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Design, manufacture and spin test of high contact ratio helicopter transmission utilizing Self-Aligning Bearingless Planetary (SABP) [PDF]

open access: yes
A 450 hp high ratio Self-Aligning Bearingless Planetary (SABP) for a helicopter application was designed, manufactured, and spin tested under NASA contract NAS3-24539.
Folenta, Dezi, Lebo, William
core   +1 more source

Fault diagnosis of planetary gearboxes based on bispectral composite spectral features of torsional vibration modulation signals

open access: yesJixie chuandong
ObjectiveCompared with the linear vibration signal, the planetary wheel torsional vibration signal is not affected by the planetary wheel passing effect and the signal transmission path, and the spectral structure is simpler. Therefore, it is expected to
ZHANG Yibao   +3 more
doaj  

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