Results 81 to 90 of about 5,207 (292)

Design and Characterization of Twisted and Coiled Polymers and Their Applications as Soft Actuators

IEEE Access
This study is an experimental investigation of twisted and coiled polymer actuators, focusing on characterization of the effects of design and operating parameters on the actuator performance. Using nylon-6 monofilaments, a custom fabrication and testing
Jacob Martin, Marc Doumit
doaj   +1 more source

Conceptual mechanical design of antagonistic variable stiffness joint based on equivalent quadratic torsion spring

Science Progress, 2020
The variable stiffness joint is a kind of flexible actuator with variable stiffness characteristics suitable for physical human–robot interaction applications.
Jishu Guo
doaj   +1 more source

Variable Stiffness Actuators: Review on Design and Components

IEEE/ASME Transactions on Mechatronics, 2016
Variable stiffness actuators (VSAs) are complex mechatronic devices that are developed to build pas- sively compliant, robust, and dexterous robots. Numerous different hardware designs have been developed in the past two decades to address various demands on their functionality. This review paper gives a guide to the design process from the analysis of
Wolf, Sebastian, Grioli, G., Eiberger, Oliver, Friedl, Werner, Grebenstein, Markus, Höppner, Hannes, Burdet, Etienne, Caldwell, D., Carloni, R., Catalano, M., Lefeber, D., Stramigioli, S., Tsagarakis, N., Van Damme, M., Van Ham, R., Vanderborght, B., Visser, L.C., Bicchi, Antonio, Albu-Schäffer, Alin Olimpiu   +18 more
openaire   +3 more sources

Microgel‐Based 3D Bioprinting: A Convergent Strategy Integrating Material Design, Jamming Dynamics, and Biological Function

Advanced Healthcare Materials, EarlyView.
Microgel‐based 3D printed constructs represent a compelling and versatile innovation for engineering architecturally complex, dynamically remodelable, and biocompatible structures with high structural fidelity and bioactivity. By integrating material design, biofabrication, and biological function, these systems enable the development of adaptive ...
Elena Ghighină, Andreea Ioana Dinu, Jana Ghițman   +2 more
wiley   +1 more source

Increasing Variable Stiffness Actuator-Response Using an Electromagnetic Spring [PDF]

, 2019
An electromagnetic spring-based variable stiffness actuator is a new concept with the potential to change stiffness faster than mechanical springs can; however, its nonlinear elastic property is a challenge in actuator design.
Han-Ping Yang, Yang, Han Ping, Jang, Chau Shin, Herman van der Kooij, Chau-Shin Jang, Van Der Kooij, Herman   +5 more
core   +1 more source

Walking with a powered ankle-foot orthosis: the effects of actuation timing and stiffness level on healthy users

Journal of NeuroEngineering and Rehabilitation, 2020
Background In the last decades, several powered ankle-foot orthoses have been developed to assist the ankle joint of their users during walking. Recent studies have shown that the effects of the assistance provided by powered ankle-foot orthoses depend ...
Marta Moltedo, Tomislav Baček, Ben Serrien, Kevin Langlois, Bram Vanderborght, Dirk Lefeber, Carlos Rodriguez-Guerrero   +6 more
doaj   +1 more source

Plasmonic Enhancement of Fluorescence and Protein Dynamics in Living Mammalian Cells

Advanced Materials, EarlyView.
This study demonstrates plasmonic enhancement of the function of fluorescent voltage sensing proteins (genetically encoded voltage indicators, (GEVIs), QuasAr6) in live mammalian cells. Coupling to plasmonic nanoparticles does not just increase fluorescence, but influences the protein photocycle, creating a hybrid sensor with its response speed to ...
Marco Locarno, Qiangrui Dong, Marco Post, Xin Meng, Cristiano Glessi, Nynke Marije Hettema, Nidas Brandsma, Sebbe Blokhuizen, Alejandro Castañeda Garcia, Srividya Ganapathy, Thieme Schmidt, Lars van Roemburg, Bing Xu, Chun‐Ting Cho, Liedewij Laan, Miao‐Ping Chien, Daan Brinks   +16 more
wiley   +1 more source

Design of a New Nonlinear Stiffness Compliant Actuator and Its Error Compensation Method

Journal of Robotics, 2016
Compliant actuators are more advantageous than stiff actuators in some circumstances, for example, unstructured environment robots and rehabilitation robots. Compliant actuators are more adaptive and safe. Constant stiffness compliant actuators have some
Shaobin Lan, Zhibin Song
doaj   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Variable Stiffness Structures Utilizing Pneumatic Artificial Muscles

MATEC Web of Conferences, 2019
Pneumatic artificial muscles (PAMs) can offer excellent force-to-weight ratios and act as shape-changing actuator under injecting the actuation fluid into their bladders. PAMs could be easily utilized for morphing structures due to their millimeter-scale
Ning Feng, Chang Yingli, Wang Jingze
doaj   +1 more source