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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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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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Research of Fault Diagnosis of Planetary Gearbox based on EMD-SVD and PNN
Jixie chuandong, 2018 In order to solve the difficulty in fault feature extraction of the planetary gearbox vibration signal,a comprehensive fault diagnosis method based on empirical mode decomposition（ EMD）,singularity value decomposition（ SVD） and probabilistic neural ...
Zhang An’an +3 more
doaj
Jixie chuandong, 2012 The mixer gearbox is the central to parts of the rubber industry mixer and the performance directly determines the rubber mixing effect.The original parameters,structure,layout of gearbox,design of gear and planetary gear,lubrication,sealing,and so on of
王德海, 夏志民
doaj
An overview of advancements in helicopter transmission design [PDF]
, 1983 Development of a high temperature operating helicopter gearbox is ...
Mancini, J. H.
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Drive train dynamic analysis [PDF]
A method for parametric variations in drive train dynamic analysis is described. The method models the individual components of a drive system, forms the appropriate system interface coordinates and, calculates the system dynamic response at particular ...
Giansante, N.
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Planetary Gearbox Design and Development using Additive Manufacturing
An-Najah University Journal for Research - A (Natural Sciences)Modern manufacturing technology is dominated by additive manufacturing due to its simplicity, precision, time and material savings, and flexibility in design. The purpose of this study is to propose and print a 3D model of planetary gear trains since these gear trains are more efficient than conventional gear trains and have many advantages.
Mohammed Amer +7 more
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An analytical method to predict efficiency of aircraft gearboxes [PDF]
A spur gear efficiency prediction method previously developed by the authors was extended to include power loss of planetary gearsets. A friction coefficient model was developed for MIL-L-7808 oil based on disc machine data. This combined with the recent
Anderson, N. E. +2 more
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Space shuttle rudder/speedbrake actuation subsystem [PDF]
, 1985 The Rudder/Speedbrake (R/SB) Actuation Subsystem for use on the NASA Space Shuttle Orbiter is an electro-hydro-mechanical system which provides the control and positionary capability of the orbiter aero-dynamic primary flight control surface.
Naber, R. A.
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Modern methods of synthesis of automatic planetary gearboxes
Izvestiya MGTU MAMI, 2017 An increase in the number of gears in automotive transmissions is the most efficient way to reduce fuel consumption and improve the efficiency of automotive vehicles equipped with internal combustion engines. The more gears in the gearbox, the more complicated become the used mechanisms and their number increases as well.
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