According to the present invention, there is provided a method and system
for providing brake control, autobrake and antiskid brake functionality
by recognizing that the only difference between the three functions is
the amount of deceleration they allow. Unlike a conventional system where
the pedals represent brake pressure, the present invention interprets
pedal commands as desired deceleration. The method and system involve
controlling acceleration of a wheel reference speed and setting a desired
slip based on autobrake settings, pedal positions, and various
parameters. A proportional/integral/derivative algorithm controls wheel
speed and is monitored for normal operation. Abnormal operation generates
control parameters which are used to alter the wheel reference speed and
its deceleration. Additionally, vehicles using the invention will benefit
from improved yaw stability, even brake temperatures and differential
braking during antiskid operation.