CN-110282149-B - Device and method for determining the temperature characteristics of an aircraft landing gear

Abstract

An apparatus and method for determining a temperature characteristic at a first location on a wheel or brake assembly of an aircraft landing gear is disclosed. The temperature characteristic at the first location is determined using relationship information based on a first temperature at a second location of the wheel or brake assembly of the landing gear, the relationship information representing a relationship between the temperature characteristic at the first location and the first temperature. The invention also discloses a method for determining the relation information.

Inventors

• Rodrigo Himenis
• Brice Shelley
• Maud Konsola

Assignees

• 空中客车营运有限公司
• 空中客车运营简化股份公司
• 空中客车简化股份公司

Dates

Publication Date

20260512

Application Date

20190319

Priority Date

20180319

Claims (19)

1. 1. An apparatus for determining a temperature characteristic at a first location on a wheel or brake assembly of an aircraft landing gear, the apparatus comprising: A processor configured to: Such that the temperature characteristic at the first location on the wheel or brake assembly of the aircraft landing gear during one or more braking events or braking cycles is determined using relationship information based on a first temperature acquired at a second location on the wheel or brake assembly of the aircraft landing gear, the relationship information representing a relationship between the temperature characteristic at the first location and the first temperature, wherein, The temperature characteristic includes a determined second temperature at the first location; the relationship information includes an indication of a relationship between the temperature at the first location and the temperature at the second location, and The temperature characteristic further includes: A determined temperature increase beyond the first temperature that the second position can withstand without causing the temperature at the first position to reach a predetermined temperature threshold, or a determined amount of energy other than absorbed energy corresponding to the first temperature that the brake assembly can absorb during a current braking cycle without causing the temperature at the first position to reach a predetermined temperature threshold.
2. 2. The apparatus of claim 1, wherein, The first position is a position of a fuse plug of the wheel of the aircraft landing gear and the second position is a position of a brake disc of the brake assembly of the aircraft landing gear.
3. 3. The apparatus of claim 1 or claim 2, wherein the processor is further configured to determine a number of good brake applications that can occur in a remaining portion of a current brake cycle based on the determined temperature increase and a predetermined temperature increase corresponding to one or more brake applications.
4. 4. The apparatus of claim 1 or claim 2, wherein the determined amount of energy that the brake assembly is able to absorb is determined using a physical property of the brake assembly.
5. 5. The apparatus of claim 1 or claim 2, wherein the processor is further configured to determine a number of good brake applications that can occur in a remaining portion of a current brake cycle based on the determined energy value and a predetermined energy value corresponding to one or more brake applications.
6. 6. The apparatus of claim 1, wherein, The temperature characteristic further includes a determined time delay between the occurrence of the first temperature at the second location and the occurrence of the second temperature at the first location, and The relationship information includes an indication of a relationship between the determined time delay and the first temperature.
7. 7. The apparatus of claim 6, wherein, The temperature characteristic further includes determined temperature variation information of the temperature at the first location; The relationship information includes an indication of a relationship between the determined temperature change information and the first temperature, and The processor is further configured to determine a temperature distribution of the first location with respect to time based on the temperature characteristic and an ambient temperature.
8. 8. The apparatus of claim 7, wherein the determined temperature change information includes a heating time constant and a cooling time constant.
9. 9. The apparatus of claim 7 or claim 8, wherein the processor is further configured to determine a cooling time for the temperature at the first location to drop below a reference temperature limit based on the temperature profile.
10. 10. The apparatus of claim 1 or claim 2, wherein the processor is further configured to provide an indication based on the temperature characteristic at the first location.
11. 11. The apparatus of claim 1 or claim 2, wherein the processor is further configured to recalculate the temperature characteristic after a braking event occurs subsequent to the first temperature.
12. 12. A method for determining a temperature characteristic at a first location on a wheel or brake assembly of an aircraft landing gear, the method comprising: Inputting a first temperature at a second position of the wheel or the brake assembly of the aircraft landing gear, and Determining a temperature characteristic at the first location on a wheel or brake assembly of the aircraft landing gear during one or more braking events or braking cycles using relationship information based on the first temperature, the relationship information representing a relationship between the temperature characteristic at the first location and the first temperature, wherein, The temperature characteristic includes a determined second temperature at the first location; the relationship information includes an indication of a relationship between the temperature at the first location and the temperature at the second location, and The temperature characteristic further includes: A determined temperature increase beyond the first temperature that the second position can withstand without causing the temperature at the first position to reach a temperature threshold, or a determined amount of energy other than absorbed energy corresponding to the first temperature that the brake assembly can absorb during a current braking cycle without causing the temperature at the first position to reach a temperature threshold.
13. 13. The method of claim 12, comprising determining a number of good brake applications that can occur in a remaining portion of a current brake cycle based on the determined temperature increase and a predetermined temperature increase corresponding to one or more brake applications.
14. 14. The method of claim 12, wherein the determined amount of energy that the brake assembly is able to absorb is determined using a physical property of the brake assembly.
15. 15. A method according to claim 12 or claim 14, comprising determining a number of good brake applications that can occur in the remainder of a current brake cycle based on the determined energy value and a predetermined energy value corresponding to one or more brake applications.
16. 16. The method according to any one of claims 12 to 14, wherein, The temperature characteristic further includes a determined time delay between the occurrence of the first temperature at the second location and the occurrence of the second temperature at the first location, and The relationship information also includes an indication of a relationship between the determined time delay and the first temperature.
17. 17. The method of claim 16, wherein, The temperature characteristic further includes determined temperature variation information of the temperature at the first location; The relationship information further includes an indication of a relationship between the determined temperature change information and the first temperature, and The method includes determining a temperature distribution of the first location with respect to time based on the temperature characteristic and an ambient temperature.
18. 18. The method of claim 17, comprising determining a cooling time for the temperature at the first location to drop below a reference temperature limit based on the temperature distribution.
19. 19. A method according to any one of claims 12 to 14, comprising recalculating the temperature characteristics after a braking event occurs subsequent to inputting the first temperature.

Description

Device and method for determining the temperature characteristics of an aircraft landing gear Technical Field The invention relates to determining a temperature characteristic (temperature characteristic) at a specific location of an aircraft landing gear (AIRCRAFT LANDING GEAR). In particular, but not exclusively, the position may be the position of a wheel or brake assembly of an aircraft landing gear. Background The wheels of the aircraft landing gear may be provided with a fuse plug. A fusible plug is a safety device that can be used in a closed cavity to release pressure when high temperatures are reached. Aircraft wheels may have a fuse to mitigate the effects of very high gas pressures caused by the high temperatures inside the wheels' tires. Disclosure of Invention A first aspect of the invention provides an apparatus for determining a temperature characteristic at a first location on a wheel or brake assembly of an aircraft landing gear, the apparatus comprising a processor configured to determine the temperature characteristic at the first location using relationship information (relationship information) based on a first temperature at a second location of the wheel or brake assembly of the aircraft landing gear, the relationship information representing a relationship between the temperature characteristic at the first location and the first temperature. Optionally, the first position is a position of a fuse of a wheel of the aircraft landing gear and the second position is a position of a brake disc of a brake assembly of the aircraft landing gear. Optionally, the temperature characteristic comprises a determination of a second temperature at the first location, and the relationship information comprises an indication of a relationship between the temperature at the first location and the temperature at the second location. Optionally, the temperature characteristic comprises a determined temperature increase beyond the first temperature that the second location can withstand without causing the temperature at the first location to reach a predetermined temperature threshold. Optionally, the processor is configured to determine a number of good brake applications (good braking application) that can occur in a remaining portion of the current brake cycle based on the determining the temperature increase and a predetermined temperature increase corresponding to the one or more brake applications. Optionally, the temperature characteristic includes a determined amount of energy, determined using a physical property of the brake assembly, other than the absorbed energy corresponding to the first temperature that the brake assembly may absorb without causing the temperature at the first location to reach a temperature threshold. Optionally, the processor is configured to determine the number of good brake applications that can occur in the remainder of the current brake cycle based on the determined energy value and a predetermined energy value corresponding to one or more brake applications. Optionally, the temperature characteristic comprises a determined time delay between the occurrence of the first temperature at the second location and the occurrence of the second temperature at the first location, and the relationship information comprises an indication of a relationship between the determined time delay and the first temperature. Optionally, the temperature characteristic comprises determined temperature variation information of the temperature at the first location, the relationship information comprises an indication of a relationship between the determined temperature variation information and the first temperature, and the processor is configured to determine a temperature distribution of the first location with respect to time based on the temperature characteristic and the ambient temperature. Optionally, determining the temperature change information includes a heating time constant and a cooling time constant. Optionally, the processor is configured to determine a cooling time for the temperature at the first location to drop below a reference temperature limit based on the temperature profile. Optionally, the processor is configured to provide the indication based on a temperature characteristic at the first location. Optionally, the processor is configured to recalculate the temperature characteristic after a braking event occurs subsequent to the first temperature. A second aspect of the invention provides a method for determining a temperature characteristic at a first location on a wheel or brake assembly of an aircraft landing gear, the method comprising inputting a first temperature at a second location of the wheel or brake assembly of the aircraft landing gear, and determining the temperature characteristic at the first location using relationship information based on the first temperature, the relationship information representing a relationship between the temperature char