Patent ID: 8229641

Claim:
Apparatus for controlling an aircraft braking system that comprises at least one first side braking means for braking a wheel positioned on a first side of a longitudinal axis of an aircraft and at least one second side braking means for braking a wheel positioned on a second side of the longitudinal axis, said apparatus comprising control means for processing respective indications of braking effect of the braking means and in response to the result of said processing issuing control signals for controlling braking forces applied by the braking means, said indications of braking effect being determined based on wheel speed of the respective wheel and an aircraft speed value obtained without reference to wheel speed, each indication of braking effect comprising a brake slip ratio calculated using the equation: brake ⁢ ⁢ slip ⁢ ⁢ ratio = air ⁢ ⁢ craft ⁢ ⁢ speed - wheel ⁢ ⁢ speed aircraft ⁢ ⁢ speed said control signals being calculated to equalize said brake slip ratios, thereby to cause the braking force applied on said first side of the longitudinal axis by said at least one first side braking means to balance the braking force applied on the second side of the longitudinal axis by said at least one second side braking means.