This document discusses using fuzzy logic for automated speed control in vehicles. Fuzzy logic is well-suited for control applications like traffic and temperature control. It can represent complex systems using fuzzy sets instead of binary logic. For vehicle speed control, fuzzy logic is used to sense obstacles using distance sensors and control the vehicle's speed based on the angle of the obstacle to prevent collisions. This system allows the vehicle to slow down or stop if obstacles subtend an angle greater than 60 degrees. Fuzzy logic control could help reduce accidents by taking over critical functions from human drivers.

1. FUZZY LOGIC IN AUTOMATED MOBILES
BY
K.Hemanth Sankar

2. Outlines
• Abstract
• Fuzzy logic Introduction
• Results and discussions
• Applications
• Advantages
• Conclusion
• Future scope
• References

3. Abstract :
• Automobiles have become an integrated part
of our daily life.
• Due to the speed of automobiles now a days
highway accidents are happening frequently.
• The automated speed control system prevents
this accidents which is possible with FUZZY
LOGIC(artificial intelligence).
• This is based on obstacle sensor unit.

4. FUZZY LOGIC :-
• THIS LOGIC IS BEST SUITED FOR CONTROL
APPILICATIONS SUCH AS TRAFFIC, TEMPERATURE.
• FUZZY LOGIC SEEMS TO BE MOST SUCCESFULL IN
TWO CASES:-
1. Very complex models where understanding is
strictly limited, in fact, quite judgmental.
2. Processes where human reasoning, human
perception , or human decision making are inextricably
involved.

5. FUZZY LOGIC REPRESENTATION:-
Slowest(snail)
 For every problem it
[ 0.0 – 0.25 ]
must represent in
terms of fuzzy sets.
Slow(tortoise)
[ 0.25 – 0.50 ]
 For different speeds Fast(dog)
the logic differs from
[ 0.50 – 0.75 ]
each other.
Fastest(cheeta)
[ 0.75 – 1.00 ]

6. FUZZY LOGIC IN CONTROL
SYSTEMS:-
 Fuzzy Logic provides a more efficient and resourceful
way to solve Control Systems.
 Some Examples
 Temperature Controller
 Anti – Lock Break System ( ABS )

7. COMPLEXITY vs. PRECISION IN THE
MODEL:-

8. FUZZIFICATION AND DEFUZZIFICATION:-
• Fuzzification is the process of making a crisp
quantity fuzzy.
• Defuzzification is the conversion of a fuzzy
quantity to a precise quantity.

9. OBSTACLE SENSOR UNIT:-
• THIS SENSES THE DISTANCE OF OBSTACLE INFRONT
OF THE CAR.
• AS THE SPEED INCREASES THE SENSING DISTANCE
ALSO INCREASES.
• THE SPEED OF THE CAR IS TAKEN AS THE INPUT AND
THE DISTANCE SENSED BY THE SENSOR IS
CONTROLLED.

10. FROM THE GRAPH IT IS CLEAR THAT
THE SENSING DISTANCE ALMOST
VARIES LINEARLY WITH SPEED.

11. SPEED CONTROL:-
The speed of the car is
controlled according to the angle subtended by the
obstacle. The minimum angle it can overcome is 60 .
• SPEED BRAKER:-
• FLY OVER:-

12. OBSTACLES WHICH THE CAR CANNOT
OVERCOME:-
• At any instant, if the angle subtended by the obstacle is
greater than 60 , then the car comes to rest before
colliding with the obstacle.

13. The angle is taken as the i/p & the o/p speed is
controlled.
Input membership function:-
• From the graph it is clear that the speed
becomes zero when the angle of the obstacle
is greater than 60 .

14. • The rules are not only applicable to obstacles
but also small pit, subway etc,.
• Rear Sensing: This fuzzy control can be
extended to rear sensing by placing a sensor
at the back side of the car, and can be used to
control the motion of the car when the wheals
rotate in the opposite direction or when the
car is in rear gear.

15. APPLICATIONS:
• Auto car parking system
• Temperature Controller
• Anti – Lock Break System ( ABS )

16. ADVANTAGES :
• Avoid accidents
• Less strain on human
• Easy to operate

17. CONCLUSION:-
• The fuzzy logic control system can relieve the
driver from tension and can prevent accidents.
• This fuzzy control unit when fitted in all the
cars can result in an accident free world.

18. FUTURE SCOPE
• Now it is using only in costly cars like
BENZ,BMW,AUDI etc..in future we can get it
for any cars.

19. REFERENCES
• [1].www.fuzzy.com
• [2]. www.wikipedia.com
• [3]. www.maxim-ic.com
• [4]. www.youtube.com
• [5]. www.chrontel.com

21. QUERIES???????