Patent ID: 11905033
Assignee: GOODRICH CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 14:
15. An article of manufacture including a tangible, non-transitory computer-readable storage medium having instructions stored thereon that, in response to execution by a processor, cause the processor to perform operations comprising:
receiving, via the processor, a stroke profile as a function of time for a shock strut;
receiving, via the processor, a gas pressure measurement in a gas chamber of the shock strut;
receiving, via the processor, a wheel speed measurement of a tire in a landing gear assembly;
receiving, via the processor, a gas temperature measurement of the shock strut;
calculating, by the processor, a vertical load on a landing gear structure based on the stroke profile, the gas pressure measurement, and the gas temperature measurement;
calculating, via the processor, an axle drag load as a function of time based on the stroke profile of the shock strut, based on the gas pressure measurement, and based on the wheel speed measurement, wherein the calculating includes deriving the axle drag load as a function of time at least partially from the wheel speed measurement;
comparing, via the processor, the axle drag load as a function of time and the vertical load as a function of time to a predetermined envelope of axle drag loads and vertical loads to determine whether a landing event is hard; and
in response to at least one of the axle drag load and the vertical load is outside the predetermined envelope of axle drag loads and vertical loads, determining the landing event is hard.