Challenge

Week - 4

1. Control Logic of a “Washing Machine”

The control of the washing machine will be activated only if there is power.
For that, a separate chart for power and another chart for control is modelled as shown below

If the output of Power chart is high, then only Control Logic chart will be executed.
Constant value given to Power Chart. '0' indicates no power '1' means there is power.
Control Logic of the washing is modelled as per the control logic chart shown below.

In order to start washing process, power input as well as water to be feeded.
Water input is given as signal from signal builder.
If there is power input and water, Soaking will start. It will continue for 200 seconds (S=1 during this time). After 200 seconds, soaking will be stopped (S=0) and starts Washing.
Washing will continue for 100 seconds (D=1). After 100 seconds, Washing will be stopped (D=0) and Rinsing will start.
Rinsing will continue for 20 seconds (R=1). After 20 seconds, Rinsing will be stopped (R=0) and Drying will start.
Drying will continue for 50 seconds (D=1). After 50 seconds, Drying will be stopped (D=0) and the process finished with alarm signal/ light (A=1).
During Soaking, Washing and Rinsing, if there is no water output (W=0), then the process will stop with RED LED light.
With power input and water entire process for a period of 450 seconds simulated is shown below.

Soaking started at 5th second.
After 200seconds, soaking ends and Washing started
Thereafter 100 seconds washing ends and Rinsing started
Thereafter 20seconds Rinsing ends and Drying started
Thereafter Drying ends, the process ends with alarm signal which lit the blue LED indicating the process finished as shown below.

Stop supply of water

If there is no water available, process stops and LED indicates red light.
For simulating the condition of water stops while processing; the foloowing condition used
Water input stops at 325sec. Signal of water input is shown below.

There is no water input at 325sec. W=0 and RED LED will lit during this condition.
At 325 sec, process stopped during rinsing as shown below.

It can be seen from graphs that Rinsing and Drying not completed.
Saoking & Washing completed and when rinsing started, water stopped and the process stopped with LED indication as shown below.

2. “Gear Shift” logic

Speed input is given using random signal source with speed as [10 22 38 42 70 90 28 20 29 36 48 62 45 36 23] for a period of 150 seconds.
Speed changes during every 10 seconds.
The control logic for gear shifting is shown below.

'g' is the output of chart indicating gear.
When the speed is greater than 0 and less than 16, g=1 (1st gear).
When the speed is greater than 15 and less than 26, g=2 (2nd gear).
When the speed is greater than 25 and less than 41, g=3 (3rd gear).
When the speed is greater than 40 and less than 61, g=4 (4th gear).
When the speed is greater than 60, g=5 (5th gear).
Here there are 5 levels of states. Each represents each gear.
During simulation, speed indicates using a round gauge and gear shift/ gear number indicates using a vertical gauge.
The simulated result of gear shifting is shown below.

Ship work like this
in your own course.