Brake load balance and runway centering techniques

• US 10,300,897 B2
• Filed: 05/15/2017
• Issued: 05/28/2019
• Est. Priority Date: 05/15/2017
• Status: Active Grant

• Current Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Georgin, Marc, Ayichew, Efrem E.
• Primary Examiner(s): Badii, Behrang
• Assistant Examiner(s): Testardi, David A
• Application Number:
  US15/595,573
• Publication Number:
  US 20180326955A1
• Time in Patent Office: 743 Days
• CPC Class Codes: B60T 2201/03 Brake assistants
• CPC Class Codes: B60T 2230/02 Side slip angle, attitude angle, floating angle, drift angle
• CPC Class Codes: B60T 2250/03 Vehicle yaw rate
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00
• CPC Class Codes: B60T 8/1701 Braking or traction control means specially adapted for particular types of vehicles for vehicles having more than one drive axle B60T8/1769
• CPC Class Codes: B60T 8/1703 for aircrafts
• CPC Class Codes: B60T 8/17555 specially adapted for enhancing driver or passenger comfort, e.g. soft intervention or pre-actuation strategies
• CPC Class Codes: B60T 8/1761 responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
• CPC Class Codes: B60T 8/17613 based on analogue circuits or digital circuits comprised of discrete electronic elements
• CPC Class Codes: B60T 8/24 responsive to vehicle inclination or change of direction, e.g. negotiating bends using electrical circuitry or regulation means B60T8/17
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 10/188 hydraulic brakes
• CPC Class Codes: B64C 25/426 Braking devices providing an automatic sequence of braking
• CPC Class Codes: B64C 25/48 differentially operated for steering purposes
• CPC Class Codes: G05D 1/0816 to ensure stability

Abstract

A method for controlling brakes may comprise receiving, by a controller, a yaw rate from an inertial sensor, calculating, by the controller, a force correction, calculating, by the controller, a pressure correction, and adjusting, by the controller, a pressure command for a brake control device.

Claims

1. A brake control system, comprising:

an inertial sensor coupled to an aircraft configured to measure a yaw acceleration of the aircraft;

a brake control unit (BCU) configured to receive the yaw acceleration from the inertial sensor, and control a brake control device based on the yaw acceleration,

wherein the BCU is configured to calculate a brake pressure correction using the yaw acceleration and equation

2. The brake control system of claim 1, wherein the BCU is configured to calculate a brake force correction for the brake control device based upon the yaw acceleration.

3. The brake control system of claim 2, wherein the BCU is configured to calculate the brake force correction based upon the yaw acceleration and configured to calculate a brake pressure correction for the brake control device based upon the brake force correction.

4. The brake control system of claim 1, further comprising a wheel speed sensor configured to measure a rotational speed of a wheel of the aircraft.

5. The brake control system of claim 4, wherein the BCU is configured to calculate a wheel deceleration based upon the rotational speed.

6. The brake control system of claim 5, wherein the BCU is configured to calculate a brake pressure correction based upon the wheel deceleration.

7. A method for controlling brakes, comprising:

receiving, by a brake control unit (BCU), a yaw acceleration from an inertial sensor; and

adjusting, by the BCU, a brake command for a brake control device based upon the yaw acceleration; and

calculating, by the BCU, a brake force correction based upon the yaw acceleration,

wherein the yaw acceleration is a yaw acceleration of an aircraft, and

the brake force correction is calculated using at least one of equation

8. The method of claim 7, wherein the brake force correction is calculated using at least one of equation

9. The method of claim 7, further comprising calculating, by the BCU, a brake pressure correction based upon the brake force correction, wherein the brake pressure correction is calculated using the brake force correction.

10. The method of claim 9, wherein the brake pressure correction is calculated using equation

11. The method of claim 7, further comprising sending, by the BCU, the adjusted brake command to the brake control device.

12. A method for controlling brakes, comprising:

receiving, by a brake control unit (BCU), a yaw acceleration from an inertial sensor; and

adjusting, by the BCU, a brake command for a brake control device based upon the yaw acceleration; and

calculating, by the BCU, a brake force correction based upon the yaw acceleration,

wherein the yaw acceleration is a yaw acceleration of an aircraft, and

the brake force correction is calculated using at least one of equation

13. The method of claim 12, further comprising calculating, by the BCU, a brake pressure correction based upon the brake force correction, wherein the brake pressure correction is calculated using the brake force correction.

14. The method of claim 13, wherein the brake pressure correction is calculated using equation