Results 111 to 120 of about 8,052 (227)
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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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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A robust fault detection method of rolling bearings using modulation signal bispectrum analysis [PDF]
, 2015 Envelope analysis is a widely used method for bearing fault detection. To obtain high detection accuracy, it is critical to select an optimal narrowband for envelope demodulation.
Abdalla, Gaballa +4 more
core
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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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 analytical method for designing low noise helicopter transmissions [PDF]
The development and experimental validation of a method for analytically modeling the noise mechanism in the helicopter geared power transmission systems is described. This method can be used within the design process to predict interior noise levels and
Bossler, R. B., Jr. +2 more
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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
openaire +1 more source
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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Fault Diagnosis of Planetary Gearbox Based on Adaptive Order Bispectrum Slice and Fault Characteristics Energy Ratio Analysis. [PDF]
Sensors (Basel), 2020 Shen Z, Shi Z, Zhen D, Zhang H, Gu F.
europepmc +1 more source