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Adaptive Cruise control

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sadaptive cruie control step before intelligent vehicles

sadaptive cruie control step before intelligent vehicles

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    Adaptive Cruise control Adaptive Cruise control Presentation Transcript

    • SHIJO.T.DANIEL S5 MECHANICAL ROLL NO : 859 REG NO : 11020125
    • OUTLINE Introduction History Cruise control Adaptive cruise control (ACC) components of ACC Working Acceleration & Deceleration Controlling ACC Dealing with switches
    • Features Advantages Limitations Future aspects ACC used vehicles Conclusion References
    • INTRODUCTION Increased accident rate Factors Need o0f intelligent vehicles Invention of Cruise control
    • HISTORY 1910 speed control with centrifugal governor Modern cruise control - Ralph Teetor-1945 First car in 1958 Started in cars from 1974
    • 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
    • ADAPTIVE CRUISE CONTROL (ACC) Advanced version Keeps at steady speed Using sensors for detection Keeps safe distance Intelligent control Collision avoidance system
    • MAIN COMPONENTS ACC Switches and pedals Processor or mini computer Sensor Electronic vacuum actuator
    • WORKING OF ACC Switch on ACC. Set speed. Sensors detects vehicle ahead. Decelerate to ahead vehicle speed. Keeps safe distance Collision avoidance system
    • 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.
    • ACCELARATION & DECELARATION ACC Accelerator Actuator controls the throttle
    • CONTROL OF ACC BRAIN: Mini computer. Senses throttle position. Senses accelerator position. Adjust throttle Senses ahead vehicles
    • 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
    • CONTROLLER Sensing and controlling process
    • Car with fusion sensor arrangement Car with fusion sensor arrangement
    • ACC COMPONANTS IN A CAR
    • DEALING WITH SWITCHES
    • 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.
    • 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.
    • 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.
    • 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.
    • ACC EQUIPED VEHICLES Ford fusion series Jaguar Mercedes Benz Volkswagen Audi Chevrolet cruze (India)
    • 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.
    • 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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    • THANK YOU FOR LISTNING