Patent ID: 11939875
Assignee: RTX CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 7:
8. A gas turbine engine comprising:
a drive system comprising:
a first drive shaft operable to drive a fan of the gas turbine engine; and
a second drive shaft operable to be driven by a turbine of the gas turbine engine;
a first sensor operable to detect rotation of the first drive shaft;
a second sensor operable to detect rotation of the second drive shaft; and
a processing system coupled to the first and second sensors, the processing system operable to:
identify an operating mode of the gas turbine engine, wherein a shaft frequency is used to identify the operating mode of the gas turbine engine;
determine a trend of a torsional mode of the drive system based on the operating mode of the gas turbine engine; and
detect a health status of the gas turbine engine based on the torsional mode.