Results 71 to 80 of about 1,466 (183)
Magnetic resonance imaging of the joints: a revolution for the practicing rheumatologist
Reumatismo, 2011 In the last 15 years, new imaging techniques have changed the life of practicing rheumatologists in terms of both diagnostic approach and knowledge of disease mechanisms. Clinical symptoms, disease signs and the results of physical examination have been more closely related to their anatomical basis.
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The modelling of two DOF joints controlled by elastic inner ties
ITM Web of Conferences, 2017 This paper considers the mathematical model of two types of joints that can be used to connect the arms of two robots. The first of them is a simple revolute joint with one degree of freedom and the second is a universal joint with two degrees of freedom.
Ożóg Dominik
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Contact Model of Revolute Joint with Clearance Based on Fractal Theory
Chinese Journal of Mechanical Engineering, 2018 The contact stiffness of a mechanical bonding surface is an important parameter in determining the normal and radial contact force. To improve the calculation accuracy of the contact force model, the surface roughness of the bonding surface and the ...
Shi-Hua Li +4 more
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Kinematics and dynamics analysis of a novel 2PC-CPR parallel mechanism
International Journal of Advanced Robotic Systems, 2016 A novel parallel mechanism of two translations and one rotation freedom degrees two-prismatic joint-cylindrical joint-one-cylindrical joint-prismatic joint-revolute joint (2PC-CPR) is proposed. The mechanism can be applied to write Chinese characters and
Sheng Lin +4 more
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A decentralized approach for the aerial manipulator robust trajectory tracking.
PLoS ONEThis paper introduces a new decentralized control strategy for an unmanned aerial manipulator (UAM) constrained to the vertical plane. The control strategy comprises two loops: the first compensates for the aerial vehicle's impact on the manipulator; and
Yarai Elizabeth Tlatelpa-Osorio +2 more
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Extended and Unscented Kalman Filtering Applied to a Flexible-Joint Robot with Jerk Estimation
Discrete Dynamics in Nature and Society, 2010 Robust nonlinear control of flexible-joint robots requires that the link position, velocity, acceleration, and jerk be available. In this paper, we derive the dynamic model of a nonlinear flexible-joint robot based on the governing Euler-Lagrange ...
Mohammad Ali Badamchizadeh +2 more
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Jixie chuandong, 2001 This paper takes account of the boundary condition of elements of a joint with clearance when contact occur, by using the nonlinear spring damper formulation to model the resulting reaction force between the elements of clearance joint.
王国庆, 刘宏昭
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LubricantsJoint clearances inevitably deteriorate kinematic accuracy and operational stability of heavy-load mechanical presses. Most existing studies focus on single-type clearances or uniform contact states, failing to reveal the coupled dynamic behavior of ...
Xuze Wu +6 more
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MachinesThe design, control, simulation and animation of robotic systems heavily depend on dynamic modeling. A variety of studies have explored different dynamic modeling methodologies applied to diverse robotic mechanisms. Artificial neural networks (ANNs) have
Onur Denizhan
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International Journal of Advanced Robotic Systems, 2014 This paper presents a new end-effector as a key component for a robotic needle insertion-type intervention system and its kinematic analysis. The mechanism is designed as a spherical mechanism with a revolute joint and a curved sliding joint, and its ...
Youngjin Moon +3 more
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