Results 51 to 60 of about 516 (189)

Rapid Coupling Prediction for Compact GNSS Arrays via Graph Transformer

Electronics Letters, Volume 61, Issue 1, January/December 2025.
The design of compact GNSS antenna arrays requires rapid evaluation of mutual coupling effects, which conventional full‐wave simulations fail to deliver due to excessive computational costs. This letter proposes a graph transformer model that predicts coupling matrices in real time. By hybridizing the local perception of graph isomorphism network (GIN)
Xiangjun Li, Xiaozhou Ye, Xiaoyu Zhao, Zukun Lu, Feixue Wang, Peiguo Liu   +5 more
wiley   +1 more source

Research on Control of Short EMU Reconnection Passing Neutral Section

机车电传动, 2021
In order to solve the problem that the reconnection of CRH6F-A/CRH6A-A short intercity EMU can not meet the requirements of the length of neutral section of domestic lines, the reconnection control method of short intercity EMU was studied,and the ...
Wantao XU, Zhaoxiang TANG, Zheng CHEN, Pengfei CHI, Zhuangzhuang XIN   +4 more
doaj  

Pantograph Arc Detection of Urban Rail Based on Photoelectric Conversion Mechanism

IEEE Access, 2020
According to the solar-blind characteristic of the pantograph arc spectrum distribution, an arc detection method based on the photoelectric conversion mechanism for urban rail was proposed, and the design of each part of the arcing detection system was ...
Xiaoying Yu, Hongsheng Su
doaj   +1 more source

Availability Evaluation of Overhead Contact Lines Based on a Stochastic Colored Petri Nets Model

IET Electrical Systems in Transportation, Volume 2025, Issue 1, 2025.
Due to their nonbackup characteristics and constant exposure to outdoor conditions, the performance of overhead contact lines (OCLs) will gradually degrade over time and further result in equipment defects or frequent failures. These issues significantly impact system availability and incur substantial repair costs.
Jingheng Zhou, Shibin Gao, Long Yu, Bohan Li, Youcef Belkhier   +4 more
wiley   +1 more source

Simulation Study on Arc Temperature of Urban Rail DC Pantograph-Catenary and Arc Ablation of Contact Line

Machines
The high temperature generated by the DC pantograph-catenary arc of urban rail systems will aggravate the wear of the pantograph-catenary system. When the ablation intensifies, it will lead to disconnection accidents on the contact line.
Xiaoying Yu, Ze Wang, Mengjie Song, Liying Song, Junrui Yang, Yang Su   +5 more
doaj   +1 more source

Study on electric spark discharge between pantograph and catenary in electrified railway

IET Electrical Systems in Transportation, 2022
The electric spark caused by pantograph‐catenary (PC) electrical contact failure happens frequently, it is a kind of arcing phenomenon which can severely affect the current collection of PC. The theoretical analysis and modelling of PC electric spark are
Hongyi Zhou, Fuchuan Duan, Zhigang Liu, Long Chen, Yang Song, Yexin Zhang   +5 more
doaj   +1 more source

The walking robot project [PDF]

, 1991
A walking robot was designed, analyzed, and tested as an intelligent, mobile, and a terrain adaptive system. The robot's design was an application of existing technologies.
Bennett, M., Sagraniching, E., Singh, R., Williams, P.   +3 more
core   +1 more source

GENETIC ALGORITHM-PID CONTROLLER FOR MODEL ORDER REDUCTION PANTOGRAPHCATENARY SYSTEM [PDF]

, 2021
Controlling the contact force between the pantograph and the catenary has come to be a requirement for improving the performances and affectivity of high-speed train systems Indeed, these performances can also significantly be decreased due to the fact ...
Abboud, Izz K., Al-Awad, Nasir A., Al-Rawi, Muaayed F.   +2 more
core   +2 more sources

Modular and Transformable Six‐Legged Robot: Mathematical Modeling

Journal of Engineering, Volume 2025, Issue 1, 2025.
A transformable limb system is a single‐degree‐of‐freedom linkage connecting three legs of a hexapod, comprising two identical three‐legged platforms. These legs are based on the Peaucellier–Lipkin mechanism. The group of legs attached to the same platform adjusts its movement based on the all‐or‐nothing postures of the transformable limb system.
Ignacio Juárez-Campos, Ricardo Estebané Arroyo-Piñón, Emil Dumic   +2 more
wiley   +1 more source

A New Method for Pantograph-Catenary Arc Detection Based on Acoustic Signals

Chengshi guidao jiaotong yanjiu
ObjectiveTo enhance the accuracy and precision of arc detection in urban rail transit and address the limitations of existing arc detection methods such as electrical and optical approaches, it is necessary to develop new pantograph-catenary arc ...
Zixian YANG, Ning ZHOU, Maorui LI, Jiale WANG   +3 more
doaj   +1 more source