Week - 4

(1)AIM:-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

After all the processes have completed turn on the finished LED

• STATEFLOW:-

• It can used for graphical representation of a machine consisting of states,conditions and transitions.

• SIMULINK MODEL:-

• As Shown in above model,we are using chart block for graphical representation of given condition for running the washing machine.
• Slider switches are used for trigger the power and water inputs by connecting with the constant blocks to provide the condition by toggling the swithes.
• Displays are used for give output about the whole process of the washing machine.
• Lamps are used for indication of the various state of the machine.

• CONTROL LOGIC:-

• Here is the control logic of the washing machine under given conditions.
• In the state flow chart,we first apply the condition for motor on by writing [POWER_SUPPLY==1].If it is not avaliable then the process is terminated by given condition [POWER_SUPPLY==0].If it is on than go to next step.
• We apply the condition [WATER_SUPPLY==1] for checking the availability of water.if not then the process is terminated by given the condition [WATER_SUPPLY==0].if it is on than go to next step.
• After power supply is on and Water is avaliable than soaking the clothes for next 200 sec by writing the condition after(200,sec).
• The motor runs forward and backward direction to wash the clothes for next 100 sec by writing the condition after(100,sec).
• After washing,rinsing is going to start for next 20 sec and dryer is used for 50 sec to dry the clothes by writing the conditions after(20,sec),after(50,sec).
• after all process are done the finish lamp is glow and terminated the process.

• OBSERVATION:-

• POWER:-

• Here power=off and water=0ff

• power=on and water=off.

• SOAKING:-

• Power=on,water=on,soak=on,t=10 sec

• WASHING:-

• Power=on,water=on,wash=on,t=230 sec

• RINSING:-

• Power=on,water=on,Rinse=on,t=330 sec

• DRYING:-

• Power=on,water=on,dry=on,t=350sec

• FINISH:-

• Power=on,water=on,finish=on,t=450 sec
• So , these all are the states of the washing machine while it is running.and also we can get washing machine states at which it is currently working by using lamp indicator.

• CONCLUSION:-

We conclude that by using chart block we can easily built any of the machine working states for any time intervals.

(2)AIM:- 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:-

• SIMULINK MODEL DESCRIPATION:-

• As shown in above model, we are using chart block for gear shift logic for given condition.
• Constant block is use to give input to the chart block through slider gain which is nothing but a one kind of throttle.we can increase or decrease the value of constant block while simulation is running.
• Scope and display are used for give output about gear shift at given input speed to the chart block.
• Lamps are used for give indication about the gear at which our control logic works.

• CONTROL LOGIC:-

• As shown in above logic,we are putting some condition which given in the question.
• If our vehicle speed is between 0 to 15 than gear 1 will be apply.
• If our vehicle speed is goes above 15 than gear 2 will be apply by writing the condition [SPEED>15].if this condition is true than go to next state oherwise go to previous state.
• Similarly for GEAR3,GEAR4, and GEAR5,We written the conditon respectively [SPEED>25],[SPEED>40],[SPEED>60].If these conditon are true than it wiil go to next state oherwise go to previous state.

• OBSERVATION:-

• GEAR 1:-

• As shown in above,our vehicle speed is between 0 to 15 than gear 1 is shown by display and lamp.

• GEAR 2:-

• As shown in above,our vehicle speed is between 16 to 25 than gear 2 is shown by display and lamp.

• GEAR 3:-

• As shown in above,our vehicle speed is between 26 to 40 than gear 3 is shown by display and lamp.

• GEAR 4:-

• As shown in above,our vehicle speed is between 40 to 60 than gear 4 is shown by display and lamp.

• GEAR 5:-

• As shown in above,our vehicle speed is above 61 than gear 5 is shown by display and lamp.

• So,we are running our simulation for infinite time and observe the scope about gear shifting by changing the value of speed using slider gain.
• From above scope, it is clear that our gear is shifting with changing the speed by user.

• CONCLUSION:-

By using slider gain we can easily increase and decrease the speed while simulation is running and observe gear number at display as well as through lamp.