Brake load balance and runway centering techniques

Patent metadata

Field	Value
Publication number	US-10899325-B2
Application number	US-201916378227-A
Country	US
Kind code	B2
Filing date	Apr 8, 2019
Priority date	May 15, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A method for controlling brakes includes receiving, by a controller, a first wheel speed from a first wheel speed sensor of a first wheel arrangement, receiving, by the controller, a second wheel speed from a second wheel speed sensor of a second wheel arrangement, calculating, by the controller, a pressure correction, and adjusting, by the controller, a pressure command for at least one of the first wheel arrangement and the second wheel arrangement.

First claim

What is claimed is:

1. A method for controlling brakes of an aircraft, comprising:
receiving, by a controller, a first wheel speed from a first wheel speed sensor of a first wheel arrangement, wherein the first wheel arrangement comprises a first brake of the aircraft, the first brake comprises a first brake stack;
receiving, by the controller, a second wheel speed from a second wheel speed sensor of a second wheel arrangement, wherein the second wheel arrangement comprises a second brake of the aircraft, the second brake comprises a second brake stack;
calculating, by the controller, a brake pressure correction based upon the first wheel speed and the second wheel speed; and
adjusting, by the controller, a brake pressure command for at least one of the first brake and the second brake;
wherein the brake pressure command is adjusted based upon the brake pressure correction;
the brake pressure correction is calculated for balancing a first tire drag force of the first wheel arrangement and a second tire drag force of the second wheel arrangement; and
the brake pressure correction is calculated using equation

Δ
⁢

⁢
P_j

=

±

I

wh
_x

⁡

(

ω
.

xr

-

ω
.

xj

)

A
·
k
·
n
·

R
b

·

μ
cc

,

wherein ΔP_j denotes the brake pressure correction, I wh _x denotes a rotational moment of inertia of at least one of the first wheel arrangement and the second wheel arrangement, {dot over (ω)} xr denotes a wheel deceleration of at least one of the first wheel arrangement and the second wheel arrangement, {dot over (ω)} xj denotes a wheel deceleration of the other of the first wheel arrangement and the second wheel arrangement, A denotes a piston area, k denotes a number of carbon friction surfaces, n denotes a number of brake stacks, R b denotes a brake force torque arm, and μ cc denotes a coefficient of friction.

2. The method of claim 1 , further comprising sending, by the controller, the adjusted brake pressure command to a brake control device of the second wheel arrangement.

3. The method of claim 2 , wherein the adjusted brake pressure command comprises the brake pressure command adjusted by the brake pressure correction.

4. The method of claim 1 , wherein the brake pressure command is adjusted by a value of the brake pressure correction.

Assignees

• Goodrich Corp

Inventors

• Georgin Marc
• Ayichew Efrem E

Classifications

• B60T2250/03

  Vehicle yaw rate · CPC title

• B60T8/24

  responsive to vehicle inclination or change of direction, e.g. negotiating bends {(using electrical circuitry or regulation means B60T8/17)} · CPC title

• B60T8/1703 Primary

  for aircrafts · CPC title

• B60T8/17613

  based on analogue circuits or digital circuits comprised of discrete electronic elements · CPC title

• B60T2201/03

  Brake assistants · CPC title