Patent ID: 6132016
Filing Date: 2000-10-17
Classification: B60T

Abstract:
A method of detecting initial skidding and applying brake pressure for braking of a wheel of an aircraft during landing of the aircraft, the aircraft having a wheel brake for applying brake pressure to said wheel, the method comprising the steps of:sensing brake pressure when brake pressure is applied and generating brake pressure signals that are a function of the braking pressure applied to the wheel brake;comparing said brake pressure signals with a predetermined threshold brake pressure;generating wheel speed signals that are a function of the rotational speed of the wheel;generating a wheel velocity signal based upon said wheel speed signals;generating a reference velocity signal;comparing said wheel velocity signal with said reference velocity signal and generating wheel velocity error signals indicative of the difference between said wheel velocity signal and said reference velocity signal;providing a pressure bias modulator integrator for controlling a maximum allowable brake pressure responsive to said brake pressure signals and said wheel velocity error signals to provide an anti-skid control signal;initializing the pressure bias modulator integrator with the predetermined threshold brake pressure plus a predetermined constant pressure value, when the brake pressure reaches the predetermined threshold brake pressure; andgenerating a command brake pressure signal in response to a deceleration command and said anti-skid control signal.