Results 101 to 110 of about 8,094 (226)
Advanced rotorcraft transmission program [PDF]
The Advanced Rotorcraft Transmission (ART) program is an Army-funded, joint Army/NASA program to develop and demonstrate lightweight, quiet, durable drivetrain systems for next generation rotorcraft.
Bill, Robert C.
core +1 more source
Vibration Separation Methodology Compensated by Time-Varying Transfer Function for Fault Diagnosis of Non-Hunting Tooth Planetary Gearbox. [PDF]
Sensors (Basel), 2022 Tong S, Li J, Cong F, Fu Z, Tong Z.
europepmc +1 more source
Design study of Self-Alining Bearingless Planetary (SABP) gear [PDF]
The feasibility of using the self alining, bearingless planetary (SABP) transmission in an uprated version of the OH-58 helicopter was evaluated, specific performance comparisons of this new transmission with contemporary helicopter transmission systems ...
Folenta, D. J.
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Jixie chuandong, 2013 A coupled dynamics model containing gears-shafts-bearings-housing of a high-power circulating pump planetary gearbox is built comprehensively in consideration of the time-varying mesh stiffness and gear error.
杨长辉 +3 more
doaj
A review of gear housing dynamics and acoustics literature [PDF]
A review of the available literature on gear housing vibration and noise reduction is presented. Analytical and experimental methodologies used for bearing dynamics, housing vibration and noise, mounts and suspensions, and the overall geared and housing ...
Lim, Teik Chin, Singh, Rajendra
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Advanced Rotorcraft Transmission (ART) program summary [PDF]
The Advanced Rotorcraft Transmission (ART) Program was initiated to advance the state of the art for rotorcraft transmissions. The goal of the ART Program was to develop and demonstrate the technologies needed to reduce transmission weight by 25 pct. and
Kish, J. G., Krantz, T. L.
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Efficiency Analysis of a Planetary Gearbox
, 2010 This Bachelor of Science thesis consists of an efficiency evaluation and creation of atheoretical model for an Atlas Copcos epicyclic gearbox. The thesis starts with atheoretical chapter containing the fundamentals of epicyclic gearing and the build of thespecific gearbox investigated.
Gustavsson Mårdestam, Peter +1 more
openaire +1 more source
Gear noise, vibration, and diagnostic studies at NASA Lewis Research Center [PDF]
The NASA Lewis Research Center and the U.S. Army Aviation Systems Command are involved in a joint research program to advance the technology of rotorcraft transmissions.
Coy, John J. +3 more
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Effect of operating conditions on gearbox noise [PDF]
, 1992 Low contact ratio spur gears were tested in the NASA gear noise rig to study the noise radiated from the top of the gearbox. The measured sound power from the gearbox top was obtained from a near field acoustic intensity scan taken at 63 nodes just above
Atherton, William +4 more
core +2 more sources
Modeling and Simulating the Efficiency of Gearboxes and of Planetary Gearboxes
, 2002 It is shown how to model and simulate frictional effects present in gearboxes and in planetary gearboxes. This includes modeling of gear wheel stucking and sliding due to Coulomb friction between the gear teeth leading to load torque dependent losses.
Pelchen, Christopher +2 more
openaire +1 more source