gauge is connected to slider gain which is given as input to the chart .
• output of chart is connected to display ,which shows the position of gear which is then indicated through lamp.
• According to given data the range of speed and gear position are as below:
• For first gear ,speed is 0-15kmph.
• For second gear , speed is 15-25 kmph.
• For third gear, speed is 25-40 kmph .
• For fourth gear , speed is 40-60 kmph.
• For fith gear , speed is above 60 kmph.

OUTPUTS :

FIRST GEAR :

SECOND GEAR :

THIRD GEAR :

FOURTH GEAR :

FIFTH GEAR :

CONCLUSION :

• Here we have display the postion of gear by different colours.
• Outputs of gear speed according to speed of car is shown.

Here given below is link for simulink model,

https://drive.google.com/file/d/1i2256kfgn5iQcO4bhHcKe6vBfDSn_asY/view?usp=sharing