Results 91 to 100 of about 504 (216)

Adaptive fuzzy control for tendon-sheath actuated bending-tip system with unknown friction for robotic flexible endoscope

Frontiers in Neuroscience
IntroductionThe tendon-sheath actuated bending-tip system (TAB) has been widely applied to long-distance transmission scenes due to its high maneuverability, safety, and compliance, such as in exoskeleton robots, rescue robots, and surgical robots design.
Fan Ren, Xiangyu Wang, Xiangyu Wang, Ningbo Yu, Ningbo Yu, Jianda Han, Jianda Han   +6 more
doaj   +1 more source

Performance Estimation and Ex Vivo Validation of Untethered Magnetic Robots in Soft Tissue

Advanced Science, EarlyView.
This study presents an empirical model that quantitatively predicts the step‐out frequency of screw‐type untethered magnetic robots (UMRs) in soft viscoelastic environments, including ex vivo brain tissue. By integrating key parameters into a dimensionless framework, the model enables estimation of robot performance across a range of biological ...
Leendert‐Jan W. Ligtenberg, Thijs J. van der Burg, Stijn Y. Kolkman, Santiago Saavedra Castano, David Fernandez Rivas, Anke Klingner, Roger M. L. M. Lomme, Lucas S. Joziasse, Dorothee Wasserberg, H. Remco Liefers, Doron Ben Ami, Udi Sadeh, Oded Shoseyov, Giulio Dagnino, Pascal Jonkheijm, Jurgen J. Fütterer, Stefano Stramigioli, J. Frank W. Nijsen, Michiel C. Warlé, Islam S. M. Khalil   +19 more
wiley   +1 more source

Dicationic Ion‐Pair Doping Enables Stable and High‐Performing Conducting Polymers for Organic Thermoelectrics

Advanced Science, EarlyView.
TAB–2TFSI enables efficient ion‐pair doping across a wide range of conjugated polymers, where the strongly oxidizing TAB core drives charge transfer, and the TFSI counterions promote favorable ionic compensation. This dicationic dopant promotes uniform dopant distribution, improves structural order, and increases carrier delocalization, establishing a ...
Juhyung Park, Shubhradip Guchait, Tanmay Sinha, Cynthia Verduyckt, Vijitha Ignatious, Tzu‐Yi Yu, Heyi Xia, Altynay Kaidarova, Michael Ng, Siebe Detavernier, Martin Rosenthal, Maristella Alessio, Daniel Escudero, Guy Koeckelberghs, Francisco Molina‐Lopez   +14 more
wiley   +1 more source

Alternating Shear Force of Respiration Regulates Cell Interactions of Fibroblasts and Macrophages to Promote Soft Tissue Integration of Chest Wall Polyetheretherketone Implants

Advanced Science, EarlyView.
Given that PEEK chest wall implants induce shear force at the soft tissue‐implant interface due to respiratory motion in the early in vivo post‐implantation stage. We confirmed that this mechanical stimulus triggers the PIEZO1/ITGB1/YAP1 signalling axis in L929 and the STAT6/p‐STAT6 pathway in RAW264.7, which in turn mediates adhesion and migration of ...
Rou Huang, Yangfan Huo, Jin Liu, Sida Liu, Minghai Ma, Hao Guo, Yuanquan Zhang, Xing Li, Xiao Liang, Jiawei Xiu, Ying Sun, Lijun Huang, Xiaolong Yan, Weiwei Wu, Lei Wang   +14 more
wiley   +1 more source

Joint Friction Dynamic Estimation for Robotic Finger Using Novel Fixed-Time Adaptive Model Free Algorithm With ZNN-Based Approximator

IEEE Access
When performing delicate operations, robot fingers are often faced with the interference of unknown uncertainties and strong nonlinear friction dynamics, and advanced control strategies are needed to compensate for the uncertainties and nonlinear ...
Wang Yuanyang, Muhammad Nasiruddin Mahyuddin   +1 more
doaj   +1 more source

Targeting the PHB2–ACSL3 Lipid‐Remodeling Axis Overcomes Cisplatin Resistance by Restoring Ferroptosis in Gastric Cancer

Advanced Science, EarlyView.
ABSTRACT Platinum‐based chemotherapy resistance remains a major obstacle in gastric cancer (GC) treatment. Through integrated transcriptomic profiling of cisplatin‐resistant xenografts and pharmacogenomic interrogation of the NCI‐60 dataset, we identified Prohibitin‐2 (PHB2) as a previously unrecognized determinant of chemoresistance.
Liang Xu, Wanying Xiang, Xinyue Wang, Yue Pan, Jing Gao, Jiezhen Yang, Yufei Wang, Zhipu Zhu, Man Tong, Lei Jin, Yan Ye   +10 more
wiley   +1 more source

Hybrid friction modeling method for robot joints integrating mechanistic model and ensemble learning

工程科学学报
Robot integrated joints are extensively employed in the fields of medical and collaborative robots, and their friction characteristics are the crucial factors that affect robot performance. To improve the accuracy of the friction model, a hybrid friction
Jindong DENG, Hepeng NI, Shuai JI, Liang LIANG, Fengshan ZOU, Yingxin YE   +5 more
doaj   +1 more source

Velocity controller with friction compensation

IET Control Theory & Applications, 2007
The problem of velocity control concerning a manipulator arm is considered. It is assumed that the joint friction is described by a model that contains the Dahl effect. A joint velocity controller and a friction observer are expressed in terms of the normalised quasi-velocities (NQV).
openaire   +1 more source

A Modular Variable Stiffness Co‐Bot System Achieving Tasks Flexibility and Contact Compliance

Advanced Science, EarlyView.
Bio‐inspired antagonistic compliance enables a modular rigid‐soft co‐bot platform with variable stiffness for safe human‐robot interaction (HRI): Standardized interfaces support application‐driven configurations with tailored DoFs, workspace, and stiffness range, making the system suited to HRI and low‐volume automation.
Wenlong Gaozhang, Yue Li, Jialei Shi, Yaxi Wang, Kaspar Althoefer, Agostino Stilli, Helge A. Wurdemann   +6 more
wiley   +1 more source

Reducing Ion Transport Friction by Mitigated Diluent‐Solvent Interaction for Sodium–Sulfur Battery

Advanced Science, EarlyView.
A local high‐concentration electrolyte to balance the ionic conductivity and interfacial stability is developed through replacing the high solvating DME with the moderate solvating diethyl ether to mitigate the diluent‐solvent interaction and reduce the local dynamic friction for Na+ transport, while maintaining the anion‐rich solvation clusters and ...
Sihang Xia, Jia Xu, Songling Wu, Shanshan Cao, Zhanju Wang, Xiangyang Gu, Jiang Liang, Kangning Zhao, Weina Xu, Chao Yang   +9 more
wiley   +1 more source