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TRANSCRIPT
Advanced Driver Assistance System
ADAS
Outline
• Introduction • Technology overview • Adaptive Cruise Control (ACC) • Forward Collision Warning (FCW) • Intelligent Speed Assistance (ISA) • Lane Departure & Lane Keeping
Warning (LDW & LKW) • Driving task analysis • Interaction diagram
Introduction
• Car electronics – Technology has improved – Car’s basic technology still the same – Example:
• Radio: entertainment purposes • GPS : navigation and guidance
– Summary • Information systems • Entertainment systems • Safety systems
Introduction
• ADAS: – Research focus on safety systems – Direct support interaction with the driver – Operate from inside the car and may
connect to external sources • Why ADAS
– Increase the traffic safety – Traffic efficiency – Improve sustainability of the vehicles
ADAS Technology Overview
• For convenience we will divide the technologies into subcategories: – Longitudinal – Lateral Support – Miscellaneous
ADAS Technology Overview
ADAS Technology Overview
ADAS Technology Overview
Adaptive Cruise Control (ACC)
ADAS System Analysis: ACC
Task Sub Tasks Stabilization Longitudinal Throttle Control
Brake Control Gear Control
Maneuvering External Traffic situation-vehicles Position-speed
Supporting Task
ADAS System Analysis: ACC
Main Function Sub Function Monitor & maintain longitudinal position
Scan road Detect vehicle Determine Vehicle speed Determine local speed Calculate braking time Calculate following distance
Interact with driver Provide output Acquire input
Intervene Apply brake Apply gear Apply throttle
Function Analysis
ADAS System Analysis: ACC
ADAS System Analysis: ACC
Function Component (s) Scanning Road Radar/ Camera/ Lidar Detect Vehicles Determine Vehicle Speed Calculate Braking Time Calculate Following Distance
Central Processing Unit Central Processing Unit Central Processing Unit Central Processing Unit
Input/output User Interface Apply Brake Apply Gear Apply Throttle
Engine and brake control system Engine and brake control system Engine and brake control system
Determine Local Speed Interface to speedmeter
System Components
Forward Collision Warning (FCW)
ADAS System Analysis: FCW
Task Sub Tasks Stabilization Longitudinal Throttle Control
Brake Control Gear Control
Maneuvering External Traffic situation-Obstacles
Supporting Task
ADAS System Analysis: FCW
Main Function Sub Function Monitor longitudinal safety Detect obstacles
Identify obstacles Interact with driver Provide output
Acquire input Intervene Apply brake
Apply gear Apply throttle
Function Analysis
ADAS System Analysis: FCW
ADAS System Analysis: FCW
Function Component (s) Detect obstacles Radar/ Camera Identify obstacles Graphics, Central Processing unit Input/output User Interface Apply Brake Apply Gear Apply Throttle
Engine and brake control system Engine and brake control system Engine and brake control system
System Components
Intelligent Speed Assistance (ISA)
ADAS System Analysis: ISA
Task Sub Tasks Stabilization Longitudinal Throttle Control
Brake Control Gear Control
Maneuvering External Position-speed Internal Vehicle status
Traffic rules (speed)
Supporting Task
ADAS System Analysis: ISA
Main Function Sub Function Monitor and maintain speed Determine current speed
Determine speed limit Interact with driver Provide output
Acquire input Intervene Apply brake
Apply gear Apply throttle
Function Analysis
ADAS System Analysis: ISA
Function Component (s) Determine current speed Car systems output (speedometer) Determine speed limit Communication devices, car-to-
infrastructure Input/output User Interface Apply Brake Apply Gear Apply Throttle
Engine and brake control system Engine and brake control system Engine and brake control system
System Components
Lane Departure & Lane Keeping Warning (LDW &
LKW)
ADAS System Analysis: LDW & LKW
Task Sub Tasks Stabilization Lateral Steering wheel
Brake control Maneuvering External Position – heading
Supporting Task
ADAS System Analysis: LDW & LKW
Main Function Sub Function Monitor and maintain lateral position Scan road
Detect road marking Predict path Detect deviations Calculate required corrections
Interact with driver Provide output Acquire input
Intervene Apply brake Apply steering wheel
Function Analysis
ADAS System Analysis: LDW & LKW
ADAS System Analysis: LDW & LKW
Function Component (s) Scanning road Camera, infra-red sensor, radar Detect road marking Predict path Determine deviations Calculate corrections
Central processing unit Central processing unit Central processing unit Central processing unit
Input/output User Interface Apply Brake Apply steering wheel
Engine and brake control system Engine and brake control system
System Components
Driving task analysis
– Stabilization • Longitudinal
– Throttle control – Brake control – Gear control
• Lateral – Steering wheel – Brake control
– Maneuvering
• Internal – Vehicle status – Traffic rules
• External – Traffic situation
» Vehicles » Obstacles » Pedestrians
– Road signs – Position
» Speed » Heading
– Navigation • Route planning • Route following
Interaction diagram
• Stabilization
Interaction diagram
• Maneuvering
Interaction diagram
• Navigation
Workload manager diagram
References & readings
• ADAS for the car of the future: ADAS interface design, J.P.Thalen, 2006, University of Twente.