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Helicopter gearbox failure spectra and their diagnostic symptoms

Pil'a J., Adamčik F., Labun J.

Zeszyty Naukowe / Wyższa Szkoła Oficerska Sił Powietrznych

2009

Nr 2

54--57

Traditionally helicopter gearbox failure analysis has been achieved in a number of ways, including the recording of the oil temperature and oil pressure of critical components within the transmission system. Vibration monitoring techniques provide a sufficient level of detail such that all drive train components can be monitored throughout flight. Each indicator relates to specific faults, such as shaft misalignment, gear tooth cracking, bearing inner-race damage, and lubrication problems.

Universal characteristic equations and qualitative conclusions about frequency spectra

Zoriy L.

Vibrations in Physical Systems

2000

Vol. 19

315--316