Results 71 to 80 of about 235,022 (318)

Anthropomorphic Soft Robotics - from Torque Control to Variable Intrinsic Compliance

, 2011
The paper gives an overview on the developments at the German Aerospace enter DLR towards anthropomorphic robots which not only try to approach the force and velocity performance of humans, but also have similar safety and robustness features based on a ...
Hirzinger, Gerd, Thomas Wimböck, Fuchs, Matthias, Markus Grebenstein, Haddadin, Sami, Gerd Hirzinger, Stemmer, Andreas, Borst, Christoph, Matthias Fuchs, Sami Haddadin, Christian Ott, Grebenstein, Markus, Oliver Eiberger, Albu-Schäffer, Alin Olimpiu, Sebastian Wolf, Andreas Stemmer, Wimböck, Thomas, Christoph Borst, Ott, Christian, Alin Albu-Schäffer, Eiberger, Oliver, Wolf, Sebastian   +21 more
core   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Optimal Control for maximizing Link Velocity of Robotic Variable Stiffness Joints

, 2011
In this paper we evaluate the potential of Variable Stiffness Actuation to utilize its inherent joint elasticity and capability to adjust the intrinsic joint stiffness.
Albu-Schäffer, Alin Olimpiu, Sebastian Wolf, Haddadin, Sami, Weis, Michael, Sami Haddadin, Alin Albu-Schäffer, Wolf, Sebastian, Michael Weis   +7 more
core   +1 more source

Analysis of Stiffness and Energy Consumption of Nonlinear Elastic Joint Legged Robot

Applied Bionics and Biomechanics, 2020
In order to reduce the energy consumption of the legged robot in walking, this paper designs a kind of nonlinear elastic joint from the flexible variable-stiffness joint based on the mammal walking on the limb and optimizes the leg structure of the ...
Dongliang Chen, Jindong Zhang, Xutao Weng, Yunjian Zhang, Zhonghui Shi   +4 more
doaj   +1 more source

Design and Modelling of a Cable-Driven Parallel-Series Hybrid Variable Stiffness Joint Mechanism for Robotics

, 2017
. The robotics, particularly the humanoid research field, needs new mechanisms to meet the criteria enforced by compliance, workspace requirements, motion profile characteristics and variable stiffness using lightweight but robust designs.
C. B. Yigit, P. Boyraz
semanticscholar   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices

Advanced Engineering Materials, EarlyView.
Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle, María Ángeles Navacerrada, Johan Christensen, Carlos González   +3 more
wiley   +1 more source

Modal Limit Cycle Control for Variable Stiffness Actuated Robots

, 2013
This paper presents a control approach to stabilize limit cycle motions along a mechanical mode of variable stiffness actuated (VSA) robots. Thereby, first a PD controller with gravity and Coriolis/centrifugal compensation shapes a desired dynamics ...
Garofalo, Gianluca, Gianluca Garofalo, Albu-Schäffer, Alin Olimpiu, Florian Petit, Petit, Florian, Dominic Lakatos, Alin Albu-Schaffer, Lakatos, Dominic, Ott, Christian, Christian Ott   +9 more
core   +1 more source

Influence of Geometric Design on Mechanical Performance of Auxetic Metastructure

Advanced Engineering Materials, EarlyView.
Strategic geometric reinforcement transforms auxetic performance. This study evaluates 3D‐printed arrowhead metastructures, revealing that a modified design with local ring reinforcement suppresses premature failure to achieve superior energy absorption and structural efficiency.
Muhammad Gulzari, Supharoek Sornsomrit, Muhammad Ayaz Akbar, Stephan Rudykh   +3 more
wiley   +1 more source

Compatibility of Methacrylate Based Resins Controls Interfacial Failure and Toughness in 3D‐Printed Multimaterial Composites

Advanced Engineering Materials, EarlyView.
This work shows that the mechanical performance of multimaterial digital light processing (DLP) printed thermoset composites is governed by resin compatibility and interfacial design rather than spatial patterning alone. Brittle and ductile resin combinations produced premature interfacial failure, while graded interfaces and mechanically compatible ...
Ahmed M. H. Ibrahim, Li Meng, Ahmad R. Najafi, Nicolas J. Alvarez   +3 more
wiley   +1 more source