Week - 4

Aim :

1. Implement control logic of a “washing machine” using Stateflow .
2. Make a Simulink chart for the “Gear shift” logic as per below.

Conditions for both cases :

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

Give speed input while the simulation is running & display the gear number.

2. 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.

Points To Remember :

Control logic :

It is the part of a controller that defines how a reactive system responds to events or conditional changes. Applications for control logic include: Supervising how to switch between different modes of operation. Scheduling a sequence of tasks or steps for a system.

Stateflow :

Stateflow (developed by MathWorks) is a control logic tool used to model reactive systems via state machines and flow charts within a Simulink model.

1st Case :

Implementing control logic of a “washing machine” using Stateflow :

Sate Flow Logic :

Simulink Model for Washing Machine :

1.Supplying the Power & Water as 1 & 1 respectively for given model.

2.Supplying the Power & Water as 0 & 1 respectively for given model.

3.Supplying the Power & Water as 1 & 0 respectively for given model.

4.Supplying the Power & Water as 0 & 0 respectively for given model.

Input & Output Ports :

Explanation :

1.To create a simulink chart as per the satisfying all input conditions.

2.Open and check the symbol panel data to proper inputs & outputs.

3.Connecting the led lamps & displays properly.

4.Constants 1 & 0 keep changing which are connected to power and water supply Switches(on/off)

2nd Case :

Making A Simulink chart for the “Gear shift” logic :

Gear Shift Simulink Model :

For Speed<15 [Gear 1]

For Speed<25 [Gear 2]

For Speed<40 [Gear 3]

For Speed<60 [Gear 4]

For Speed>60 [Gear 5]

Input & Output Ports :

Variation in Gear Shifts :

Explanation :

1.To create a simulink chart as per the satisfying all input conditions.

2.Open and check the symbol panel data to proper inputs & outputs.

3.Connecting the scope & display properly.

4.Variatrion on slider gain leads to show the gear position in the display block.

Conclusion :

Hence Satisfying the both cases with as per Mentioned conditions.