检索范围:
排序: 展示方式:
Machine learning for fault diagnosis of high-speed train traction systems: A review
《工程管理前沿(英文)》 doi: 10.1007/s42524-023-0256-2
关键词: high-speed train traction systems machine learning fault diagnosis
杨伯原,郑培斌,苏冰,吴勇军,邓四二
《中国工程科学》 2002年 第4卷 第4期 页码 75-78
弹流拖动特性是润滑剂的重要性能,它对滚动轴承的 动态性能有着很大的影响。阐述了用自行设计的高速润滑脂弹流拖动力试验台在充分供脂条件下对国产7007和7018润滑脂进行的拖动力测试以及试验数据的处理,并提出了可供工程上使用的这两种润滑脂的弹流拖动系数计算公式。
刘友梅
《中国工程科学》 2000年 第2卷 第10期 页码 51-55
交通是社会经济运行的大动脉,轨道交通又一直是我国交通运输业的主体,而电力牵引已经成为轨道交通牵引动力的发展方向。文章从电力牵引轨道交通的技术优势出发,综述了国外电力牵引轨道交通的发展趋势和我国电力牵引轨道交通的发展历程,展望了我国电力牵引轨道交通的发展前景。
康熊
《中国工程科学》 2011年 第13卷 第1期 页码 62-68
随着我国高速铁路的发展,高速动车组列车牵引仿真计算具有重要意义。对高速动车组的牵引仿真计算的方法进行了研究,分析了与普通列车牵引计算的区别及相关的关键理论。介绍了自主研发的牵引仿真系统的构成和功能。以京沪高速铁路为计算实例,对4种不同的运行方案进行了仿真计算,对线路中的电分相的设置和影响进行了计算分析,并以京沪高速铁路先导试验段的冲高速试验为对象进行了模拟仿真。多次实际应用表明提出的高速动车组牵引仿真计算的方法具有良好的仿真精度和实用意义, 可以为我国高速铁路工程建设提供有效的手段,并据此提出了今后的发展方向。
Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 726-746 doi: 10.1007/s11465-021-0651-5
关键词: parallel mechanism upper-limb rehabilitation singularity and workspace analyses performance evaluation optimum design
Solid-state transformer-based new traction drive system and control
Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 411-426 doi: 10.1007/s11465-018-0467-0
A new type of traction drive system consisting of solid-state traction transformer (SSTT), inverter unit, auxiliary inverter, traction motor and other key components is built in order to suit the demand of developing the next-generation electric traction system which will be efficient and lightweight, with high power density. For the purpose of reducing system volume and weight and improving efficiency and grid-side power quality, an efficient SSTT optimized topology combining high-voltage cascaded rectifiers with high-power high-frequency LLC resonant converter is proposed. On this basis, an integrated control strategy built upon synchronous rotating reference frame is presented to achieve unified control over fundamental active, reactive and harmonic components. The carrier-interleaving phase shift modulation strategy is proposed to improve the harmonic performance of cascaded rectifiers. In view of the secondary pulsating existing in a single-phase system, the mathematical model of secondary power transfer is built, and the mechanism of pulsating voltage resulting in beat frequency of LLC resonant converter is revealed, so as to design optimum matching of system parameters. Simulation and experimental results have verified that the traction system and control scheme mentioned in this paper are reasonable and superior and that they meet the future application requirements for rail transit.
关键词: solid-state traction transformer high-voltage cascaded rectifier LLC resonant converter synchronous rotating reference frame carrier-interleaving phase shift control secondary pulsating voltage beat frequency
钱清泉,高仕斌,何正友,陈奇志,吴积钦
《中国工程科学》 2015年 第17卷 第4期 页码 9-20
本文结合中国高铁建设和运营的经验,从高速铁路牵引供电不同层面,系统地介绍了高铁牵引供电系统的一系列关键技术。同时,就目前牵引供电系统的发展现状,展望了新型供电技术、主动运营维护、节能与效能提升、检测监测等新技术,可为中国高铁牵引供电技术的发展与应用提供指导。
关键词: 高速铁路;牵引供电系统;关键技术
Current status and prospects of reliability systems engineering in China
《工程管理前沿(英文)》 2021年 第8卷 第4期 页码 492-502 doi: 10.1007/s42524-021-0172-2
关键词: reliability effectiveness model-based systems engineering reliability systems engineering
Rini NISHANTH, Andrew WHYTE, V. John KURIAN
《工程管理前沿(英文)》 2018年 第5卷 第3期 页码 357-368 doi: 10.15302/J-FEM-2018022
Floating production storage and offloading (FPSO) units increasingly represent a practical and economic means for deep-water oil extraction and production. Systems thinking gives a unique opportunity to seek a balance between FPSO technical performance(s), with whole-cost; stakeholder decision-making is charged to align different fit-for-use design specification options’ that address technical-motion(s), with respective life-cycle cost analyses (LCCA). Soft system methodology allows situation based analyses over set periods-of-time by diagnosing the problem-at-hand; namely, assessing the antecedents of life-cycle cost relative to FPSO sub-component design alternatives. Alternative mooring- component comparisons for either new-build hulls or refurbished hulls represent an initial necessary consideration to facilitate extraction, production and storage of deep-water oil reserves. Coupled dynamic analysis has been performed to generate FPSO motion in six degrees of freedom using SESAM DeepC, while life-cycle cost analysis (LCAA) studies give net-present-value comparisons reflective of market conditions. A parametric study has been conducted by varying wave heights from 4 – 8 m to understand FPSO motion behavior in the presence of wind and current, as well as comparing the motions of turreted versus spread mooring design alternatives. LCCA data has been generated to compare the cost of such different mooring options/hull conditions over 10 and 25-year periods. Systems thinking has been used to explain the interaction of problem variables; resultantly this paper is able to identify explicit factors affecting the choice of FPSO configurations in terms of motion and whole-cost, toward assisting significantly with the front-end engineering design (FEED) phase of fit-for-purpose configured FPSOs, in waters off Malaysia and Australia.
关键词: FPSO LCCA spread/turret-mooring DeepC cost motion soft-systems
TRANSFORMING CHINESE FOOD AND AGRICULTURE: A SYSTEMS PERSPECTIVE
《农业科学与工程前沿(英文)》 2023年 第10卷 第1期 页码 4-15 doi: 10.15302/J-FASE-2023493
● The goals of Chinese food and agriculture have shifted from grain self-sufficiency to diversified goals, including protecting natural resources, reducing pollution and greenhouse gas emissions, and improving food safety and nutrition.
TRANSFORMATION OF FOOD SYSTEMS: HOW CAN IT BE FINANCED?
《农业科学与工程前沿(英文)》 2023年 第10卷 第1期 页码 109-123 doi: 10.15302/J-FASE-2023483
● The analysis of financing for the transformation of food systems requires first a consideration of costs.
关键词: financial markets food systems development financing consumer expenditures public budgets Sustainable Development Goals
Transition towards carbon-neutral electrical systems for China: Challenges and perspectives
《工程管理前沿(英文)》 2022年 第9卷 第3期 页码 504-508 doi: 10.1007/s42524-022-0220-6
关键词: carbon neutrality power systems electrification renewable energy
Applying an Integrated Systems Perspective to the Management of Engineering Projects
Simon P. Philbin
《工程管理前沿(英文)》 2015年 第2卷 第1期 页码 19-30 doi: 10.15302/J-FEM-2015004
关键词: integrated systems perspective engineering projects management
标题 作者 时间 类型 操作
Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb
期刊论文
Solid-state transformer-based new traction drive system and control
Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG
期刊论文
Floating production storage and offloading systems’ cost and motion performance: A systems thinking application
Rini NISHANTH, Andrew WHYTE, V. John KURIAN
期刊论文