Results 101 to 110 of about 2,655,722 (289)

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

Prescribed Performance Tracking of a Variable Stiffness Actuated Robot

IEEE Transactions on Control Systems Technology, 2015
This paper is concerned with the design of a state feedback control scheme for variable stiffness actuated (VSA) robots, which guarantees prescribed performance of the tracking errors despite the low range of mechanical stiffness. The controller does not assume knowledge of the actual system dynamics nor does it utilize approximating structures (e.g ...
Efi Psomopoulou, Achilles Theodorakopoulos, Zoe Doulgeri, George A. Rovithakis   +3 more
openaire   +4 more sources

Seamless Mechanical Programming Through Hybrid Epoxy–Acrylate Printing for Soft–Rigid Robots

Advanced Materials, EarlyView.
Hybrid epoxy‐acrylate printing enables seamless fabrication of soft–rigid robotic systems with covalently integrated interfaces and functionally graded mechanics. Grayscale exposure expands the accessible material space, enabling spatially programmed actuation through patterned stiffness while revealing the mechanics and durability of continuously ...
David C. Bershadsky, Franz A. Stolpen, Zachariah A. Page, Lillian Chin   +3 more
wiley   +1 more source

Design and Stiffness Modeling of a Novel Planar Parallel Robot with Variable Stiffness Actuators

Human-robot interaction applications require compliant actuation for enhanced safety and comfort. While compliant actuators were adopted in many robots of serial configurations, they are rarely used in parallel robots.
Majumder, Arunabha; id_orcid, Bai, Shaoping, Souza Oliveira, Anderson; id_orcid, Doruk Kiziloklu, Ibrahim   +3 more
core   +1 more source

Bipedal walking gait with variable stiffness knees [PDF]

, 2014
The Segmented Spring-Loaded Inverted Pendulum model is analysed, and it is shown that it exhibits walking gait. We propose a control architecture that exploits control of the knee stiffness to provide robustness of the system with respect to changes in ...
Raffaella Carloni, Carloni, Raffaella, Wesley Roozing, Roozing, Wesley ; id_orcid   +3 more
core   +1 more source

Directional Confinement Governed Ion Transport for Efficient Actuation

Advanced Materials, EarlyView.
Structural anisotropy provides an effective means to regulate ion transport in polymer electrolytes. Directionally aligned channels formed by freeze‐drying provide continuous pathways for ion migration, enhancing ion mobility and simultaneously improving the strain and blocking force of ionic actuators.
Yufei Zhang, Qiuchun Lu, Adit Gupta, Sen Wang, Xueyang Wang, Jian Yu, Xuanyi Hu, Daniel Mandler, Pooi See Lee   +8 more
wiley   +1 more source

Advances in Bio‐Integrated Edge Computing Systems for Smart and Connected Health

Advanced Materials, EarlyView.
This review explores advances in bio‐integrated edge computing for healthcare, focusing on co‐designing computing, sensing, and energy strategies to overcome integration and power challenges for optimized, decentralized operation. ABSTRACT Recent advances in bio‐integrated healthcare technologies have enabled continuous, high‐resolution monitoring and ...
Gyuwon Kim, Seungwon Yoo, Tae Woog Kang, Yunuo Huang, Woon‐Hong Yeo   +4 more
wiley   +1 more source

Stiffness Adjustment for a Single-Link Robot Arm Driven by Series Elastic Actuator in Muscle Training

IEEE Access, 2019
Series elastic actuators (SEAs) can improve the performance of robots and ensure their safety; therefore, they are widely applied in rehabilitation robots.
Siqi Li, Jian Li, Guihua Tian, Hongcai Shang   +3 more
doaj   +1 more source

Control of Actuators with Linearized Variable Stiffness

IFAC-PapersOnLine, 2019
Abstract In this paper, a new model of variable stiffness actuators (VSA) is presented. In the proposed model, the stiffness and deformation of the elastic element can be controlled independently. The structure of the model allows the use of optimal control methods, such as linear quadratic regulator, as is demonstrated in the paper. The model can be
Sergei Savin, Ramil Khusainov, Alexandr Klimchik   +2 more
openaire   +1 more source

Mechanoactive Biomaterials for Cell–Matrix Mechanotransduction

Advanced Materials, EarlyView.
The graphical abstract shows how individual triggers (force, light, or temperature) and combined optothermal or receptor‐targeted actuation induce material responses at the tissue, cellular, and receptor scales. Their spatial (global or focused) and temporal (continuous or cyclic) modulation determines the resulting mechanical output.
Yi‐Tung Lu, Alison E. John, Marc A. Fernández‐Yagüe   +2 more
wiley   +1 more source