Results 231 to 240 of about 213,216 (285)

Development of flexible pneumatic spherical joint

IEEE Conference on Robotics, Automation and Mechatronics, 2004., 2005
A flexible pneumatic spherical joint is mainly composed of three columnar elastic shells which are reinforced and restricted by embedded spiral metal wire. It is driven directly by compressed air. Following a brief introduction of the structure and working principles of the flexible pneumatic spherical joint, the static model is constructed to describe
null Guanjun Bao, null Libin Zhang, null Qinghua Yang, null Jian Ruan   +3 more
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Spherical Non-holonomic Joints

2019
In this chapter, a method to generate under-actuated robots by substituting ordinary spherical joints (S joints) with non-holonomic spherical joints is described, a topic that was already treated in [3, 4]. The practicalities of implementing non-holonomic spherical joints are also included.
Patrick Grosch, Federico Thomas
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Analysis of wear in a spherical joint

Tribology, 1968
Certain hip prostheses are essentially ball and socket joints with the materials of such characteristics that most of the wear must occur in the socket. For the most common movement, walking, the applied force and the axis of rotation are substantially constant in direction. It is shown that the direction in which wear takes place in the socket is not
R. D. McLeish, J. Skorecki
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Is the human acetabulofemoral joint spherical?

The Journal of Bone and Joint Surgery. British volume, 2010
The human acetabulofemoral joint is commonly modelled as a pure ball-and-socket joint, but there has been no quantitative assessment of this assumption in the literature. Our aim was to test the limits and validity of this hypothesis. We performed experiments on four adult cadavers. Cortical pins, each equipped with a marker cluster, were implanted in
A, Cereatti, F, Margheritini, M, Donati, A, Cappozzo   +3 more
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A lockable spherical joint for robotic applications

2014 IEEE/ASME 10th International Conference on Mechatronic and Embedded Systems and Applications (MESA), 2014
The paper proposes the mechanical design of a lockable spherical joint, which is designed to be manually or automatically configured in different kinematic solutions. In fact it can be used as a conventional spherical joint or converted in a universal joint or still downgraded to a revolute joint.
Matteo Palpacelli, Luca Carbonari, Giacomo Palmieri   +2 more
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A Coulomb Friction Model for Spherical Joints

22nd Biennial Mechanisms Conference: Robotics, Spatial Mechanisms, and Mechanical Systems, 1992
Abstract A method is presented to develop the “force-constraint” equations enforced by a spherical joint with Coulomb friction. The spherical joint is assumed to behave instantaneously as a revolute joint. This instantaneous revolute will have an axis along the instant screw axis between the two links connected by the joint.
L. J. Gutkowski, G. L. Kinzel
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Incipient Joint Motion Due to Spherical Explosion

Journal of the Engineering Mechanics Division, 1978
The problem of incipient joint/fault motion due to a spherical explosion in an infinite homogeneous isotropic rock mass is considered analytically. The mechanical response of intact rock is assumed to be elastic. The shear failure criterion for the joint or fault is taken to be of the usual Mohr-Coulomb form, which results in a single scalar quantity ...
James N. Johnson, Dave R. Schmitz
openaire   +1 more source