Week - 4

WEEK-4

OBJECTIVE:

1. 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

2. Make a Simulink chart for the “Gear shift” logic as per the below conditions:

Speed Range(km) 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.

Control logic of a “washing machine” using Stateflow:

WORKING PRINCIPLE OF WASHING MACHINE:

Explanation: The working principle of a washing machine is centrifugation. Centrifugation is a separation process that uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture. The washing machine consists of a centrifuge for this purpose.

Inside the washing machine, there are few processes are carried out-in successive period of time. they are

• soaking
• washing
• rinsing
• drying

SIMULINK MODEL:

Washing machine in working condition

EXPLANATION:

BLOCKS ARE USED:

CHART: Chart is used to implement control logic with a finite state machine.

Lamp: The lamp block displays a color indicating the value input signal.

PROCEDURE:

• Input values of this model are water and power
• 1 indicates power is on and supplying water flow. 0 indicates power is off and water supply is off.
• implement control logic in the chart. check power and water to give condition power==1.
• soaking time 0 to 200 sec to give input on soaking
• after 200sec give 100sec for washing.
• then give 20 sec for rinsing and 50 sec give input for drying

Given data:

• soaking-200sec
• washing-100sec
• rinsing-20sec
• drying-50sec
• completed

• give water and power as inputs and socking, washing, rinsing, drying given as outputs.

• Lamps are used to working given commands in washing machines that indicate different colors.
• The washing machine was not working all the lamps shows in red color.

“Gear shift”:

The word shifting describes something that is taking a new direction either physically or in thought. If you've recently decided that the earth may be round, you are shifting from a flat-Earth viewpoint to a round-Earth one. Shifting can be used in several senses, but the constant in all of them is change and movement.

Simulink chart for the “Gear shift” logic:

Given conditions:

Speed Range(kmph) Gear

0 to 15 1

16 to 25 2

26 to 40 3

41 to 60 4

Above 61 5

SIMULINK MODEL:

BLOCKS USED:

GAUGE: Gauge block displays the connected signal 0n circular scale during simulation.

SLIDER GAIN: Slider gain performs the scalar gain that you can modify during simulation. modify the gain using slider parameter

EXPLANATION:

• As per the question gears are arranged 0 to 15 speed in first gear. 16 to25 2nd gear, 26 to 40 in 3rd gear, 41 to 60 in 4th gear above 60 speed in 5th gear chart as designed such a way.
• drag the gauge from simulink library and drag costabt block, slider gain connected with gauge it shows the spped
• slider gain changes the speed.

• display shows the wich gear on going based on the speed.
• lamp is connected to output. lamp displays the green colour in first gear and each gear will produce individual color.

• give speed as input. gear as output
• For the first gear,0 to 15 kmph

• for the second gear, 16 to 25kmph

• For the third gear, 26 to 40kmph

• for the 4th gear,41 to 60kmph

• For the 5th gear, above 60kmph.