Results 101 to 110 of about 8,052 (227)
Planetary Gearbox Dynamic Modeling Considering Bearing Clearance and Sun Gear Tooth Crack. [PDF]
Sensors (Basel), 2021 Chen X, Chen X, Yang X, Zuo MJ, Tian Z.
europepmc +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.
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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.
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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
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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NASA helicopter transmission system technology program [PDF]
, 1983 The purpose of the NASA Helicopter Transmission System Technology Program is to improve specific mechanical components and the technology for combining these into advanced drive systems to make helicopters more viable and cost competitive for commerical ...
Zaretsky, E. V.
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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
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Transmission research activities at NASA Lewis Research Center [PDF]
A joint research program, to advance the technology of rotorcraft transmissions, consists of analytical and experimental efforts to achieve the overall goals of reducing transmission weight and noise, while increasing life and reliability.
Lewicki, D. G.
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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
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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
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