Week - 4

Assignment-1(Week-4)

AIM-1

Implementing the control logic of a washing machine using Stateflow

• 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.

Introduction:

Stateflow can be best explained as a graphical representation of a machine consisting of states, transitions, and conditions. A stateflow chart can be created to define how a MATLAB or a SIMULINK model reacts to external input signals, events, and time-based conditions.

A washing machine has several processes to run, step by step. For instance:

• Checking if the power is on Checking if there is sufficient supply of water for the entire wash
• If the above two are true, soak the clothes in water to prepare for washing
• Wash for a certain period
• Rinse for a certain period
• Dry the clothes for a certain period

Although many more complicated conditions are there in running the washing machine, the above is a very simple representation to give insight into the logical flow of the machine.

Below is a stateflow chart to indicate the procedures:

PROCEDURE

• Water available but Power off
• Only power on
• Power and water not available.
• Soaking
• Washing
• Rinsing
• Drying
• Finished

Output:-

Assignment-2(Week-4)

AIM-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.

.

The entire setup looks like this:

(i)Engine start but speed zero.

(ii)Engine start (speed>0 &speed<15).

(iii)Engine start (speed>26 &speed<40).

(iii)Engine start (speed>41 &speed<60).

(iii)Engine start (speed>61).