GAS TURBINE ENGINE DRIVE SYSTEM HEALTH MONITORING SYSTEM AND METHOD

摘要

A drive system (100) of a gas turbine engine (20) includes at least one drive shaft (102a, 102b) operable to rotate within the gas turbine engine, a phonic wheel (106a, 106b) coupled to the at least one drive shaft (102a, 102b), a speed sensor (108a, 108b) operable to detect rotation of the phonic wheel (106a, 106b) indicative of rotation of the at least one drive shaft (102a, 102b), and a processing system (112) coupled to the speed sensor (108a, 108b). The processing system (112) is operable to detect a phonic wheel pulse train (402, 404) indicative of rotation of the at least one drive shaft (102a, 102b) via the speed sensor (108a, 108b), determine a torsional mode of the at least one drive shaft (102a, 102b) based on the phonic wheel pulse train (402, 404), and record one or more trends of the torsional mode indicative of a health status of the drive system (100). Corresponding gas turbine engine with such a drive system and method of monitoring a drive system in a gas turbine engine are also provided.