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ADAPTIVE CRUISE CONTROL ADAPTIVE CRUISE CONTROL ASWATHY.S ASWATHY.S Roll No :14 Roll No :14

Adaptive Cruise Control

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Page 1: Adaptive Cruise Control

ADAPTIVE CRUISE CONTROLADAPTIVE CRUISE CONTROL

ASWATHY.SASWATHY.S Roll No :14Roll No :14

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OUTLINEOUTLINE

INTRODUCTIONINTRODUCTION WHAT IS ACC?WHAT IS ACC? MODES OF OPERATIONMODES OF OPERATION WORKINGWORKING PHYSICAL LAYOUT OF THE SYSTEMPHYSICAL LAYOUT OF THE SYSTEM APPLICATIONSAPPLICATIONS CONCLUSIONCONCLUSION REFERENCEREFERENCE

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INTRODUCTIONINTRODUCTION Adaptive Cruise Control (ACC) adapts the vehicle's speed Adaptive Cruise Control (ACC) adapts the vehicle's speed

to the to the traffic environment. traffic environment. Radar system attached to the front of the vehicle Radar system attached to the front of the vehicle is used to detect slower moving vehicles that are in the ACC is used to detect slower moving vehicles that are in the ACC

vehicle's path. vehicle's path. The system allows the ACC vehicle to autonomouslyThe system allows the ACC vehicle to autonomouslyslow down and speed up with traffic without intervention slow down and speed up with traffic without intervention

from the from the driver. driver. The method by which the ACC vehicle's speed is The method by which the ACC vehicle's speed is

controlled is controlled is via engine throttle control and limited brake operation.via engine throttle control and limited brake operation. Accidents can be reduced up to a great extent.Accidents can be reduced up to a great extent.

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• Adaptive Cruise Control tries to maintain:

Safe Distance when there is a leading vehicle

Set Speed when there is no leading vehicle in its path

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Adaptive Cruise ControlAdaptive Cruise Control Change gear automaticallyChange gear automatically Function properly in poor weather conditionFunction properly in poor weather condition The radar range is 120-150mtsThe radar range is 120-150mts Effective in the speed between 30km-180km/hEffective in the speed between 30km-180km/h

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CLEARANCE : distance from the forward vehicle’s trailing surface to the ACC vehicle’s leading surface.

TIME GAP :the time interval between the ACC vehicle and the target vehicle.

BASIC EQUATIONBASIC EQUATION

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SYSTEM STATESSYSTEM STATES ACC OFF STATE : direct access to the ‘ACC active’ state ACC OFF STATE : direct access to the ‘ACC active’ state

is disabled.is disabled. ACC STANDBY STATE : system is ready for activation by ACC STANDBY STATE : system is ready for activation by

the driver.the driver. ACC ACTIVE STATE : the ACC system is in the active ACC ACTIVE STATE : the ACC system is in the active

control of the vehicle while under ACC control. control of the vehicle while under ACC control.

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TWO MODES OF OPERATIONTWO MODES OF OPERATION

ACC SPEED ACC SPEED CONTROL MODECONTROL MODE

During this mode there is During this mode there is no vehicle present within no vehicle present within the time gap or clearance the time gap or clearance of the system.of the system.

Set speed is maintained.Set speed is maintained. The engine control The engine control

system controls the system controls the engine output via throttle engine output via throttle control to maintain the control to maintain the vehicle speed at the vehicle speed at the target speed target speed

ACC TIME GAP ACC TIME GAP CONTROL MODECONTROL MODE

The ACC system enter The ACC system enter into this mode if the radar into this mode if the radar detects a forward vehicle detects a forward vehicle at or within the clearance at or within the clearance distance.distance.

Set distance is maintainedSet distance is maintained The ACC system sends a The ACC system sends a

target speed to the Engine target speed to the Engine Control Module and Control Module and deceleration commands to deceleration commands to the Brake Control Module.the Brake Control Module.

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HOW ACC WORKS?HOW ACC WORKS?

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Radar-based Adaptive Cruise Radar-based Adaptive Cruise ControlControl

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APPLICATIONSAPPLICATIONS

COLLISION WARNINGCOLLISION WARNING PARKING ASSISTANCEPARKING ASSISTANCE LANE ASSISTANCELANE ASSISTANCE

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COLLISION WARNINGCOLLISION WARNING

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Warning issued at different levels

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Accidents avoided due to the use of radar and image analysis

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Give assistance while taking curved paths

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Details of the forward vehicle obtained via Inter-Vehicle Communication System

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Self-parking systems have different ways of sensing the objects around the car.

The sensors transmit signals to detect objects.

The car thus detects the other parked cars, the size of the parking space and the distance to the curb, then steers it into the space.

PARKING ASSISTANCE

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Screen mounted on the dashboard gives the driver notifications such whento stop, when to shift into reverse, and when to slowly ease off the braketo move the car into the parking spot

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LANE ASSISTANCE

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Gives warning when the vehicle moves out of lane

<<video

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CONCLUSIONCONCLUSION

Reduces the rate of accidents

Reduces driver fatigue

Increases fuel efficiency due to gradual increase and decrease in traffic speed

Cost of the system is slowly decreasing

<<VIDEO>>

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REFERENCEREFERENCE Petros Ioannou; Cheng-Chih Chien. “Petros Ioannou; Cheng-Chih Chien. “Autonomous Intelligent Cruise Autonomous Intelligent Cruise

ControlControl””. IEEE Trans. On Vehicular Technology, 42(4):657-672, 1993.. IEEE Trans. On Vehicular Technology, 42(4):657-672, 1993.

Willie D. Jones, “Keeping cars from crashing.” , IEEE Spectrum September 2001.Willie D. Jones, “Keeping cars from crashing.” , IEEE Spectrum September 2001.

P.Venhovens, K. Naab and B. Adiprasto, “Stop And Go Cruise Control”, International P.Venhovens, K. Naab and B. Adiprasto, “Stop And Go Cruise Control”, International Journal of Automotive Technology, Vol.1, No.2, 2000. Journal of Automotive Technology, Vol.1, No.2, 2000.

Martin D. Adams, “Co axial range Measurement-Current trends for Mobile robotic Martin D. Adams, “Co axial range Measurement-Current trends for Mobile robotic Applications”, IEEE Sensors journal, Vol.2, no.1 Feb.2002.Applications”, IEEE Sensors journal, Vol.2, no.1 Feb.2002.

Merril I.Skolnik, “Introduction To RADAR Systems.”Tata Mc Grawhill edition 2001. Merril I.Skolnik, “Introduction To RADAR Systems.”Tata Mc Grawhill edition 2001.

http:// www.motorola .semiconductor. comhttp:// www.motorola .semiconductor. com

http://www.world.honda.comhttp://www.world.honda.com

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THANK YOUTHANK YOU