Locked wheel annunciation during emergency braking

Patent metadata

Field	Value
Publication number	US-10358121-B2
Application number	US-201715730584-A
Country	US
Kind code	B2
Filing date	Oct 11, 2017
Priority date	Oct 11, 2017
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

An emergency braking monitoring system includes a wheel assembly having a first wheel, an emergency braking monitoring unit coupled to the wheel assembly, and a locked wheel annunciation center coupled to the emergency braking monitoring unit for annunciation purposes. The emergency braking monitoring unit generates a fault annunciation signal based on a determination as to whether a first wheel speed value originating from the first wheel of the wheel assembly is a predetermined amount less than a reference value for a persistence time.

First claim

What is claimed is:

1. An emergency braking monitoring system, comprising:
a wheel assembly having a first wheel;
an emergency braking monitoring unit coupled to said wheel assembly; and
a locked wheel annunciation center coupled to said emergency braking monitoring unit for annunciation purposes, wherein said emergency braking monitoring unit generates a fault annunciation signal based on a determination as to whether a first wheel speed value originating from said first wheel of said wheel assembly is a predetermined amount less than a reference value for a persistence time.

2. The emergency braking monitoring system of claim 1 , wherein said reference value is at least one of a second wheel speed value, a third wheel speed value, a fourth wheel speed value, and an aircraft speed.

3. The emergency braking monitoring system of claim 1 , wherein said persistence time is a duration of time for which a fault occurs.

4. The emergency braking monitoring system of claim 1 , wherein said fault annunciation signal is provided to said locked wheel annunciation center coupled to said emergency braking monitoring unit.

5. The emergency braking monitoring system of claim 4 , wherein said locked wheel annunciation center makes an annunciation based on said fault annunciation signal.

6. The emergency braking monitoring system of claim 5 , wherein said annunciation includes at least one of a notice that a skid is likely to occur, a locked-wheel is likely to occur, a tire blowout is likely to occur, said predetermined amount, and said persistence time.

7. The emergency braking monitoring system of claim 5 , wherein said annunciation occurs during a manual emergency braking event.

8. The emergency braking monitoring system of claim 1 , wherein at least one of said persistence time and said predetermined amount is retrieved from at least one of a lookup-table, database, and flat-file.

9. The emergency braking monitoring system of claim 2 , wherein said wheel assembly includes a first wheel speed monitor coupled to said first wheel to ascertain said first wheel speed value.

10. The emergency braking monitoring system of claim 9 , wherein said wheel assembly includes a second wheel speed monitor coupled to a second wheel to ascertain said second wheel speed value, a third wheel speed monitor coupled to a third wheel to ascertain said third wheel speed value, and a fourth wheel speed monitor coupled to a fourth wheel to ascertain said fourth wheel speed value.

11. An emergency braking monitoring system, comprising:
a first wheel speed monitor coupled to a first wheel to ascertain a first wheel speed value;
a second wheel speed monitor coupled to a second wheel to ascertain a second wheel speed value;
an emergency braking monitoring unit coupled to said first wheel speed monitor and said second wheel speed monitor, wherein said emergency braking monitoring unit makes a determination as to whether a speed differential between said first wheel speed value and said second wheel speed value or an aircraft speed exceeds or is equal to a threshold value for a persistence time and generates an annunciation based on said determination.

12. The emergency braking monitoring system of claim 11 , wherein said persistence time is a duration of time for which a fault occurs.

13. The emergency braking monitoring system of claim 11 , wherein said annunciation is provided by a locked wheel annunciation center.

14. The emergency braking monitoring system of claim 11 , wherein said annunciation includes at least one of a notice that a skid is likely to occur, a locked-wheel is likely to occur, a tire blowout is likely to occur, said threshold value, and said persistence time.

15. The emergency braking monitoring system of claim 11 , wherein said threshold value is retrieved from at least one of a lookup-table, database, or flat-file.

16. The emergency braking monitoring system of claim 11 , wherein said annunciation occurs during a manual emergency braking.

17. A method of annunciating during an emergency braking, comprising:
retrieving, by an emergency braking monitoring unit, a persistence time and a predetermined amount;
ascertaining, by said emergency braking monitoring unit, a first wheel speed value of a first wheel using a first wheel speed monitor;
ascertaining, by said emergency braking monitoring unit, a reference value that is at least one of a second wheel speed value of a second wheel using a second wheel speed monitor or an aircraft speed;
determining, by said emergency braking monitoring unit, whether said first wheel speed value is said predetermined amount less than said reference value for said persistence time; and
providing, by said emergency braking monitoring unit, an annunciation based on said determining whether said first wheel speed value is said predetermined amount less than said reference value for said persistence time.

18. The method of claim 17 , wherein said annunciation provides feedback via a locked wheel annunciation center to determine whether an amount of braking requested exceeds a brake threshold.

19. The method of claim 18 , wherein said annunciation, during a manual emergency braking event, provides a notification to reduce an amount of emergency braking applied to at least one of said first wheel, said second wheel, a third wheel, and a fourth wheel.

20. The method of claim 17 , wherein said annunciation includes at least one of a notice that a skid is likely to occur, a notice that a tire blowout is likely to occur, said predetermined amount, and said persistence time.

Assignees

• Goodrich Corp

Inventors

• Zell Brian Keith

Classifications

• B60T2240/00

  Monitoring, detecting wheel/tyre behaviour; counteracting thereof · CPC title

• B60T2270/402

  Back-up · CPC title

• B60T8/88 Primary

  with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means · CPC title

• B60T8/325

  Systems specially adapted for aircraft · CPC title

• B60T8/1703 Primary

  for aircrafts · CPC title