Results 51 to 60 of about 3,333 (268)

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

A Survey of Interlayer Interaction Models for Graphene and Other 2D Materials

Advanced Materials Interfaces, EarlyView.
Van der Waals interactions arising from electronic polarization at atomically close interfaces generate corrugated interlayer energy landscapes that govern normal and tangential tractions. This review presents an overview of quantum, atomistic, analytical, and continuum modeling approaches, highlighting their roles across length scales in capturing ...
Gourav Yadav, Shakti S. Gupta, Roger A. Sauer   +2 more
wiley   +1 more source

Research on Stick-slip Vibration Level Estimation of Drillstring Based on SVM

Shiyou jixie, 2019
To evaluate the severity of stick-slip vibration of drill string, a risk assessment method based on factor analysis (FA) and support vector machine (SVM) is proposed.
Chen Chong, Zhang Shimin, Peng He, Cui Can, Liu Yang   +4 more
doaj  

Dynamic models and analysis of key factors influencing stick–slip vibration in disc brake system

Railway Engineering Science
The stick–slip vibration of the disc brake system at low speed is caused by the interaction of multiple factors. This paper focuses on the disc brake system of the high-speed train as the research object, establishing three- and four-degree-of-freedom ...
Hangyu Zhou, Zhiwei Wang, Quan Wang, Jiliang Mo, Chunguang Zhao, Kaiyun Wang   +5 more
doaj   +1 more source

Design Method of Adaptive Drilling Stick-Slip Vibration Downhole Control Tool

Shiyou jixie
There are few reports on the design method for downhole stick-slip vibration adaptive prevention and control tool， and the key parameter design models and methods are not yet perfect.
Zhou Bo, Li Bing, Wang Lincong, Zhang Fucheng, Yu Jing, Si Boyu   +5 more
doaj   +1 more source

Research on Evaluation Model of Stick-Slip Vibration Intensity Based on PCA-LSTM

Shiyou jixie, 2023
Stick-slip vibration of downhole tools during petroleum drilling can lead to cyclic sticking and slip of the bits,which may cause failure of bits and bottomhole assembly(BHA)and consequently downhole accidents.Considering the latest downhole measurement ...
Zhang Xin, Zhang Tao, Li Yumei, Fang Ping   +3 more
doaj  

Recent Advances of Slip Sensors for Smart Robotics

Advanced Materials Technologies, EarlyView.
This review summarizes recent progress in robotic slip sensors across mechanical, electrical, thermal, optical, magnetic, and acoustic mechanisms, offering a comprehensive reference for the selection of slip sensors in robotic applications. In addition, current challenges and emerging trends are identified to advance the development of robust, adaptive,
Xingyu Zhang, Liao Wu, Shuai He, Zhao Sha, Yuwan Huang, Shuying Wu, Dewei Chu, Chun H. Wang, Shuhua Peng   +8 more
wiley   +1 more source

Stick-slip suppression and speed tuning for a drill-string system via proportional-derivative control

, 2020
This paper studies the problems of stick-slip mitigation and speed tuning for a lumped-parameter drill-string system by using a proportional-derivative feedback controller via path-following analysis.
Y Liu (4702669), Y Yang (6099497), Y Kuang (13546102), W Lin (8057912), JP Chávez (21913118)   +4 more
core  

Hysteretic behavior of a belt tensioner: modeling and experimental investigation [PDF]

, 2005
In this paper we describe the modeling of the hysteretic behavior of belt tensioners. An initial experimental device is composed only of the tensioner by using forcing frequencies, preloads and deflection amplitudes.
Dufour, Regis, Michon, Guilhem, Manin, Lionel   +2 more
core   +1 more source

Hierarchical Multi‐Material Architectures With Gradient Design for Dynamic‐Range Flexible Tactile Sensing

Advanced Materials Technologies, EarlyView.
Hierarchical multi‐material TPMS lattices are engineered as flexible tactile sensors by combining soft and stiff elastomeric layers with a conformal conductive coating. The bilayer architecture delivers sensitivity at low pressures while maintaining a broad detectable range under large loads, enabling reliable pressure and vibration monitoring for ...
Reza Noroozi, Domenic Quiquero, Yan Yan Shery Huang, HaoTian Harvey Shi   +3 more
wiley   +1 more source