Results 71 to 80 of about 2,844 (216)
Spiral bevel and circular arc helical gears: Tooth contact analysis and the effect of misalignment on circular arc helical gears [PDF]
A computer aided method for tooth contact analysis was developed and applied. Optimal machine-tool settings for spiral bevel gears are proposed and when applied indicated that kinematic errors can be minimized while maintaining a desirable bearing ...
Coy, J. J. +4 more
core +1 more source
Design of a novel bimanual robotic system for single-port laparoscopy [PDF]
, 2010 —This paper presents the design and fabrication of Single-Port lapaRoscopy bImaNual roboT (SPRINT), a novel tele-operated robotic system for minimally invasive surgery.
C. Quaglia +6 more
core +1 more source
Identification and proposed control of helicopter transmission noise at the source [PDF]
Helicopter cabin interiors require noise treatment which is expensive and adds weight. The gears inside the main power transmission are major sources of cabin noise.
Coy, John J. +6 more
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Results of NASA/Army transmission research [PDF]
Since 1970 the NASA Lewis Research Center and the U.S. Army Aviation Systems Command have shared an interest in advancing the technology for helicopter propulsion systems. In particular, that portion of the program that applies to the drive train and its
Coe, Harold H. +2 more
core +1 more source
Mathematical models for the synthesis and optimization of spiral bevel gear tooth surfaces [PDF]
The geometry of spiral bevel gears and to their rational design are studied. The nonconjugate tooth surfaces of spiral bevel gears are, in theory, replaced (or approximated) by conjugated tooth surfaces.
Goldrich, R. N. +2 more
core +1 more source
Jixie chuandong, 2015 The drilling rig rotary table bevel gear is an important transmission device for the drive drilling rig.A precise parametric rotary table bevel gear model is established in Pro/E.By means of the data conversion to the interface file parasolid,a virtual ...
Huang Anyi +3 more
doaj
Bevel gearbox fault diagnosis using vibration measurements [PDF]
, 2016 The use of vibration measurementanalysis has been proven to be effective for gearbox fault diagnosis. However, the complexity of vibration signals observed from a gearbox makes it difficult to accurately detectfaults in the gearbox. This work is based on
Chandra +10 more
core +2 more sources
THE LOGARITHMIC SPIRAL AND ITS SPHERICAL COUNTERPART
Journal of Industrial Design and Engineering Graphics, 2020 Logarithmic spirals are isogonal trajectories of pencils of lines. From a series of geometric consequences, we pick out a few which are relevant for kinematics: When a logarithmic spiral rolls on a line, its asymptotic point traces a straight line. Hence,
Hellmuth Stachel +2 more
doaj +2 more sources
Mesh Stiffness and Dynamic Modeling and Analysis of Modified Straight Bevel Gears
Applied SciencesGear modification, which involves the removal of material from the theoretical surface to improve the contact characteristics of the gear face, is widely applied in gear vibration reduction and noise optimization design.
Ding Zhang +5 more
doaj +1 more source
Development of a full-scale transmission testing procedure to evaluate advanced lubricants [PDF]
Experimental tests were performed on the OH-58A helicopter main rotor transmission in the NASA Lewis 500-hp Helicopter Transmission Test Stand. The testing was part of a joint Navy/NASA/Army lubrication program.
Decker, Harry J. +2 more
core +1 more source