Results 71 to 80 of about 38,943 (291)

Design and optimal springs stiffness estimation of a Modular OmniCrawler in-pipe climbing Robot

, 2017
This paper discusses the design of a novel compliant in-pipe climbing modular robot for small diameter pipes. The robot consists of a kinematic chain of 3 OmniCrawler modules with a link connected in between 2 adjacent modules via compliant joints. While
Krishna, K. Madhava, Sachdeva, Enna, Sarkar, Abhishek, Singh, Akash   +3 more
core   +1 more source

Resolving Complex Multiscale Structure of Magneto‐ and Electroactive Polymer Composites With an Ionic Liquid

Advanced Materials, EarlyView.
Multiscale ionic liquid segregation into nano‐sized domains in the unconfined amorphous polymer phase and into micron‐sized pores enables a coupled magneto‐ and electroactive responses. ABSTRACT A multiscale understanding of the structure of ionogels – nanoparticle‐free polymer composites incorporating ionic liquids – is essential for enhancing their ...
Andrey Shibaev, Jon Maiz, Viktor Petrenko, Amaia Iturrospe, Josu Fernández Maestu, José María Porro, Mariano Barrado, Laura Casado, Joachim Kohlbrecher, Petr Shvets, Evgeny Modin, Ana Sofia Castro, Andrey Chuvilin, José María De Teresa, Daniela M. Correia, Arantxa Arbe, Senentxu Lanceros‐Méndez   +16 more
wiley   +1 more source

EM-Act: A Modular Series Elastic Actuator for Dynamic Robots

IEEE Open Journal of the Industrial Electronics Society
The trend of current robotic research is to develop mobile robots that can perform highly dynamic tasks, which include jumping and running. To be employed profitably, this research necessitates a significant amount of work in the development of ...
Ramesh krishnan Muttathil Gopanunni, Lorenzo Martignetti, Francesco Iotti, Alok Ranjan, Franco Angelini, Manolo Garabini   +5 more
doaj   +1 more source

Position and torque tracking: Series elastic actuation versus model-based-controlled hydraulic actuation

2011 IEEE International Conference on Rehabilitation Robotics, 2011
Robotics used for diagnostic measurements on, e.g. stroke survivors, require actuators that are both stiff and compliant. Stiffness is required for identification purposes, and compliance to compensate for the robots dynamics, so that the subject can move freely while using the robot.
Otten, Alexander, van Vuuren, Wieke, Stienen, Arno, van Asseldonk, Edwin H.F., Schouten, Alfred, van der Kooij, Herman   +5 more
openaire   +2 more sources

Design of a fretting fatigue test rig with compliant springs [PDF]

, 2013
Fretting is a small amplitude oscillatory movement which occurs between contacting bodies who are subjected to cyclic loading or vibrations. In the contact area arise stresses -normal and tangential- causing stress concentrations and surface degradation.
De Baets, Patrick, De Pauw, Jan, De Waele, Wim, Hojjati Talemi, Reza   +3 more
core  

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

Advanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia, Rogelio Ortigosa, Jesús Martínez‐Frutos, Daniel Garcia‐Gonzalez   +3 more
wiley   +1 more source

The Challenges and Achievements of Experimental Implementation of an Active Transfemoral Prosthesis Based on Biological Quasi-Stiffness: The CYBERLEGs Beta-Prosthesis

Frontiers in Neurorobotics, 2018
The CYBERLEGs Beta-Prosthesis is an active transfemoral prosthesis that can provide the full torque required for reproducing average level ground walking at both the knee and ankle in the sagittal plane. The prosthesis attempts to produce a natural level
Louis Flynn, Joost Geeroms, Rene Jimenez-Fabian, Sophie Heins, Bram Vanderborght, Marko Munih, Raffaele Molino Lova, Nicola Vitiello, Nicola Vitiello, Dirk Lefeber   +9 more
doaj   +1 more source

Elastomeric Micro‐Balloons for Remote Control of Cerebral Blood Flow and Real‐Time In vivo Imaging of Rodent Brain Response to Hypoperfusion

Advanced Materials, EarlyView.
This study reports the fabrication of MRI‐compatible elastomeric micro‐balloons via a multi‐step bubble casting process, where the monolithic elastomeric wall is selectively stiffened for reversible and controlled inflation and elasticity, depending on the target vessels for graded occlusion of cerebral arteries.
Jong Bin Kim, Jinghui Wang, Yinding Chi, Jingxian Wu, Alicia Ng, Guanda Qiao, Honglin Tan, Miroslaw Janowski, Piotr Walczak, Yajie Liang, Shu Yang   +10 more
wiley   +1 more source

Concept of a Series-Parallel Elastic Actuator for a Powered Transtibial Prosthesis

Actuators, 2013
The majority of the commercial transtibial prostheses are purely passive devices. They store energy in an elastic element during the beginning of a step and release it at the end.
Bram Vanderborght, Dirk Lefeber, Pierre Cherelle, Glenn Mathijssen   +3 more
doaj   +1 more source

Series Elastic Actuators for Small-Scale Robotic Applications [PDF]

Journal of Mechanisms and Robotics, 2017
Torque control of small-scale robotic devices such as hand exoskeletons is challenging due to the unavailability of miniature and compact bidirectional torque actuators. In this work, we present a miniature Bowden-cable-based series elastic actuator (SEA) using helical torsion springs.
Priyanshu Agarwal, Ashish D. Deshpande
openaire   +1 more source