US 11,932,222 B2
Systems and methods for low speed braking operation
Marc Georgin, Dayton, OH (US); Phillip E. Cooley, Kettering, OH (US); and Michael Abbott, Tempe, AZ (US)
Assigned to GOODRICH CORPORATION, Charlotte, NC (US)
Filed by GOODRICH CORPORATION, Charlotte, NC (US)
Filed on Sep. 4, 2020, as Appl. No. 17/013,075.
Prior Publication US 2022/0073040 A1, Mar. 10, 2022
Int. Cl. B60T 8/17 (2006.01); B60T 7/04 (2006.01); B60T 7/06 (2006.01); B60T 8/171 (2006.01); B60T 8/32 (2006.01)
CPC B60T 8/1703 (2013.01) [B60T 7/042 (2013.01); B60T 7/06 (2013.01); B60T 8/171 (2013.01); B60T 8/325 (2013.01); B60T 8/326 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A brake control system, comprising:
an accelerometer coupled to an axle;
a servo valve configured to receive a hydraulic fluid and provide the hydraulic fluid to apply a braking force to a wheel via a hydraulic line; and
a brake control unit in electronic communication with the servo valve;
wherein the brake control unit is configured to:
receive an axle acceleration signal indicative of at least one of an axle acceleration or an axle deceleration from the accelerometer;
determine whether an aircraft speed is less than a threshold speed value;
monitor acceleration oscillations by determining whether the axle acceleration is greater than a threshold acceleration value, in response to the aircraft speed being less than the threshold speed value, and determining whether the axle deceleration is greater than the threshold acceleration value, in response to the aircraft speed being less than the threshold speed value; and
decrease a braking command pressure in response to the axle acceleration and the axle deceleration being greater than the threshold acceleration value, wherein the braking force applied to the wheel is reduced in response to the brake control unit decreasing the braking command pressure.