Results 21 to 30 of about 52,446 (303)

Shear Test of Variable Depth RC Beams with Inflection Point [PDF]

MATEC Web of Conferences, 2019
Variable depth continuous box girder bridges are widely used recently. However, the influence mechanism of the inflection point and variable depth on the shear behaviour of this type bridge has not been fully understood.
Zheng Kaiqi, Kuwornu Michael, Liu Zhao
doaj   +1 more source

Algorithmic Design of Low-Power Variable-Stiffness Mechanisms

IEEE Transactions on Robotics, 2017
Compliant actuators enabling low power stiffness adaptation are missing ingredients and key enablers of next generation roboticsystems. One of the key components of these actuators is the mechanism implementing stiffness adaptation which requires sophisticated controland non-trivial mechanical design.
Vincent Chalvet, David J. Braun
openaire   +2 more sources

A Survey of Transoral Robotic Mechanisms: Distal Dexterity, Variable Stiffness, and Triangulation

Cyborg and Bionic Systems, 2023
Robot-assisted technologies are being investigated to overcome the limitations of the current solutions for transoral surgeries, which suffer from constrained insertion ports, lengthy and indirect passageways, and narrow anatomical structures. This paper
Xiaoyi Gu, Hongliang Ren
doaj   +1 more source

A New Variable Stiffness Design: Matching Requirements of the Next Robot Generation

, 2008
— Facing new tasks, the conventional rigid design of robotic joints has come to its limits. Operating in unknown environments current robots are prone to failure when hitting unforeseen rigid obstacles. Moreover, safety constraints are a major aspect for
Hirzinger, Gerd, Sebastian Wolf, Gerd Hirzinger, Wolf, Sebastian   +3 more
core   +1 more source

Immersion and Invariance Control for an Antagonistic Joint with Nonlinear Mechanical Stiffness

, 2010
Tendon controlled robots with nonlinear mechanical tendon stiffness are becoming more and more popular. With the appropriate actuation, the joint position and the stiffness between motor and link side can be prescribed at the same time. In this paper,
Hirzinger, Gerd, Wimböck, Thomas, Gerd Hirzinger, Ott, Christian, Thomas Wimbock, Christian Ott   +5 more
core   +1 more source

Wrist and forearm rotation of the DLR Hand Arm System: Mechanical design, shape analysis and experimental validation

, 2011
The DLR Hand Arm System is based upon the variable stiffness concept which has been recently developed to improve impact robustness and energy efficiency of modern robots. This paper continues the work on the bidirectional antagonistic variable stiffness
F. Petit, Friedl, Werner, Höppner, Hannes, W. Friedl, Petit , Florian, Gerd, Hirziner, H. Hoppner, G. Hirzinger   +7 more
core   +1 more source

A Home-Based Self-Powered Rehabilitation System With Variable Stiffness Mechanism

IEEE Transactions on Neural Systems and Rehabilitation Engineering
Home-based rehabilitation with robot assistance may significantly reduce therapist workload and facilitate post-stroke patient training. However, the lack of real-time therapist supervision requires higher safety, ease of use, and training efficiency of ...
Ke Shi, Yingchen Gao, Maozeng Zhang, Lifeng Zhu, Aiguo Song   +4 more
doaj   +1 more source

Variable Stiffness Mechanism for the Reduction of Cutting Forces in Robotic Deburring

Applied Sciences, 2021
One of the main issues related to robotic deburring is that the tool can get damaged or stopped when the burr thickness exceeds a certain threshold. The aim of this work is to devise a mechanism that can reduce cutting forces automatically, in the event ...
Matteo Bottin, Silvio Cocuzza, Matteo Massaro   +2 more
doaj   +1 more source

COMP–PMEPA1 axis promotes epithelial‐to‐mesenchymal transition in breast cancer cells

Molecular Oncology, EarlyView.
This study reveals that cartilage oligomeric matrix protein (COMP) promotes epithelial‐to‐mesenchymal transition (EMT) in breast cancer. We identify PMEPA1 (protein TMEPAI) as a novel COMP‐binding partner that mediates EMT via binding to the TSP domains of COMP, establishing the COMP–PMEPA1 axis as a key EMT driver in breast cancer.
Konstantinos S. Papadakos, Gilar Gorji‐bahri, Lejla Gradjan, Julia Zajac, Kacper Gil, Yvonne Thokozile Nduku, Anna M. Blom   +6 more
wiley   +1 more source

Shape-Locking Mechanism Using Double Pawl–Ratchet System for Endoscopic Surgery

IEEE Access
Flexible endoscopic instruments must achieve a balance between high maneuverability and sufficient stability to withstand external forces. However, conventional variable stiffness methods, such as thermal actuation, and particle jamming are limited by ...
Chanwoo Kim, Jaeyoun Kim, Seong-Il Kwon, Seonghyeon Won, Yeonho Ko, Daehie Hong   +5 more
doaj   +1 more source