Results 171 to 180 of about 12,512 (217)
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On the positioning of revolute-joint robot manipulators
Journal of Robotic Systems, 2000Summary: We develop a new technique for obtaining the sets of joint-motor-displacements which correspond to a desired spatial pose at the end-effector of a revolute-joint manipulator. The properties of rotation are exploited, and a local coordinate notation is introduced to obtain the required solution. We obtain two simplified sets of linear equations
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A Novel Pressure-Controlled Revolute Joint with Variable Stiffness
Soft Robotics, 2022The compliance and deformability of soft robotics allow human–machine interactions in a safe manner without the need of sophisticated control systems inherent in rigid-body robotic devices. However, these advantages introduce controllability and predictability challenges.
Canberk Sozer +3 more
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Detection of Mechanical Play of Revolute Robot Joint
Proceedings of the 11th International Conference on Informatics in Control, Automation and Robotics, 2014This article introduces a method of detection of mechanical play of revolute joint based on recognition of impacts caused by the play. The method uses inexpensive acceleration measuring device with limited sampling frequency. The impact is recognized indirecly according to oscillation of mechanical oscilator.
Radim Luza, Frantisek Zboril
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Artificial joints: A biotechnological revolution
The Surgeon, 2005HISTORY Palaeontologists have demonstrated arthritic changes in skeletons thousands of years old. The diverse attempts at surgical reconstruction of destroyed joints bear testimony to the remarkable ingenuity of the surgeons of yesteryear, whose efforts were largely sabotaged by material incompatibility and mechanical failure.
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The 1970s – A joint revolution
Journal of Orthopaedic Nursing, 2009Summary This article considers how the nature of orthopaedics changed from a focus on immobilisation and nursing care to specialised surgery. Problems of infection and thromboembolism were already a matter for concern, which increased with the increase in technological interventions. This article considers the development of joint surgery in the 1970s
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Dynamic response of a revolute joint with clearance
Mechanism and Machine Theory, 1996The response of a revolute joint in a four-bar mechanism with a clearance is investigated. Motion of a rocker-arm pin at the ground connection is modelled using a Lagrangian approach. When the resulting equations of motion are solved numerically, they show non-linear dependence on both the size of the clearance and the coefficient of friction between ...
Jungkeun Rhee, Adnan Akay
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Preliminary design of a revolute to prismatic morphing compliant joint
Transactions of the Canadian Society for Mechanical Engineering, 2020The reduction of weight and size of mechanisms are important and difficult challenges considering portability, energy efficiency, and simplicity of fabrication. One of the solutions to address these issues consists of mechanisms with variable topology for which the mobility of the output is a succession of several simpler elementary motions.
Nicolas Mouazé, Lionel Birglen
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A Mechatronic Testbed for Revolute-Joint Prototypes of a Manipulator
IEEE Transactions on Robotics, 2006This paper describes the design and development of a mechatronic testbed facility which allows high-fidelity and low-cost testing of the joint prototypes of a manipulator in a highly flexible environment. The testbed system consists of a set of load motors whose shafts are connected to those of the joint prototypes through a set of torque transducers ...
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Variable Stiff Revolute Joint for Compliant Robot
Volume 6: Design, Systems, and Complexity, 2021Abstract Over the past decades industrial robot manipulators have expanded throughout the automation landscape with their high degree of repeatability and accuracy. For safety reasons these robots are not allowed to share their workspace along with humans, which limits the various tasks that can be performed by a human-robot ...
Manoj K. Sharma, Christopher Kitts
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Parameter identification for joint elements in a revolute-joint detector manipulator
SPIE Proceedings, 2005A revolute-joint robot is being developed for the spatial positioning of an x-ray detector at the Advanced Photon Source. Commercially available revolute-joint manipulators do not meet our size, positioning, or payload specifications. One idea being considered is the modification of a commercially available robot, with the goal of improving the ...
Curt Preissner +2 more
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