Transcript BMCA 4663 - Dr. K. Hudha's Whiteboard

BMCA 4663
AUTOTRONICS
(VEHICLE CONTROL SYSTEM)
Lecture: Dr. Khisbullah Hudha
Tutorial: En. Mohd. Hanif Harun
Course Content
• Chapter 1: Introduction to Vehicle Control System (1)
• Chapter 2: Active Front Wheel Steer System (AFS) (1)
Chapter 3: Antilock Braking System (ABS) & MR Brake (2)
• Chapter 4: CVT Control (1)
• Chapter 5: Active Four Wheel Steer System (4WS) (1)
• Chapter 6: Active & Semi Active Suspension System (2)
• Chapter 7: Active Roll Control Suspension System (ARC) (2)
• Chapter 8: Active Engine Mounting System (1)
• Chapter 9: Adaptive Cruise Control (ACC) (1)
• Chapter 10: Vehicle to Vehicle (V2V) Communication (1)
Laboratory Works
• Sensor Installation & Control Command
Programming
• Pneumatically Actuated Active Suspension
System on a Quarter Car Test Rig
• Modeling and Validation of MR Brake
System
COURSE IMPLEMENTATION
• LECTURE: 2 HOURS PER WEEK FOR 14 WEEKS
• TUTORIALS: 3 HOURS PER WEEK FOR 8 WEEKS
• LAB: 3 HOURS PER WEEK FOR 3 WEEKS
• ASSIGNMENTS: 3 HOURS PER WEEK FOR 3 WEEKS
COURSE EVALUATION
•
•
•
•
•
MID TEST: 15%
FINAL TEST: 50%
QUIZ (2X): 10%
ASSIGNMENTS (3X): 10%
PROJECT: 15%
REFERENCES
• RAJAMANI, R. (2005). VEHICLE DYNAMICS AND
CONTROL. SPRINGER.
(can be downloaded at the following URL:
http://enlightenments.wordpress.com/2009/01/05/automotive-control-system/)
• Kiencke, U. and Nielsen, L. (2004). Automotive Control
System. Springer Verlag: New York, LLC.
Chapter 1
Introduction to Vehicle Control
System
AUTOMOTIVE TECHNOLOGY ROADMAP
ABS
• ABS is an acronym for anti-lock braking system. First
developed and patented in 1936, ABS is actually derived
from the German term "antiblockiersystem."
• Anti-lock brakes are designed to prevent skidding and
help drivers maintain steering control during an
emergency stopping situation.
• In cars equipped with conventional brakes, the driver
pumps the brakes, whereas in cars equipped with fourwheel ABS, the driver keeps a firm foot on the brake,
allowing the system to rapidly and automatically pump
the brakes.
Traction Control
• Traction Control is used to prevent the drive
wheels from losing grip when accelerating.
• Traction control is an enhancement of ABS that
can also be used to balance the traction torques
in all drive wheels
What is the difference between
ABS & Traction Control?
• ABS
manage the grip of the tires for braking
maneuver
• Traction Control
manage the grip of the tires for
accelerating maneuver
Vehicle Stability Control (VSC)
• VSC = ABS + Traction Control + Yaw
Control
• VSC is able to prevent a car from sliding
sideways
Brake Assist
• Brake Assist is a generic term for an automobile
braking technology that increases braking pressure in an
emergency situation.
• The brake assist system identify the state of ‘emergency’
of a road vehicle by using brake pedal force.
ARC
• Vehicles lean when cornering due to the weight
transfer imposed by lateral acceleration acting
on the suspension. Factors contributing to the
roll angle of the vehicle include vehicle height
and suspension stiffness.
• ARC system uses hydraulic/pneumatic and
electronic technology to reduce or eliminate the
vehicle roll angle in cornering, which improves
handling. This improvement to vehicle handling
can help reduce rollover risk.
ARC System
Adaptive Cruise Control
Adaptive Cruise Control (ACC) technology
automatically adjust the vehicle speed and distance
to that of a target vehicle. ACC uses a long range
radar sensor to detect a target vehicle up to 200
meters in front and automatically adjusts the ACC
vehicle speed and gap accordingly.
ACC automatically decelerates or accelerates the
vehicle according to the desired speed and distance
settings established by the driver. As per standard
cruise control the driver can override the system at
any time.
Active Body Control
• Active Suspension
- Hydraulic
- Pneumatic
• Semi-Active Suspension
- Variable orifice
- MR fluid
X-by Wire
• X-by wire: replace mechanical system in
automobile with electrical system for faster
response, easier to control and lighter
vehicle total weight
• The most common x-by-wire technology
available in the market are brake by wire &
steer by wire
Collision Avoidance Technology
• All the automotive technologies mentioned
previously are considered as collision
avoidance technologies
• Ongoing / Latest research on collision
avoidance:
Active bumper system, active hood lift
system, vehicle to vehicle communication,
etc.