Part1:
Working principle of a washing machine:
A washing machine by spinning at 800-1600rpm helps soap and dirt with it to leave the surface of the cloth via centrifugal
force and into outlet pipes hence utilizing centrifugal to both clean and partially dry the clothes loaded in it.Thus the
processes are electrically controlled, such as the drum,valves,pump,motor and heating.the valve opens again and the dirty
water drains out of the drums.The pump works to help get rid of the water.The valve lets clean water in again into the
drums.The four process are:
SOAKING:
It is used to dip clothes in detergent water to remove dirt from the clothes.In this function customer need to select soak
from a panel. Soak- This function is available with wash timer,In 42min of washing 27 min is soak and 15min machine will
wash the clothes.
RINSING:
The dirty, soapy water is drained,then the washing machine is refilled and your clothes are "rewashed"in clean water. spin
All the water is drained completely,then your clothes are spun very fast and excess water is removed thanks to centrifugal
force.
DRYER:
They work by pushing warm dry air through your wet washing to extract moisture, then cooling the now humid air in
a heat exchanger to condense the moisture, which is collected in a tank or pumped down the drain. The (now dry) air is
reheated and
the cycle repeats.
1) STATE-FLOW:
Systematic solution of a problem is possible with sequential, unambiguous and realizable finite process step set. This set is called "algorithm" and it
is one of the most important part of the programming languages. In this study, it is represented how to learn algorithm by using
Simulink Stateflow. In flow diagram-based algorithm learning.
CONTROL LOGIC OF A WASHING MACHINE:
It checks for the extent of dirt and grease, the amount of soap and water to add, direction of spin, and so on. The machine rebalances washing load to
ensure correct spinning. Else, it reduces spinning speed if an imbalance is detected.
Even distribution of washing load reduces spinning noise.
The two inputs are given for the power and water supply. Once the inputs are given outputs are displayed by the flow chart as
per the given sequence. The system are observed for sometime then it is checked and the process is completed by green light
as displayed.
2) GEAR SHIFT LOGIC:
A gear shift mechanism for a manual transmission includes a shaft axially
movable for selecting shift planes and rotatable for engaging the gears defining
the shift planes. The shaft is held in a reference shift plane by two helical springs.
GEAR SHIFTING MECHANISM:
Mechanical devices that enable the driver to engage gears in such a way as to obtain the desired transmission ratio are
called shifting mechanisms.
EXPLANATION FOR GEAR SHIFTING MECHANISM
USING SIMULINK:
Step 1: Create a chart and enter the given
conditions for gear shifiting.
Step 2: After entering the input conditions in
the chart, Go to Symbols pane and assign
the given variable. (Example: input data,
Output data,etc..)
Step 3 : Connect the 'Slider Gain to vary the
speed while simulation is running.
Step 4: Create Constant and giving value 1
and o for turning on & off.
Step 5 : Create 'Lamp' to Indicate the power
is on or off.
Step 6: Use display' Block to display the
Gear position.
Giving Speed = 60 km/hr in the
Speedometer, if the speed is between 41
km/hr - 60 km/hr 4rd Gear will activate as
per the given condition.Gear position is
displayed below in the Simulink model.
Likewise, changing the speed in the
Speedometer according to the given
condition, Gear position will change.
RESULTS:
1) Thus the control logic of a washing
machine using stateflow is processed as per
the given sequence and LED lights are turns
to the green colour and the system is
completed.
2) A simulink model is created for the
gear shift logic and using slider gain the
values are obtained.
