US 11,939,875 B2
Gas turbine engine drive system health monitor
Sheridon Everette Haye, Mansfield, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Mar. 23, 2022, as Appl. No. 17/702,099.
Application 17/702,099 is a continuation of application No. 16/812,644, filed on Mar. 9, 2020, granted, now 11,293,301.
Application 16/812,644 is a continuation of application No. 15/788,020, filed on Oct. 19, 2017, granted, now 10,590,796, issued on Mar. 17, 2020.
Prior Publication US 2022/0213804 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01M 15/14 (2006.01); F01D 5/06 (2006.01); F01D 21/00 (2006.01); F02C 7/00 (2006.01); F02C 7/36 (2006.01); F02K 3/06 (2006.01); G01H 1/00 (2006.01); G01H 1/10 (2006.01); F02C 3/04 (2006.01)
CPC F01D 21/003 (2013.01) [F01D 5/06 (2013.01); F02C 7/00 (2013.01); F02C 7/36 (2013.01); F02K 3/06 (2013.01); G01H 1/003 (2013.01); G01H 1/10 (2013.01); G01M 15/14 (2013.01); F02C 3/04 (2013.01); F05D 2220/32 (2013.01); F05D 2240/60 (2013.01); F05D 2260/4031 (2013.01); F05D 2260/80 (2013.01); F05D 2270/304 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A drive system of a gas turbine engine, the drive system comprising:
a first drive shaft and a second drive shaft operable to rotate within 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;
a drive gear system coupled to the first drive shaft and the second drive shaft; and
a processing system coupled to the first sensor and the second sensor, the processing system operable to:
determine a timing variation based on output of the first sensor and output of the second sensor;
determine a torsional deflection between the first drive shaft and the second drive shaft based on the timing variation; and
detect a health status of the drive system based on the torsional deflection, wherein the health status identifies whether a fault condition of the drive gear system is detected based on the torsional deflection.