Results 291 to 300 of about 37,901 (338)

Phase-Space Reconstructions and Stick-Slip

Nonlinear Dynamics, 1997
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Feeny, B. F., Liang, J. W.
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Robust Nonlinear Stick-Slip Friction Compensation

Journal of Dynamic Systems, Measurement, and Control, 1991
A nonlinear compensation force for stick-slip friction is developed to supplement a proportional + derivative control law applied to a one-degree-of-freedom mechanical system. Inertial control objects acted on by stick-slip friction are common mechanical components in mechanical servo systems and the conceptual model chosen for this investigation is a ...
Southward, S. C., Radcliffe, C. J., MacCluer, C. R.   +2 more
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Stick slip, charge separation and decay

pure and applied geophysics, 1986
Measurements of charge separation in rock during stable and unstable deformation give unexpectedly large decay times of 50 sec. Time-domain induced polarization experiments on wet and dry rocks give similar decay times and suggest that the same decay mechanisms operate in the induced polarization response as in the relaxation of charge generated by ...
D. A. Lockner, J. D. Byerlee, V. S. Kuksenko, A. V. Ponomarev   +3 more
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Optimal Vibratory Stick-Slip Transport

IEEE Transactions on Automation Science and Engineering, 2008
We describe a vibratory part transport mechanism that utilizes both static and dynamic friction to linearly transport parts in a horizontal direction. We derive a horizontal driving profile for the feeder surface that maximizes the steady-state velocity of parts on the surface subject to acceleration limits on the surface.
P. Umbanhowar, K.M. Lynch
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Stick-Slip Vibration

2010
It is known that nonlinearities in the friction-velocity curves of dry friction may lead to instability of the steady frictional sliding, namely, friction-induced vibration. The Froude pendulum and the motion of a violin string under the action of a bow are frequently used as examples of friction-induced vibration.
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Atomic-Scale Stick Slip

2001
Atomic-scale stick-slip is one of the fundamental friction processes. It has been observed on layered materials, such as graphite, or ionic crystals, such as NaCl(001). Recently, wearless friction was also observed on clean metallic surfaces, such as Cu(111).
R. Bennewitz, E. Meyer, M. Bammerlin, T. Gyalog, E. Gnecco   +4 more
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Stick-slip en forage pétrolier

Revue Française de Génie Civil, 2000
L'etude de la dynamique d'une structure de forage est proposee en torsion. Les instabilites de torsion, generalement connues sous le nom de stick-slip, peuvent conditionner toute une phase de forage et reduisent les performances du systeme. Des mesures des parametres a l'outil sont obtenues a l'aide d'un outil instrumente. Deux plages de fonctionnement
Noël Challamel, Hédi Sellami, Luc Gossuin   +2 more
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Stick-slip response in electrorheological fluids

Physical Review E, 1993
Experimental observations of stick-slip friction are reported in an electrorheological fluid. The results are consistent with shear-induced phase transitions between solid and liquid phases. During the slip, there is a liquid flowing between two columnar solid phases.
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Frictional Dissipation in Stick-Slip Sliding

Physical Review Letters, 2007
The time variation of the frictional force between two surfaces, undergoing stick-slip sliding across a molecularly thin film of a confined model liquid, was examined at high time and force resolution, showing clearly that dissipation of energy occurs both during the slip, and at the instant of stick (via transfer of residual momentum).
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Complimentarity Problems of Stick-Slip Vibrations

14th Biennial Conference on Mechanical Vibration and Noise: Dynamics and Vibration of Time-Varying Systems and Structures, 1993
Abstract Multibody systems with many friction contacts not being decoupled by some force laws afford a special treatment with respect to the uniqueness of the solution after a contact event. This problem can be solved by an optimization techniques including unequality constraints which corresponds exactly to the physical properties of ...
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