Overview of Anti-lock Brake System

1
Overview ofAnti-lock Brake System

• Jonathan Brown
• ABS 2
• Fall 2001

2
Anti-lock Brake System

• System maximizes the amount of brake pressure
  applied to wheels in sub-optimal conditions
• Motivation for ABS
• Prevents uncontrolled skidding
• Creates a safer automobile
• Originally used in aircraft

3
Overview of Features

• Controller receives wheel speed from independent
  sensors on each wheel
• Controller calculates acceleration on each wheel
• When rapid deceleration is detected, signals are
  sent to the actuators to modulate brake pressure

4
Domain Research

• Investigated anti-lock braking
• Needed to apply ABS knowledge to automotive
  domain
• ABS Constraints
• All input is from wheel speed sensors or the
  on-board computer
• Pressure is released in response to rapid
  deceleration
• The ABS performs a self-test during ignition and
  every time the brakes are applied