Velocity dependence of joint friction in robotic manipulators with gear transmissions [PDF]
This paper analyses the problem of modelling joint friction in robotic manipulators with gear transmissions at joint velocities varying from close to zero until their maximum appearing values.
Aarts, Ronald, Jonker, Ben, Waiboer, Rob
core +2 more sources
Forcing function control of Faraday wave instabilities in viscous shallow fluids
We investigate the relationship between the linear surface wave instabilities of a shallow viscous fluid layer and the shape of the periodic, parametric-forcing function (describing the vertical acceleration of the fluid container) that excites them.
A. Messiah +6 more
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Investigating the Effect of Water Contamination on Gearbox Lubrication based on Motor Control Data from a Sensorless Drive [PDF]
Water is one of the most significant destructive contaminations to lubricants which in turn lead to more power consumption and early damage to rotating machines.
Abusaad, Samieh +4 more
core
Boundary lubrication: Revisited [PDF]
A review of the various lubrication regimes, with particular, emphasis on boundary lubrication, is presented. The types of wear debris and extent of surface damage is illustrated for each regime.
Jones, W. R., Jr.
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Resolved simulations of submarine avalanches with a simple soft-sphere / immersed boundary method [PDF]
Physical mechanisms at the origin of the transport of solid particles in a fluid are still a matter of debate in the physics community. Yet, it is well known that these processes play a fundamental role in many natural configurations, such submarines ...
Bonometti, Thomas +2 more
core
Mixed Lubrication of Coupled Journal-Thrust Bearing Systems
Many mechanisms, such as computer hard drives, gear trains, and machine tool spindle systems, operate under both axial and radial loads, which should be respectively supported by a thrust and a journal bearing. By utilizing the end face of the shaft of a journal bearing as a thrust bearing, a coupled journal-thrust bearing system can be formed.
Wang, Yansong, Wang, Q. Jane, Lin, Chih
openaire +2 more sources
Boulder transport under mixed-lubrication friction
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
J. DuBerry-Mahon, J.G. Herterich
openaire +1 more source
Ciliary propulsion of objects in tubes: wall drag on swimming Tetrahymena (Ciliata) in the presence of mucin and other long-chain polymers [PDF]
The lubrication effect of three long-chain polymers - mucin, methylcellulose and Ficoll - on ciliary propulsion in tubes is measured by plotting the relative velocities of swimming cilitates as a function of the tube bore diameter.
Winet, H.
core
Lubricant effects on bearing life [PDF]
Lubricant considerations for rolling-element bearings have within the last two decades taken on added importance in the design and operation of mechanical systems.
Zaretsky, Erwin V.
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Chemistry: Space resources for teachers including suggestions for classroom activities and laboratory experiments [PDF]
Curriculum supplement to assist general chemistry teachers in updating instruction materials with aerospace ...
Bowman, W. H., Lawrence, R. M.
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