US 12,240,593 B2
Aircraft brake control system
Alexander Hayes, Bristol (GB); Ashley Bidmead, Bristol (GB); and Andrew Hebborn, Bristol (GB)
Assigned to AIRBUS OPERATIONS LIMITED, Bristol (GB)
Filed by AIRBUS OPERATIONS LIMITED, Bristol (GB)
Filed on Dec. 15, 2023, as Appl. No. 18/542,307.
Application 18/542,307 is a continuation of application No. 17/688,643, filed on Mar. 7, 2022, granted, now 11,878,789.
Claims priority of application No. 2103175 (GB), filed on Mar. 8, 2021.
Prior Publication US 2024/0140596 A1, May 2, 2024
Int. Cl. B64C 25/46 (2006.01); B60T 8/17 (2006.01); B64C 25/42 (2006.01)
CPC B64C 25/46 (2013.01) [B60T 8/1703 (2013.01); B64C 25/426 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aircraft brake control system for controlling antiskid braking of a wheel of an aircraft, the system comprising a control assembly having:
i) an input of an indication of an aircraft speed,
ii) an input of an indication of a wheel speed of the wheel,
iii) an input of an indication of a brake level,
iv) an input of an indication of a brake energy supply configuration,
v) an optimum slip ratio calculator for calculating an optimum slip ratio of the wheel, based at least partly on the indications of the wheel speed and the aircraft speed,
vi) a state determinator for determining a state of the wheel, including:
a “small skid” state where it is determined that the slip ratio of the wheel is lower than a slip limit above the optimum slip ratio,
vii) an antiskid brake calculator, for calculating an antiskid brake command based on the wheel speed, brake level and the determined state,
viii) a state mode controller which sets a mode of operation of the state determinator, the state mode controller configured to set:
a first state determinator mode, when the input of the indication of a brake energy supply configuration indicates a first brake energy supply being used, and in which a first slip limit value is used as the slip limit, and
a second state determinator mode, when the input of the indication of a brake energy supply configuration indicates a second brake energy supply being used, in which a second slip limit value is used as the slip limit, the second slip limit value being lower than the first slip limit value, and
iv) an output for indicating the antiskid brake command to be sent to a brake valve.