Challenge

Week - 4

SSuprith V N14 Jan 2022

Aim:

To implement control logic of a washing machine using Stateflow as per given sequence

Sequence given:

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.

Simulink Model:

State flow chart:

The blocks used:

Constant
Terminator
Lamp
Rocker Switch
Display

Explanation:

We need to create a washing maching with power,water,soak,rinse and dry respectivelu according to the sequence.At first we need to create an stateflow chart we use the power and water to loop at the first and then we use the flow as following soak rinse and dry.

The soak rinse and dry are given with A=1 and A=0 as inputs or conditions and respectively for others as B,C,D as 1 and 0 respectively we need a break so as the given sequence we use the after command and use the break as 200 100 20 and 50 seconds respectively the inputs are power and water of values 0 and 1.Where 1 is for on and 0 for off respectively.

We need to assign the values as input data or output date so we go to the symbol panel to give the command according as inputs and outputs respectively.

The symbol panel:

We come to the home page of the model and connect the inputs and the outputs for the state floe with the Constant and terminator we use the terminator to connect the lamp and the switch with the respective block.

Conditions:

1)Power off and Water off

2)Power on and water off

In thr above image the values are changed as 1 for power and 0 for water which is on and off respectively.

3)Power on and water on

The gear shift

Aim:

To make a simulink chart for the Gear shift logic as per the given conditions.

The 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

The components used:

Chart
Terminator
Slider switch
Slider
Constants
Display
Scope
Gauge

Simulink Model:

Chart:

EXplanation:

The flow chart explains the conditions of the gear according to the speed given in the sequence.the st and x are the inputs and z and value are output given in the symbol panel.

The slider is connected to the constant as the value in slider changes the input values changes similarly to acceleration.This input goes to the state flow according to the speed the gear is been changed.The another constant is connected to slider switch to show the switch is on or off adn also the terminator to connected to speedometer so that the speed is been noted and the lamp is connecyted to z output to indicate the overspeed if the speed is above 80 the lamp turns red.

Results:

When the engine is off