sadaptive cruie control step before intelligent vehicles

1. SHIJO.T.DANIEL
S5 MECHANICAL
ROLL NO : 859
REG NO : 11020125

2. OUTLINE
Introduction
History
Cruise control
Adaptive cruise control (ACC)
components of ACC
Working
Acceleration & Deceleration
Controlling ACC
Dealing with switches

3. Features
Advantages
Limitations
Future aspects
ACC used vehicles
Conclusion
References

4. INTRODUCTION
Increased accident rate
Factors
Need o0f intelligent vehicles
Invention of Cruise control

5. HISTORY
1910 speed control with centrifugal governor
Modern cruise control - Ralph Teetor-1945
First car in 1958
Started in cars from 1974

6. CRUISE CONTROL
Cruise control - automatically controls the speed
of a motor vehicle.
 Also known as speed control or auto cruise.
Adjusting the throttle position to maintain a
speed set by the driver

7. ADAPTIVE CRUISE CONTROL
(ACC)
Advanced version
Keeps at steady speed
Using sensors for detection
Keeps safe distance
Intelligent control
Collision avoidance system

8. MAIN COMPONENTS ACC
Switches and pedals
Processor or mini
computer
Sensor
Electronic vacuum
actuator

9. WORKING OF ACC
Switch on ACC.
Set speed.
Sensors detects vehicle ahead.
Decelerate to ahead vehicle speed.
Keeps safe distance
Collision avoidance system

12. When the danger of a collision is
detected, it provides a red warning light
that flashes on the windshield.

The system provides an audible alert
when it senses a reduction in traffic
speed in vehicles ahead.

13. ACCELARATION & DECELARATION
ACC Accelerator
Actuator controls the throttle

14. CONTROL OF ACC
BRAIN: Mini computer.
Senses throttle position.
Senses accelerator position.
Adjust throttle
Senses ahead vehicles

15. LIDAR is Light Detection And Ranging.
 A laser diode was used to generate the light
signal.
RADAR is Radio Detection And Ranging
 It is operated by radiating energy into space and
detecting the echo signal reflected from target

While RADAR target is the car’s rear spoiler the
stereo camera is constantly captures all objects in
its field of view.
It includes millimeter wave radar linked to a
640x480 pixel stereo camera

16. CONTROLLER
Sensing and controlling
process

17. Car with fusion sensor
arrangement
Car with fusion sensor arrangement

18. ACC COMPONANTS IN A CAR

19. DEALING WITH SWITCHES

20. FEATURES
Maintains a safe, comfortable distance between
vehicles without driver interventions
Maintains a consistent performance in poor
visibility conditions.
Maintains a continuous performance during road
turns and elevation changes
Alerts drivers by way of automatic braking.

21. ADVANTAGES
It’s very useful for long driving.
The driver is relieved from the task of careful
acceleration, deceleration and braking in
congested traffics.
Can avoid unconsciously violating speed limits.
Reduction in accident rate.
Reduction in driver fatigue.
Increased fuel efficiency.

22. DISADVANTAGES
Cost
Not for heavy traffic
Dangerous in slippery roads
Encourages the driver to become careless.
The ACC systems not respond directly to the
traffic signals.

23. FUTURE ASPECTS
Co-Cooperative Adaptive cruise control or
CACC is already being tested in California .
ACC respond to the distance and speed of the
car ahead ,CACC communicate with two or
more cars and work together to avoid collision.
 Communication is quicker, reliable and
responsive.

24. ACC EQUIPED VEHICLES
Ford fusion series
Jaguar
Mercedes Benz
Volkswagen
Audi
Chevrolet cruze (India)

25. CONCLUSION
Current system ranges 150 meters can stop and
slows if any obstruction
Fully autonomous car is probably not viable in the
foreseen future.
Near by vehicles would be in constant
communication with each other and act cooperatively.
It will probably take decades, but car accidents
may eventually become almost as rare as plane
crashes are now.

26. REFFERENCE
1.
University of Michigan (July 12, 2004). U-M physicist:
Smart cruise control eliminates traffic jams. Press release.
2.
L. C. Davis (2004). "Effect of adaptive cruise control
systems on traffic flow". Physical Review Letters E 69 (6): 066110
(article ID; no page reference).
3.
CY Liang, H Peng (1999). "Optimal Adaptive Cruise
Control with Guaranteed String Stability". Vehicle System
Dynamics 32 (4-5): 313-330.
4.
P Venhovens, K Naab, B Adiprasito (2000). "Stop and Go
Cruise Control". Proc. FISITA World Automotive Congress, Seoul,
Korea.
5.
L. C. Davis, “Effect of adaptive cruise control systems on
traffic flow” Physics Department, University of Michigan, Ann
Arbor, Michigan 48109, USA The American Physical Society
(Received 27 October 2003; revised 22 January 2004; published 4
June 2004)

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