Results 41 to 50 of about 131,627 (329)

Dynamic Preventive Maintenance Optimization of Subway Vehicle Traction System Considering Stages

Applied Sciences, 2022
The current maintenance mode of the subway vehicle traction system does not consider the change of failure rate in the operation of components, and there is an unreasonable maintenance interval and high maintenance cost.
Qi Gong, Li Yang, Yonghua Li, Bin Xue
doaj   +1 more source

On‐Demand Activation of Thin Alginate Shell Encapsulated Volatile Liquid for Untethered Pneumatic Soft Actuation

Advanced Engineering Materials, EarlyView.
Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan, Jack Keddie, Byoungyoul Park, Hyun‐Joong Chung   +3 more
wiley   +1 more source

Rolling Bearing Fault Diagnosis Based on Optimized VMD and SSAE

IEEE Access
The monitoring and fault diagnosis of axle-box bearings in high-speed trains is crucial for ensuring safe train operations. The vibration signals of these bearings exhibit non-stationary and non-linear characteristics.
Baoxian Chang, Xing Zhao, Dawei Guo, Siyu Zhao, Jiyou Fei   +4 more
doaj   +1 more source

Study on the Extraction Method for Track-Side Acoustic Features Based on Cyclic Stationary Analysis

Machines, 2023
Because of its non-contact measurement characteristics, trackside acoustic technology is now utilized for train bearing fault diagnosis. However, the collected acoustic signal produces Doppler distortions that can impact the accuracy of bearing fault ...
Xing Zhao, Yiming Lu, Baoxian Chang, Liqun Chen   +3 more
doaj   +1 more source

Controlled Movement of Soft Actuators using Multi‐Responsive Microgel Arrays and Microcirculatory Systems

Advanced Functional Materials, EarlyView.
Microscale hydrogels (microgels) feature improved mass transport characteristics supportive of fast actuation and chemical tunability amenable to programmed stimuli response. A unique soft actuator architecture is realized by encapsulating microgels in soft microcirculatory systems which enable the convenient delivery of liquid stimuli for powering and
Nengjian Huang, Brennan P. Watts, Stephen A. Morin   +2 more
wiley   +1 more source

DC3 IS EIGHT-WHEELS LOCOMOTIVE WITH THE SECOND METHOD OF TRACTION RATIO, RATING OF DISCHARGING LOADS AND ADDITIONAL ONES OF ITS WHEELS AND DEFLECTIONS OF SPRING SUSPENSION DURING THE TRACTIONS EFFORTS TRANSFER FROM BOGIES TO CAR BODY WITH USING RECLINING

Nauka ta progres transportu, 2011
In the article the calculation formulas for determination of unloadings (finish loadings) of wheels and bendings of a spring suspension of eight-wheel electric locomotive DS3 with the traction transmission of the second kind at transmitting the traction ...
V. A. Bratash, T. I. Yefimova, U. Y. Povolotska   +2 more
doaj  

Research on Multi-System Integration Control for Urban Rail Transit Train Based on Time-Sensitive Networks

Chengshi guidao jiaotong yanjiu
[Objective] The architecture of traditional urban rail transit train control system faces challenges such as complex train network topology and wiring, increased delays in subsystem interactions, and poor coordination in complex control processes.
YANG Weijun, LI Yangtao, XUE Jiang, MEN Hongfang, LI Liran, ZHANG Zherui   +5 more
doaj   +1 more source

Stator ITSC Fault Diagnosis of EMU Asynchronous Traction Motor Based on apFFT Time-Shift Phase Difference Spectrum Correction and SVM

Energies, 2023
EMU (electric multiple unit) traction motors are powered by converters whose output voltage increases the voltage stress borne by the insulation system, making the ITSC (inter-turn short-circuit) fault more prominent.
Jie Ma, Xiaodong Liu, Jisheng Hu, Jiyou Fei, Geng Zhao, Zhonghuan Zhu   +5 more
doaj   +1 more source

Membrane Wrapping for High Capacity and Rapidly Switchable Adhesives

Advanced Functional Materials, EarlyView.
A membrane‐wrapping mechanism enables high‐capacity, rapidly switchable adhesion by coupling suction, friction, and adhesion. Broadband performance is achieved in dry and underwater conditions, allowing fast, reversible manipulation of objects of diverse sizes and shapes, from delicate eggs and berries to flat, complex, or heavy objects. These outcomes
Yeunhee Kim, Camryn A. Mills, Michael D. Bartlett   +2 more
wiley   +1 more source

Usage simulation methods for education [PDF]

, 2010
The paper deals with usage of computer simulation methods for education at Department of Electrical and Electronic Engineering and Signaling in Transport, Jan Perner Transport Faculty, University of Pardubice.
Doleček, Radovan, Černý, Ondřej
core   +1 more source